Class-7_Sunrise

 

Class 7

Computer

Reference Book Sunrise publication

Chapter - 1 Computer Overview
Chapter - 2 History and Generation of Computer
Chapter  - 3 Types of Computer
Chapter-  4 Computer Hardware and Software
Chapter - 5 Operating System (Microsoft Windows 8)
Chapter -  6 Word processing Software (Microsoft Word 2016)
Chapter - 7 Spreadsheet Software (Microsoft Excel 2016)
Chapter -8 Presentation Software (Microsoft PowerPoint)

Chapter - 10 ICT Tools And Cyber Ethics
Chapter - 11     Computer Virus and Its Remedy
Chapter - 12     Computer Network and the Internet
Chapter - 13     Computer Graphics
Chapter - 14     Multimedia and its uses

Chapter - 16 I Introduction to QBASIC Programming Language

Chapter - 16 II Elements of QBASIC programming Language.

 

Computer Overview

Q.7. Write very short answer of the following questions.
a. What do you mean by data?
Ans: Data are the facts or symbols also known as unprocessed information collected from various sources.
b. What is the measurement unit of clock speed of computer?
Ans: The measurement unit of clock speed of computer is megahertz (MHz) or gigahertz (GHz)
c. Write any one use of computer in medical field.
Ans: Computer are used in medical field for diagnosing illness and monitoring the condition of patients.
d. Which unit of computer is used to process data?
Ans: CPU is the part of computer which process data.
e. Is computer an electronic device?
Ans: Yes, computer is an electronic device.
f. What is GIGO?
Ans: If the data and instruction given to the computer are correct, it will always produce accurate result but sometimes it also produce undesirable result which is due to wrong input it is known as GIGO.
g. Why is computer called versatile machine?
Ans: A computer can perform different kinds of tasks one by one simultaneously so computer is called versatile machine.

Q.7. Write short answer of the following question.
a. Define computer and draw the figure of computer.
Ans:  Computer is the electronic device that takes data and instructions as an input, process them according to the given set of instruction, stores and gives the meaningful information or result as output.
b. How are computer used in education and entertainment?
Ans: Computer in Education
Computers are widely used in the field of education. Teachers can explain difficult topics more clearly and easily to their students. Using computer, student can search books, can read books and magazines. Open universities are launching their distance learning programs like CBT or CAI. Also many websites provide online education so the computer is playing very important role in the field of education.
       Computer in Entertainment
Now a days computer can be taken as a good means of entertainment. We can play games, watch movies and listen music on the computer. 3D movies and cartoon are made by adding special visual effects with the help of computer which makes us more entertainment and looks like real.
c. Explain the working system of a computer with an example.
Ans: Computer perform any tasks in three steps
1. Take data and instruction as an Input
2. Process the Input data
3. Gives the output
eg:

d. List any four characteristics of a computer.
Ans: Four characteristics of computer are as follows:
i) High speed       ii) Accuracy           iii) Diligence              iv) versatility
e. List any five application fields of a computer.
Ans: Application fields of computer are as follows:
i) Home ii)         Education        iii) Medicine and Health      iv) Entertainment        v) Business
f. Why is computer called an information processing machine?
Ans: Computer is the electronic device that takes data and instructions as an input, process them according to the given set of instruction, stores and gives the meaningful information or result as output so computer is called an information processing machine.

History and Generation of Computer

 

History and Generation of Computer

Exercise
Q.1. Write down the name of inventors for the following computing device.
Devices                                                    Inventors and date of Invention
Abacus >>>                          Chinese, Egyptian around 3000 BC
Napier's Bone  >>>              John Napier in 1614 AD
Slide Rule >>>                     William Oughtred in 1620 AD
Pascaline >>>                       Blaise Pascal  in 1642 AD
Stepped Reckoner >>>         Gottfried Wilhelm Von Leibniz in 1671 AD
Jacquard's Loom >>>           Joseph Marie Jacquard in 1801 AD
Difference Engine >>>         Charles Babbage in 1822
Analytical Engine >>>          Charles Babbage in 1833
Tabulating Machine >>>       Dr. Herman Hollerith in 1887
Mark I                      >>>       Howard Aiken in 1937
Atanasoft Berry Computer >>> Dr John Vincent Atanasoft and Clifford Berry in 1942 AD

Q.2. Fill in the blanks with suitable words.
a) Abacus was developed by the Chinese and Egyptian around 3000 BC.
b) Blaise pascal, a French mathematician invented the first mechanical calculating device called Pascaline.
c) Gottfried Wilhelm Von Leibniz, invented digital mechanical calculator called Stepped Recokner.
d) Joseph Marie Jacquard invented an automatic weaving machine called Jacquard's Loom.
e) Charles Babbage is also known as the father of modern computer science.
f) Lady Augusta Ada Lovelace was the first computer programmer who developed first computer program for Analytical Engine.
g) Dr. Herman Hollerith developed Tabulating Machine in 1887.
h) Government of Nepal brought IMB 1401 to process census data of 2028.

Q.3. Complete the following chart of generation of computer with duration and main component used in each generation.

Generation	Period	Main Components
First Generation	1945-1955	Vacuum Tube
Second Generation	1956-1964	Transistors
Third Generation	1965-1971	Integrated Circuits
Fourth Generation	1972-Present	Micro Processor
Fifth Generation	Future	Bio Chips

Q.5. Write the full forms of the following.

ASCC >> Automatic Sequence Controlled Calculator

CDC >>  Curriculum Development Center

HLCIT >> High Level Commission for Information Technology

IT >>  Information Technology

IBM >>  International Business Machine

GUI >>  Graphical User Interface

AI >>  Artificial Intelligence

IC >>  Integrated Circuit

EDSAC >>  Electronic Delay Storage Automatic Calculator

NCC >>  National Computer Center

ABC >> Atanasoft Berry Computer

Q.7. write very short answer of the following question
a. Who is considered as the father of Computer Science?
Ans: Charles Babbage is considered as the father of computer science.
b. Which generation computer used microprocessor as main component?
Ans: Fourth Generation computer used microprocessor as main component.
c. In which university did Howard Aiken belong to?
Ans: Howard Aiken belong to Harvard University.
d. Who was Dr Herman Hollerith?
Ans: Dr. Herman Hollerith was an American census statistician who developed Tabulating machine.
e. What was the main purpose of Napier's bone?
Ans: The main purpose of Napier's bone is to perform calculation of any number.
f. Which generation computer can take self decision?
Ans: Fifth generation computer can take self decision.
g. Which generation of computer used GUI operating system?
Ans: Fourth generation of computer used GUI operating system.
h. Is IBM 1401 minicomputer?
Ans: No, IBM 1401 is a mainframe computer.
i. Who is known as the first computer programmer?
Ans: Lady Augusta Ada Lovelace is known as the first computer programmer.
j. Write the major component used in each generation of computer.
Ans: is given in Q.No. 3.

Q.8. Write short answer of the following question.
a. What is Abacus? What was its main purpose in early days?
Ans: Abacus is the first manual calculating device developed by Chinese and Egyptian around 3000 BC.
The main purpose of abacus in early days was to make their calculation fast and easier.
b. Why is Charles Babbage known as father of computer science?
Ans: Charles Babbage is known as father of computer science because he gave the basic concept of computer in analytical engine.
c. Which is the first computer brought in Nepal and for what purpose?
Ans: IBM 1401 was the first computer brought in Nepal to process census data of 2028.
d. Write about the History of Computer in Nepal in brief.
Ans: There is no any remarkable contribution of Nepal for the development of computer. Nepal has lately entered in the computer age. The first computer IBM 1401 was brought in Nepal for the census of 2028 B.S. In 2031 B.S. His majesty's government established a separate branch named Data Processing Center for the electronic data processing purpose. In 2037 B.S. NCC (National Computer Center) started to provide necessary training and technical support. ICL2950/10 was bought to process the census of 2038.
 Government has formed High Level Commission for Information Technology and also formulated IT (Information Technology) in 2057. Cyber law was released in 2061 and reviewed in 2063 B.S. Now The private level organizations and government are playing important role for the development of ICT in Nepal. e. What is meant by generations of computer?
Ans: The development of modern computers took place into five distinct phases which are known as generations of computer.
f. Write any major features of second generation computer?
Ans: The major features of second generation computer are as follows.
i) Second generation computers used transistors for circuitry.
ii) Second generation computers used magnetic disk and magnetic tape for storage.
iii) Second generation computers were smaller, faster and cheaper then first generation computer.
g. Mention any two disadvantages of first generation computers.
Ans: Two disadvantages of first generation computers are as follows:
i) First generation computers were large in size and slow in speed.
ii) First generation computer required a large amount of electricity to operate and generated a large amount of heat.
h. What is meant by Artificial Intelligence?
Ans: Artificial Intelligence (AI) means the endowing of machines with some of the characteristics of intelligence, such as learning, recognition and reasoning normally associated with humans.
i. Write the difference between third and fourth generation computers.


Q.9. Write short Notes on the following.
a. Analytical engine
b. Pascaline
c. Jacquard's Loom
d. Atanasoff Berry Computer
e. Abacus

 

 

Types of Computer

 

 

Types of Computer

Q.6. Write very short answer of the following questions.

a) Which computer can perform the single dedicated task?
Ans: Analog Computer can perform the single dedicated task.

b) Which computer can perform the function of both analog and digital device?
Ans: Hybrid Computer can perform the function of both analog and digital device.

c) Which company introduced the first minicomputer in 1960?
Ans: Digital Equipment Corporation (DEC) introduced the first minicomputer in 1960. 

d) Is laptop, mainframe computer?
Ans: No, laptop is not mainframe computer.

e) Which computer can be used where there is no regular electricity?
Ans: Laptop computer can be used where there is no regular electricity.

f) In which type of computer parallel processing is possible?
Ans: Parallel processing is possible in Super Computer.

g) What is micro computer?
Ans: Micro computer, also known as Personal Computer is a small computer with a microprocessor as its central processing unit (CPU).

h) Write the example of mainframe and minicomputer?
Ans: IBM S/3909 is the example of mainframe and PDP-11 is the example of minicomputer.

 

Q.7. Write short answer of the following questions:

a) What is the difference between general purpose computer and special purpose computer?
Ans:

Difference between general purpose computers and special purpose computers are given below: 

General Purpose Computer	Special Purpose Computer
General purpose computers are designed to perform more than one task.	Special purpose computers are designed to perform single task.
Different Programs can be installed according to the users need like games, drawing, word processor programs etc.	Programs are loaded during the manufacturing time and user cannot change or add programs.
Example : Personal computer, Laptops, Notebooks etc	Example : Washing machine, self driven car, Telephone billing system etc.

 

b) Why is an analog computer called special purpose computer?
Ans: Analog computer solve problems by using continuously changing data and continuously data are obtained by measuring so it can only perform single task. Programs are also loaded during the manufacturing time so these computer are also known as special purpose computer. 

c) Why are digital computers more popular these days?
Ans: Digital computer solve problems by using discrete data. Discrete data are obtain by counting so it produce more accurate value than analog computer. It is also designed to perform more than one task so digital computers are more popular these days. 

d) How is hybrid computer used in hospitals?
Ans: Hybrid computer process both continuous and discrete data it means it can perform the works done by analog computer as well as digital computer because of this features Hybrid computer are used in hospitals.

e) Mention the types of micro computer.
Ans: Micro computer are divided into three types:
i) Desktop computer
ii) Laptop computer
iii) Handheld computer

f) Distinguish between desktop computer and laptop computer.
Ans: Different between desktop computer and laptop computer:

Desktop Computer	Laptop Computer
1. It is bigger in size and designed to be fitted on desk.	1. It is smaller in size and fitted inside a briefcase.
2. Desktop needs basic external devices like mouse, keyboard, monitor etc to be fully functional	2. Laptop has all necessary devices built-in, making it the most portable.
3. Desktop computer can only run off the main powers.	3. Laptop computer can run off AC power, batteries, or mains power.

g) What are handheld computers? Write its types.

Ans: Handheld computer is an electronic computing device which is compact and portable enough to be held and used in one or both hands. It is also known as palmtop computer.

Types of handheld computers are:

i) Personal Digital Assistance (PDA)

ii) Cellular Phone

iii) H/Pc Pro device

h) What is a mini computer? Write the use of mini computers.
Ans: Mini computers are more powerful, larger in size, have higher processing speed and expensive than microcomputers. These computer are used as server in network and also used in business, education and many other field. PDP-11 is the example of mini computer.

i) What is a mainframe computer? Where is it mainly used?
Ans: Mainframe computers are more powerful, larger in size, have higher processing speed and expensive than minicomputers. It also required a large room with air conditioner because it produce more heat. It is mainly used as servers on the World Wide Web. It is also used in large organization like Banks, Aeroplanes, Universities etc. IBM S/3909, CDC 6600 are the example of Mainframe computer. 

j) What are the applications of super computer? Write any four of them.
Ans: Super computer are the most powerful and largest computer with highest processing speed. It is also most expensive computer which can solve complicated scientific problems. It has large number of processors connected parallel so parallel processing is possible in this computer.
Application field of super computer are:
a) Weather forecasting
b) Online banking
c) Nuclear energy research
d) Aircraft design
e) Control industrial units.
k) Prepare a chart to show the classification of digital computer.

 

 

 

Computer Hardware and Software

 

Computer Hardware and Software
 Write very short answer of the following questions.
a) What is computer hardware?
Ans: All the physical parts of a computer that can be touched, seen and felt are called hardware.
b) Which device is known as pointing input device?
Ans: Mouse is known as pointing input device.
c) Write one example of system software.
Ans: Windows is the example of system software.
d) Which type of storage device is better in technology between magnetic and optical?
Ans: Magnetic storage device is better in technology between magnetic and optical.

e) What type of software are compiler and interpreter?

Ans: Compiler and interpreter are Language processor software.
f) What are the types of application software?
Ans: Tailored software and general software are the types of application software.
g) Write any two example of printer.
Ans: Inkjet printer and Dot matrix printer are the two examples of printer.
h) Is scanner peripheral device?
Ans: Yes scanner is peripheral device.
i) What is meant by firmware?
Ans: Firmware is the permanent software programmed into a read-only memory.

Write short answer of the following questions.
a) List any four common hardware devices?
Ans: Monitor, Keyboard, Mouse, System unit are the four common hardware device of computer.
b) What are the different types of computer hardware?
Ans: The different types of computer hardware are:
i) Input Hardware :  Eg. Mouse, Keyboard, Scanner, Joystick etc.
ii) Processing Hardware : Eg. CPU
iii)  Output Hardware : Printer, Monitor, Speaker, Plotters, Projector etc.
iv) Memory and storage hardware: Eg. RAM, ROM, Hard disk, Pen-drive etc.
c) What are input devices? Write with examples.
Ans: The devices that are used to enter data and instructions or commands into the computer are called input devices. Eg. Mouse, Keyboard, Scanner, Joystick etc.
d) What are output devices? write with examples.
Ans: The devices that are used to get processed result or output from the computer are called output devices. Eg. Printer, Monitor, Speaker, Plotters, Projector etc.
e) What is the main function of processing unit.
Ans: The main function of processing unit are:
i) It manages all the resources of the computer.
ii) It executes programs instructions.
iii) It makes decisions.
iv) It performs calculations and tells other parts of computer what to do.
f) What is memory in computer? Write the types of main memory.
Ans: Memory also known as primary storage or main memory is the place of computer where program (instructions) and data are stored during the processing. Memory storage are fixed on the motherboard inside the computer. Random Access Memory and Read Only Memory are the types of memory in the computer.
g) Differentiated between RAM and ROM.
Ans:

ROM	RAM
a. It stands for Read only memory.	a. It stands for Random Access Memory
b. It is non volatile or permanent memory.	b. It is volatile or temporary memory.
c. It is startup memory of a computer	c. It is working memory of computer.

h) What are storage devices? Write any two magnetic storage devices.
Ans: The devices that are used to store data, programs and information permanently for the future use are known as storage devices. It can store large amount of data in the computer. There are two types of storage device in the computer.
i) Optical storage device (CD ROM, DVD ROM)
ii) Magnetic Storage device (Floppy Disk, Hard disk,)
i) What is computer software? How do you classify them?
Ans: A set of instructions given to the computer in programming languages to solve problems or to control different operations of the computer is known as computer software. It is the collection of programs which makes computer work.
We can classify software in different types:
System Software (operating software, Language processor, Device driver, Utility software)
Application Software (Tailored software, General software)
j) What is system software? Write its types.
Ans:  System software is a set of programs that control the operations of a computer and peripheral devices attached to the computer. It also create link between computer and user.
operating software, Language processor, Device driver, Utility software are the types of system software.
k) What are the basic tasks performed by system software?
Ans: The basic task performed by system software are given below:
i) Monitoring the use of all the hardware components.
ii) Communicating with peripheral device like printer, webcam etc.
iii) Create links between user and computer.
iv) Managing the files and folders.
v) Running the application software.
l) What is application software? Write some application packages.
Ans: A set of programs that are used to solve particular problems of the user through computer is called application software. These software are created specially according to the user's need.
Some application software packages are:
i) Tailored or customized software: payroll system, banking system etc.
ii) General or packaged software: Word pad, paint, power point etc
m) What is the difference between system software and application software?
Ans: Difference between system software and application software are given below.

System Software	Application Software
1.System software is used for operating computer hardware.	1.Application software is used by user to perform specific task.
2.System software are installed on the computer when operating system is installed.	2.Application software are installed according to user’s requirements.
3.Some examples of system software are compiler, assembler, debugger, driver, etc.	Some examples of application software are word processor, web browser, media player, etc.

 

Operating System (Microsoft Windows 8)

 

Operating System : Microsoft Windows
Q. 5. Write short answer of the following questions.
a. Is windows CUI operating system?
Ans: No, Windows is not CUI based operating system.
b. What are the parts of file name?
Ans: File name has two parts primary name (base name) and secondary name (extension).

c. Which company introduced the Windows operating system?
Ans : Microsoft corporation introduced the windows operating system.
d. What is the main purpose of folder?

Ans: The main purpose of folder is to organize data and information in the computer.
e. Can you delete the selected (highlighted) file by pressing delete key?

Ans: Yes, we can delete the selected (highlighted) file by pressing delete keys.

f. Write two examples of an operating system?

Ans: Ms-windows and Apple's Mac OS are the two examples of an operating system.
g. What is a file?

Ans: Files are the systematic collection of related data and information in the computer.
h. What is recycle bin?

Ans: Recycle Bin is a special folder that contains files and folders that are deleted from the hard disk.
Q.6. Write short answer of the following questions.
a. What are the basic tasks performed by an operating system?

Ans: The basic task performed by an operating system are as follows:

i) It accepts input from input devices.

ii) It sends output to output devices.

iii) It manages the files and folders on the storage devices.

iv) It manage the application programs in memory.

v) It manages and controls the input/output devices.

b. What is Microsoft windows operating system?

Ans: Microsoft windows operating system is the most widely used and most popular operating system software developed by Microsoft corporation USA. It is a Graphical User Interface (GUI) based operating system so we can give command commands to the computer by clicking on icons, menus buttons using mouse.
c. What are different options available in the task-bar properties windows?
Ans: The different options available in the task-bar properties windows are: stop not responding opened program, check performance, speed, start up program etc.
d. What is folder? Write down the names of folders?
Ans: Folder is just like a file cabinet that is used to keep files or we can say that folder in windows operating system is a container that contain multiple documents, different files or sub-folder. Some example of default folder in windows operating system is Recycle Bin and Windows.
e. What are different methods of selecting items?
Ans:
f. What is the use and purpose of File Explorer?

Ans: File Explorer is very useful feature of windows which allows us to see the contents of each drive, folder and libraries in the computer. It also help us to manage files and folder in the computer
g. What is Windows Task Manager?

Ans: Windows Task Manager is special feature of windows which help us to stop not responding opened program, check performance, speed, start up program etc. in the computer.

 

 

Word processing Software (Microsoft Word 2016)

 

Word processing Program
Q.4. Write very short answer of the following questions.
a. Is Ms-Word spreadsheet software?
Ans: No, Ms-Word is not spreadsheet software.
b. Which short cut key is used to select the whole document?
Ans: Ctrl+A is the short cut key to select the whole document.
c. What is the function of undo and redo command?
Ans: The undo command cancels the last action performed on the document and Redo command is used to retrieve the previous task that was cancelled by undo command.
d. Write any two word processing software.
Ans: Ms-word and word star are the two example of word processing software.
e. Write the icon of full justification (alignment)
Ans: The icon of full justification alignment is given below.

f. What is word art? What is the purpose of using it in the document?
Ans: Word art is the artistic display of text in Ms-word. The main purpose of using word art in the document is to add different styles and special effects to the text. It helps to make our document more attractive.
g. What is the extension of Ms-Word document?
Ans: The extension of Ms-Word document is .doc.
# Write short answer of the following questions.
a. Why are word processors necessary for computer users?
Ans: Word processors are necessary to create, edit, view, format and print text document in the computer.
b. What are the advantages of word processor over using a typewriter?
Ans: The main advantages of word processor over using a typewriter is that you can make changes without retyping the entire document.
c. What is Microsoft Word? Write its different versions.
Ans: Microsoft Word is one of the most popular word processing software developed by Microsoft Corporation USA. Ms-Word 2003, Ms-Word 2007, Ms-Word 2010 etc are the different version of Microsoft Word.
d. What are the major components of default Word-2016 window?
Ans: The major components of default Word-2016 window are :
Quick access toolbar, title bar, control buttons, file tab, ribbon, working area, zoom control, status bar, ruler etc.
e. Write any four features of word processing software.
Ans: Four feature of word processing software are as follows:
i) It allows you to type and edit document, letters, reports, brochures etc.
ii) It allows you to format document according to required font type, size and style.
iii) It allows you to copy and move the text easily from one location to another.
iv) It allows you to format page and print document if necessary.
f. What are dialog box launchers?
Ans: Dialog box launchers are the commands that open movable window also known as dialog box that is displayed on screen which has several command options for respective command group.
g. Write some rules while typing text in Ms-Word.
Ans: Some rules while typing text in Ms-Word are:
i) Do not press enter at the end of every line.
ii) Press enter once at the end of every paragraph.
iii)

 

 

Spreadsheet Software (Microsoft Excel 2016)

 

Spreadsheet (Microsoft Excel)
Write Very Short answer of the following question.
a) Is Ms-Excel word processing software?
Ans: No, Ms-Excel is not word processing software.
b) Which was the first electronic spreadsheet software?
Ans: VisiCalc was the first electronic spreadsheet software.
c) Where does status bar lie at Ms-Excel screen?
Ans: Status bar lie in the bottom of Ms-Excel screen window.
d) Which symbol is used to begin formula in Ms-Excel?
Ans: An equal to (=) symbol is used to begin formula in Ms-Excel.
e) Which shortcut keys are used to save and close the worksheet?
Ans: Ctrl+s shortcut key to save and Ctrl+w shortcut key is used close in the worksheet
f) How can you select an entire worksheet?
Ans: We can select an entire worksheet by pressing Ctrl+A keys from the keyboard.
g) Write the reference operators used in MS-Excel?
Ans: Range operator and Union operator are the reference operators used in MS-Excel.
h) Name the functions that are used to enter data in the cell.
Ans: To enter the data in the cell first you have to select that cell by clicking on it.
i) What is the extension of Excel worksheet?
Ans: The extension of Excel worksheet is dot xls or dot xlsx (.xls or .xlsx)

Write short answer of the following questions:
a) What is an electronic spreadsheet? Give some examples of electronic spreadsheet?
Ans: An electronic spreadsheet is a software that stores data in tabular form that i.e. rows and columns and allows you to calculate and manipulate them according to your requirement. Example: Ms-Excel, VisiCalc, Lotus 1-2-3 etc.
b) What is Microsoft Excel? Write different components of Ms-Excel 2016 window.
Ans: Ms-Excel is one of the popular and widely used spreadsheet software developed by Microsoft Corporation USA.
The different components of Ms-Excel 2016 window are :
File Tab, Quick Access toolbar, Title bar, Ribbon, Formula Bar, Working Area, Status Bar, Sheet Tabs, Worksheet view buttons, Tell me, Zoom control etc.
c) What are different methods of selecting data in the worksheet.
Ans The different methods of selecting data in the worksheet are given below:

d) What is the fill handle? Write its uses.
Ans: Fill handle is a small black square that appears at the bottom right corner of the selected cell. It is used to auto fill list items, to fill custom list etc.
e) What is the use of Auto fill feature?
Ans: Auto fill feature in Ms-Excel is used to automatically copy cells and fill them with a series without using copy command.
f) What are different operators used in Excel?
Ans: The different operators used in Excel are:
i) Arithmetic Operators                   ii) Relational or Comparison Operators
iii) Reference Operators                  iv) Logical Operators
v) Text Operators
g) What are the rules of using formula in Excel?
Ans: Rules for using formula in Excel are given below:
i) The formula always must begin with an equal sign (=)
ii) After inserting formula, press Enter key to confirm it.
iii) The formula are not case sensitive.
iv) The cell address also can be used in the formula. Eg. (A2+B2)*F5
v) The references, constants, operators and functions can be used in formula.
h) What is chart? Write its importance.
Ans: Charts are graphical presentation of numeric data in the worksheet. Charts are based on data contained in worksheets and it helps to observe and compare different data in the worksheet.

 

Presentation Software (Microsoft PowerPoint)

 

Presentation Software (Ms-Power Point
Write very short answer of the following questions:
a) What type of software is Ms-Power Point?
Ans: Ms-Power Point is a Presentation software.
b) What is the purpose of Presentation.
Ans: Presentation is used to display information in an effective manner normally in the form of slide show.
c. Write any two presentation software.
Ans: Two example of presentation software are Power Point,
d. When did Microsoft released Ms-Power Point 2016.
Ans: Microsoft released PowerPoint-2016 in September 2015
e. What is the extension of Power Point presentation?
Ans: The extension of power point presentation is dot ppt (.ppt).
Write short answer of the following questions:
a) Write any Four features of Ms-PowerPoint.
Ans: The main four features of Ms-PowerPoint are as follows:
i) It allows to create, modify and print different types of presentations.
ii) It allows to work on more than two text box
iii) It supports multimedia system with animation.
iv) It supports object linking and embedding.
b) What is presentation software?
Ans: Presentation software is a special type of software used to create and display information in an effective manner normally in the form of slide show.
c) What is Ms-PowerPoint? Explain different components of PowerPoint.
Ans: Ms-PowerPoint is the most popular presentation software that allows to create, modify and display presentation. It was developed by Microsoft Corporation USA. The different components of PowerPoint are: Title Bar, Menu Bar Slide Pane, Slide Tab, Status Bar, Zoom Controls, Office Tab, Quick Access Toolbar, Ribbon etc.
d) What is a slide? How do you show the slide?
Ans: There may be several pages in a presentation which contain text, pictures, Graphics, Sound, animation and even videos.  Each page of presentation is called slide.
To start the slide show you can press F5 key form the keyboard.
e) What are the different view options available in PowerPoint?
Ans: The different view options available in PowerPoint are: Normal View, Shorter View, Slide show View, Reading View.
f) What is the use of Animation Effect in PowerPoint?
Ans: Animation Effect in PowerPoint is used to make our presentation more attractive, effective and lively.
g) How can you add Transaction Effect in your presentation?
Ans: To add Transaction Effect in presentation first of all select the slides and click on the transition tab. You can see many transition effects by clicking on the more button select desired animation effects according to your needs.

 

ICT Tools And Cyber Ethics

 

 

 Chapter  10 ICT Tools and Cyber Ethics 

a. Is video conferencing a means of ICT?

Ans: Yes video conferencing means of ICT.

b. Give one example of ICT in the Banking sector.

Ans: Electronic banking system provides 24-hour services using ICT. 

c. Write any two common hardware tools used in ICT. 

Ans: Any two common hardware tools used in ICT are: Web Camera, Scanner. 

d. Mention any two software used as ICT tools.

Ans: Any two software used as ICT tools are: Presentation software, Multimedia software.

e. Is pornography, Computer ethics?

Ans: Yes pornography is computer ethics.

f. Give one issue concerned with computer ethics. 

Ans: pornography/software piracy is the one example concerned with computer ethics. 

 Write short answers to the following questions.

a. What is ICT? Write the uses of ICT in any four fields.

Ans: ICT is a set of technological tools and resources used to communicate, create, disseminate, store and manage information. 

The uses of ICT in any four fields are:

i) Education ii) Banking     iii) Industry          iv) E-Commerce

b. What is an ICT tool? List some hardware used as ICT tools.

Ans: ICT tools are the devices, objects, and software used for storing, accessing, sharing, and communicating information worldwide. Some hardware used as ICT tools are Scanner, Pendrive, Microphone, Web camera, Digital camera, etc.

c. What is cybercrime? List any 4 cybercrimes.

Ans: Cyber crimes are criminal activities done using the computer, internet, and other electronic devices. Four cyber crimes are: hacking, pornography, software piracy, privacy discloser etc.

d. List any four commandments of computer ethics.

Ans: Four commandments of computer ethics are:

1. You should not use a computer to harm other people

2. You should not interfere with other people's computer work.

3. You should not snoop around in other people's computer files.

4. you should not use a computer to seal data and information.

e. What is cyber ethics?

Ans: Cyber ethics is the philosophic study of ethics pertaining to computer networks, the internet, and other electronic devices, encompassing user behavior about what to do and how this will affect individuals and society.

 

Computer Virus and Its Remedy

 

6. Write short answer of the following questions.
a) Define computer Virus in your own words.
Ans: Computer Virus is a software program capable of reproducing itself and capable of causing great harm of files to files or other programs on the computer system.
b) Write any four symptoms of computer virus.
Ans: Four symptoms of computer virus are as follows:
 i) Viruses slow down computer speed.
ii) Viruses show unusual error message on computer screen.
iii) Viruses reduce the memory space of computer.
iv) Computer take long time to boot.
c) Mention any four preventive measures from computer viruses.
Ans: Four preventive measures from computer viruses are as follows:
i) Install latest and updated anti-virus software and scan computers regularly
ii) Protect your computer system by using strong password
iii) Avoid using the pirated software.
iv) Before using the external disk, scan it.
d) What are the means of spreading computer virus?
Ans: The means of spreading computer virus are Internet, E-mail, Pen-drive, External Hard disk, Pirated software and game etc.
e) What is the purpose of antivirus software?
Ans: Antivirus is used to prevent, detect and remove computer virus from the computer.

 

Computer Network and the Internet

 

 

 

Computer Graphics

 

Class 7 Chapter 13 Computer Graphics,
Q.5. Write very short answers to the following questions.

a. Is freehand page layout software?
Ans: Yes freehand is page layout software.
b. Which tool in Photoshop is used to set opposite colors?
Ans: Toggle colors tools are used to set the opposite color in Photoshop.
c. Page layout software is useful for printing books. Yes or No?
Ans: Yes Page layout software is useful for printing books.
d. Which company designed In design software?
Ans: Adobe Company designed In design software.
e. Which Group of In design tools is used to change the size of an image?
Ans: Transformation tools are used to change the size of an image in In design.
f. How can you make the image dim in Photoshop?
Ans: Blur tool is used to make the image dim in Photoshop.

Write short answers to the following questions.

a. What is computer graphics? Classify the types of graphics software.

Ans: Computer graphics is a presentation of news, views, and information in a pictorial form. It is a representation of image data with the help of special graphics hardware and software.

Photo Editing Software and Page layout software are the types of graphics software.

b.What is photo editing? Write any two photo editing software.

Ans: Photo editing is the process of changing and modifying of the image according to the required style and format. Example: Adobe Photoshop, GIMP (Gnu Image Manipulation Program) 

c. What is page layout? Name any two software used for page layout designing.

Ans: Page layout refers to the arrangement of text, images, and another object on a page. Page layout techniques are used to costomise the appearance of magazines, newspaper books, and other types of publications, Examples of page layout software are Freehand, Corel Draw, Adobe Indesign, etc.

d. What is Adobe Photoshop? Write any four features of Photoshop.

Ans: Adobe Photoshop is one of the popular and easy photo editing software for any type of user in the field of graphics design and desktop publishing.

The main features of Photoshop are:

i) It Provides easy and effective photo editing techniques.

ii) It provides varieties of tools for different functions.

iii) It supports 2D to 3D image conversion.

iv) It allows to format and print photos in the desired style.

e. What is Adobe Indesign? Lists its purpose.

Ans: 

 

 

Multimedia and its uses

 

Q.5. Write very short answer to the following questions

a. How many media are included in multimedia?

Ans: Two or more than two media are included in multimedia.

b. Is a sound card a compulsory device for multimedia?

Ans: Yes sound card is the compulsory device for multimedia.

c. Write any two software tools used in multimedia.

Ans: Two software tools used in multimedia are: Word processing software, Photo editor software.

d. Give one software used to view multimedia.

Ans: Windows Media Player is an example to view multimedia.

e. Give one example of educational multimedia.

Ans: Computer Assisted Learning is an example of educational multimedia. 

f. Which special movie is used as entertainment of multimedia?

Ans: Jurassic Park is an example of a special movie that was developed using multimedia technology.

6. Write short answer of the following questions;

a. What is multimedia? List any four application fields of multimedia.

Ans: Multimedia is a combination of text, graphics, sound, animation, and video that is delivered interactively to the user by electronic or digitally manipulated means. 

Any four application fields of multimedia are:

i) Education and Training

ii) Business

iii) Entertainment

iv) Internet and web

b. What are the basic elements of multimedia?

Ans: The basic elements of multimedia are: Text, Graphics, Audio, Animation, Video etc.

c. What is the importance of graphics in multimedia?

Ans: Graphics is used in multimedia to show more clearly what particular information is about. By adding graphics, you can explain your presentation through illustrations and charts so graphics in multimedia is important. 

 

 

I Introduction to QBASIC Programming Language

 

Write very short answer of the following questions:

a. What is the default extension of QBASIC program file?

Ans: The default extension of QBASIC program file is .BAS.

b. Which short cut key is used to close QBASIC window?

Ans: Alt+F then press x key to close QBASIC window.

c. Is QBASIC a low-level programming language?

Ans: No, QBASIC is not low-level programming language

d. Write any two popular versions of QBASIC.

Ans: Two popular versions of QBASIC are: QBASIC 4.5, QBASIC 6.4

e. In which window of QBASIC do you type the program?

Ans: We used to type the program in the Program window of QBASIC.

5. Write short answers to the following questions.

a. What is QBASIC programming language?

Ans: QBASIC stands for Quick Beginners All-Purpose Symbolic Instruction Code. It is one of the most popular high-level programming languages developed by Microsoft Corporation, USA in 1985 AD.

b. Write any four features of QBASIC.

Ans: Four features of QBASIC are:

QBASIC has many features. Some features of QBASIC are given below.

QBASIC is interpreter based language, so it is easy to debug.

QBASIC checks syntax automatically

QBASIC supports various inbuilt functions.

QBASIC supports modular programming approach.

QBASIC is not case sensitive so, can be used in any case of letters.

c. What is the difference between immediate window and view window?

Ans: Immediate window is a small area located just below the program window. The commands or statements written in this area can be executed immediately by pressing Enter key. 

View window is the largest blank area of the screen where we can type and execute programs. We can execute the program using F5 Keys. 

d. What is meant by running a program?

Ans: Running or executing the program is the process of displaying output on the screen. 

e. Why is QBASIC program easy to debug?

Ans: QBASIC is high level programming language it is simple and easy to understand because it uses English like words and commands so QBASIC program is easy to debug.

 

 

II Elements of QBASIC programming Language.

 

Chapter 16 II 

Elements of QBASIC programming Language.

Write very short answer of the following questions.

a. Give some examples of QBASIC Keywords.

Ans: Some examples of QBASIC keywords are: INPUT, CLS, PRINT, CLS, REM

b. Write one string operator.

Ans: The plus sign (+) is the one example of String Operator.

c. Is NOT a logical Operator?

Ans: Yes NOT is a logical Operator.

d. Is QBASIC case sensitive while programming?

Ans: No QBASIC is not case sensitive while programming. 

e. How many bytes can be stored by double precision numeric variable?

Ans: 8 bytes can be stored by double precision numeric variable. 

f. What type of operator is MOD?

Ans: MOD is Arithmetic operator.

g. Which symbol is used for exponentiation in QBASIC?

Ans:  ^  symbol is used for exponentiation in QBASIC.

h. Is DLS a reserve word in QBASIC?

Ans: No DLS is not reserve word in QBASIC.