Prem-blog: Grade 9: Short Answer Questions

Group – B

4. Answer the following questions. (2 marks)

1) What is computer system? Draw the basic architecture of the computer system.

Ans: A computer system is a combination of hardware and software that works together to process data and perform tasks.

The basic architecture of a computer system includes:

· Input Unit: Receives data (e.g., keyboard, mouse).

· Central Processing Unit (CPU): Processes data (includes ALU and Control Unit).

· Memory Unit: Stores data (RAM, ROM).

· Output Unit: Displays results (e.g., monitor, printer).

2) Write down the main units of the computer system.

Ans: The main units are:

· Input Unit: Accepts data and instructions.

· Central Processing Unit (CPU): The brain of the computer that performs processing.

· Output Unit: Displays or produces the result.

· Memory Unit: Stores data and instructions.

3) List any four characteristics/features of the computer.

Ans: Any four characters of the computer are:

Speed: Computers process data at high speed.

Accuracy: Computers provide accurate results.

Automation: Computers perform tasks automatically.

Storage: Computers can store large amounts of data.

4) Explain the working principle of the computer.

Ans: The working principle of a computer is based on the Input-Process-Output (IPO) cycle.

Input: Takes data and instructions from the user.

Processing: Manipulates the data according to the instructions.

Output: Presents the processed results to the user.

5) What is microprocessor? How does it work? Explain.

Ans: A microprocessor is a computer processor on a single integrated circuit. It's the "brain" of the computer.

It works by fetching instructions from memory, decoding them, then executing them and sending the results to memory or output devices. It contains the ALU, CU, and registers.

6) What is a motherboard? What does it contain?

Ans: A motherboard is the main circuit board of a computer. It contains:

· CPU

· RAM

· ROM

· Expansion slots

· Connectors for peripherals

7) Write two limitations of the computer.

Ans: Two limitations of the computer are:

· Lack of decision-making ability.

· Dependence on human input.

8) Mention the functions performed by ALU?

Ans: The Arithmetic and Logic Unit (ALU) performs arithmetic operations (addition, subtraction, etc.) and logic operations (AND, OR, NOT).

9) Why is computer called a versatile machine?

Ans: The computer is called a versatile machine because it can perform various tasks like calculations, word processing, gaming, and more without losing its accuracy and speed.

10) Why computer is called a diligence machine?

Ans: Computer is called a diligence machine because it can perform the same task repeatedly without getting tired or making errors.

11) What are the applications areas of computer? Explain in brief.

Ans: The applications areas of computer are:

Education: Computers are used in learning and teaching.

Business: For accounting, management, etc.

Healthcare: For medical records, diagnostics, etc.

Entertainment: For games, movies, and media.

12) Differentiate between analog and digital computer.

Ans: Differences between analog and digital computer are:

Analog computer	Digital computer
Analog computers work on continuous values.	Digital computers work on discrete values.
Analog computers have low memory.	Digital computers have a very large memory.
Analog computers provide less accurate results.	Digital computers provide 100% accurate results.
Examples: thermometer, analog clock, speedometer, etc.	Examples: Personal computer, laptops, smart phones, etc.

13) Define digital computer. What are the types of digital computer?

Ans: A digital computer is a system that processes data and instructions using binary codes (0s and 1s) at high speed, performing functions like input, storage, control, processing, and output.

The types of digital computer are:

· Microcomputers

· Minicomputers

· Mainframe computers

· Supercomputers

14) What is a hybrid computer? How is it used in hospitals?

Ans: A hybrid computer combines features of both analog and digital computers. It used in hospitals for monitoring patients and to process real-time data from medical devices like ECGs, and ultrasound machines, allowing for efficient analysis and display of vital signs and images.

15) Differentiate between hardware and software.

Ans: Differences between hardware and software:

Hardware	Software
Hardware is a physical part of the computer.	Software is the program which is executed by CPU.
It can be touched.	It cannot be touched
Hardware can't perform any task without software.	Software can't be executed without hardware.
Examples: keyboard, mouse, etc.	Examples: OS, MS-Word, etc.

16) What is computer software? What are the two main types of computer software?

Ans: Computer software is a set of instructions that tell the computer what to do. The two main types are System software and Application software.

17) Differentiate between compiler and interpreter.

Ans: differences between compiler and interpreter:

Compiler	Interpreter
A compiler translates the entire source code in a single run.	An interpreter translates the entire source code line by line.
It consumes less time.	It consumes more time than compiler.
Error raises after reading the whole program.	Errors raises after reading each line, if any.
Examples: C, C++, etc.	Examples: QBasic

18) List any four input and output devices.

Ans: Any four input and output devices are:

Input devices: Keyboard, Mouse, Scanner, Microphone.

Output devices: Monitor, Printer, Speaker, Projector.

19) State the different units of storage in the computer.

Ans: The different units of storage in the computer are:

Bit: The smallest unit.

Byte: 8 bits.

Kilobyte (KB): 1,024 bytes.

Megabyte (MB): 1,024 KB.

Gigabyte (GB): 1,024 MB.

Terabyte (TB): 1,024 GB.

20) Differentiate between primary and secondary memory with examples.

Ans: Difference between Primary and secondary memory are:

Primary Memory	Secondary Memory
It is volatile in nature.	It is non-volatile in nature.
This memory has fast access time.	This memory has low access time.
It is expensive.	It is inexpensive.
Data can be directly accessed by the CPU.	Data can not be directly accessed by the CPU.
Examples: RAM and ROM	Examples: Magnetic disk, magnetic tapes, etc.

21) Why is RAM called a volatile memory device?

Ans: RAM (Random Access Memory) is volatile because it loses all data when the power is turned off.

22) Why ROM is called a non-volatile memory device?

Ans: ROM (Read-Only Memory) is non-volatile because it retains data even when the power is off.

23) Differentiate between RAM and ROM.

Ans: Differences between RAM and ROM :

RAM	ROM
RAM stands for Random Access Memory.	ROM stands for Read Only Memory.
It allows both read and write operations.	It allows only read operation.
It is volatile in nature.	It is non-volatile in nature.
The instructions are written into the RAM att the time of execution.	The instructions are written into the ROM at manufacturing time.

24) Define memory with its types.

Ans: Memory refers to the electronic components to store data and instructions that can be accessed quickly by the processor. Its types are:

Primary memory (RAM, ROM)

Secondary memory (Hard drive, SSD)

25) Why is secondary memory used for future storage? Explain its types.

Ans: Secondary memory used for future storage because it is non-volatile and can store large amounts of data. Its types are Hard disk drive (HDD), Solid-state drive (SSD), Optical drives (CD/DVD/Blu-ray), USB flash drives.

26) Differentiate between impact and non-impact printer.

Ans: Difference between impact and non-impact printer:

Impact Printer	Non-impact Printer
It prints characters or images by striking print hammer or wheel against an inked ribbon.	It prints characters and images without striking the papers.
Its printing quality lower.	Its printing quality is higher.
It generates noise while printing.	It does not generate noise during printing.
It speed is slower.	It speed is faster.

27) What is operating system? List out the function of the operating system.

Ans: An Operating System (OS) is system software that acts as an interface between the user and the computer hardware. It manages hardware and software resources, provides common services for computer programs, and allows users to interact with the computer.

The functions of operating system are:

· Manages the execution of processes.

· Manages the allocation and deallocation of memory space for processes.

· Manages files and directories on storage devices.

· Protects data and resources from unauthorized access.

28) Explain the operating system with examples.

29) What is search engine? Name two commonly used search engine.

Ans: A search engine is a software program that helps people find the information they are looking for online using keywords or phrases. Two commonly used search engine are Google and Bing.

30) Differentiate between laser and inkjet printer.

Ans: Difference between laser and inkjet printer:

Inkjet Printer	Laser Printer
Inkjet printers uses ink cartridges.	Laser printer use toner cartridges.
Print quality is lower.	Print quality is higher.
It is slower.	It is faster.
It is inexpensive.	It is expensive.

31) What is computer graphics? What is the web graphics format used for the graphics?

Ans: Computer graphics is the creation and manipulation of images using computers. Web graphics formats used for the graphics are JPEG, PNG, GIF, etc.

32) What is computer graphics? List a few application areas of computer graphics.

Ans: Computer graphics is the creation and manipulation of images using computers. Application areas of computer graphics are:

· Gaming

· Animation

· CAD (Computer-Aided Design)

· Medical Imaging

33) What is cloud service? Give any two examples.

Ans: Cloud service is a service provided over the internet, such as storage, computing, or hosting. Two examples are Google Drive and Dropbox.

34) Write any two uses of email.

Ans: Two uses of e-mail are:

· Communication with individuals and groups.

· Sharing documents and files.

35) State any two advantages and disadvantages of e-mail services.

Ans: Advantages:

· Faster mode of communication.

· Send a single message to multiple recipients.

Disadvantages:

· Requires internet connection.

· Source of viruses and spam.

36) What is netiquette? Write any four netiquette rules.

Ans: Netiquette refers to internet guidelines that advise people on how to communicate and treat others when interacting online.

Four Netiquette Rules are:

· Be respectful and considerate of others.

· Avoid sending spam or unsolicited messages.

· Use proper grammar and spelling.

· Respect others' privacy.

37) Differentiate between raster graphics and vector graphics.

Ans: Difference between raster graphics and vector graphics:

Raster Graphics	Vector Graphics
Composed of pixels	Composed of mathematical formulas that define lines, shapes, and curves.
Resolution-dependent	Resolution-independent
Quality reduces when resized	Can be resized without loss of quality
Examples: JPEG, PNG, GIF.	Examples: SVG, AI, EPS.

38) Define package software with two examples.

Ans: Package Software refers to software that is pre-written and designed to be sold to a wide range of users for general use. Examples: MS Office, Adobe Photoshop.

39) What is tailored software? Write with examples.

Ans: Tailored software is custom-designed and developed software for a specific user or organization to meet their unique requirements. Examples: Banking software, Hospital Management System.

40) Why customized software is also called tailored software?

Ans: Customized software is often referred to as tailored software because it is specifically designed or modified to meet the individual needs and preferences of the user or organization.

41) What is application software? Write its types.

Ans: Application Software is software designed to perform specific tasks for the user, such as word processing or spreadsheet calculations. Its Types:

Productivity Software (e.g., Microsoft Office).

Media Players (e.g., VLC Media Player).

Web Browsers (e.g., Google Chrome).

Graphics Software (e.g., Adobe Photoshop).

42) What is wearable computer? List the uses of wearable computers.

Ans: A wearable computer is a small electronic device designed to be worn on the body, providing computing capabilities and connectivity to users. The uses of wearable computers are:

· Fitness tracking

· Health monitoring

· Augmented reality

· Communication.

43) Define utility software with examples.

Ans: Utility Software refers to programs that perform a specific task to help manage or maintain a computer system. Examples: Antivirus Software, Disk Cleanup Tools

44) Write the function of utility software with an example.

Ans: The function of utility software is to optimize the performance and efficiency of the computer system.

Example: Antivirus Software scans the computer for malicious threats and removes them to ensure system security.

45) Differentiate between GUI and CUI.

Ans: Difference between GUI and CUI:

GUI	CUI
GUI stands for Graphical User Interface	CUI stands for Character User Interface.
GUI is very friendly and easy to use.	CUI is very confusing and difficult to use.
In GUI more than one task can run at same time.	In CUI, only one can run at a time.
Examples: Windows, Linux	Examples: MS-DOS

46) Differentiate between high-level and machine-level language.

Ans: Difference between high-level and machine-level language:

Machine-level language	High-level language
Machine language consists of binary code (only 0s and 1s).	It consists of English like statement.
It is directly executed by a computer.	It needs compiler/interpreter to convert into machine language.
Processor dependent	Processor Independent
It needs less execution time.	It needs more execution time.

47) Define web server and social media.

Ans: Web server is a a computer system that stores website files and delivers them to users' web browsers upon request.

Social media is an online platforms that enable users to create, share, and exchange information, ideas, and interests.

48) Define webpage and website.

Ans: Webpage is a single document or page on the internet.

Website is a collection of related webpages, images, and other files hosted on a web server.

49) What is a web browser? List any two web browsers.

Ans: A web browser is a software application used to access and view websites on the internet. Two browsers are : Google Chrome and Mozilla Firefox

50) What is hyperlink?

Ans: A Hyperlink is a clickable link in a webpage that directs users to another page or resource on the web when clicked.

51) What is HTML? List out any two advantages of HTML.

Ans: HTML (Hypertext Markup Language) is the standard markup language used to create and design webpages.

Two advantages are:

· Widely supported by all web browsers.

· Easy to learn and use.

52) What is a marquee in HTML?

Ans: A Marquee in HTML is an element used to create scrolling text or images across the webpage.

53) Differentiate between cell spacing and cell padding in HTML.

Ans: Difference between cell spacing and cell padding in HTML:

Cell Spacing	Cell Padding
The space between the borders of table cells.	The space between the content of a table cell and its border.

54) Is it possible to give a background to the webpage? If yes, then how?

Ans: Yes, it is possible to give a background to the webpage by using <body bgcolor="color"> or CSS background property.

55) Differentiate between empty and container tags with examples.

Ans: Difference between empty and container tags:

Empty Tag (Paired Tag)	Container Tag (Singular Tag)
Tags that do not require a closing tag.	Tags that require both an opening and closing tag.
Example: <br>, <img>, <hr>.	Example: <html>, <body>, <p>.

56) What are pair tags? Give two examples.

Ans: Pair tags are HTML tags that come in pairs, with an opening tag and a closing tag.

Examples:

· ……… (bold)

· <h1>………</h1> (heading)

57) What is CSS? What are the advantages of using CSS?

Ans: CSS (Cascading Style Sheets) is a style sheet language used for describing the presentation of a document written in a markup language like HTML.

Advantages:

· Separates content from presentation.

· Provides more control over the appearance of web pages.

58) Define the role of CSS in web design.

Ans: CSS controls the layout, appearance, and visual presentation of a website, including colors, fonts, spacing, and positioning of elements.

59) What is CSS background? List a few CSS background properties.

Ans: CSS background properties control the background appearance of HTML elements.

CSS Background Properties:

o background-color

o background-image

o background-position

60) Write the purpose and syntaxes of the following HTML tags.

a. <TD> : Defines a cell in a table. Syntax: <td>Content</td>

b. <TR> : Defines a row in a table. Syntax: <tr>...</tr>

c. <HEAD> : Contains metadata about the HTML document. Syntax: <head>...</head>

d.  : Defines a paragraph. Syntax: Paragraph text

e.   : Inserts a line break. Syntax:

f. <A> : Defines a hyperlink. Syntax: <a href="url">Link text</a>

g.  : Defines underlined text. Syntax: Underlined text

h.  : Defines superscript text. Syntax: Superscript text

i.  : Defines subscript text. Syntax: Subscript text

j.  : Defines italic text. Syntax: Italic text

k. <TABLE> : Defines a table. Syntax: <table>...</table>

l. <BGCOLOR> : Sets the background color. Syntax: <body bgcolor="lightblue">...</body>

m.  : Aligns text in a paragraph. Syntax: Centered text

n. <FORM> : Defines an HTML form. Syntax: <form>...</form>

o. <CENTER> : Centers content. Syntax: <center>Centered text</center>

p. <TITLE> : Sets the title of the webpage. Syntax: <title>Title of the page</title>

q. <H1> : Defines heading level 1. Syntax: <h1>Header 1</h1>

r.  : Defines font size, color, and family. Syntax: Red text

61) Write down the HTML code for the following tasks:

i) Make bold your school's name.

Shree Gauri Shankar Secondary School

ii) Change the background colour.

iii) 2K + H2SO4

2K + H2SO4

iv) To draw a horizontal line across the page.

<hr>

v) To create animation effects.

<marquee>Scrolling Text</marquee>

vi) To head, or prologue, of the HTML document.

<head>

<title>Document Title</title>

</head>

vii) Used to change the size of the font.

This is a larger text

viii) Define underlined text.

Underlined Text

ix) To make bold and italic to your address.

Nijgadh-8, Bara

x) Scroll the text "Nepal" with yellow colour background.

<marquee bgcolor="yellow">Nepal</marquee>

xi) Insert image file ("book.gif") with dimension 400 x 500.

xii) Create a horizontal line on the page.

<hr>

xiii) Used to separate text into different paragraphs.

This is a paragraph.

This is another paragraph.

xix) (a2 – b2) – a3

(a2 - b2) - a3

xx) Creates a list of items.

<ul>

</ul>

xxi) Defines an italic text.

Italic Text

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Friday, March 14, 2025

Grade 9: Short Answer Questions

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