Class 9 Computer Science Annual Exam Question Paper 2025

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Class 9 Computer Science Annual Exam Question Paper 2025

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Introduction: Class 9 Computer Science Annual Exam Question Paper

Welcome to our comprehensive resource for the Class 9 Computer Science Annual Exam Question Paper. In this post, we have detailed the complete answer sheet designed to assist students in understanding key concepts and exam strategies. Whether you’re revising for your upcoming exams or looking to deepen your grasp of computer science fundamentals, this guide offers clear explanations and step-by-step solutions. Our aim is to make complex topics accessible, helping you build confidence and improve your performance in school assessments. Dive in to explore each section—from multiple-choice questions and fill-in-the-blanks to detailed programming examples—and get ready to excel in your computer science studies.

Choose the correct option: (1 × 3 = 3)

(a) Which one of the following is a special-purpose application software?

  1. Word-processing software
  2. Operating system software
  3. Compiler
  4. Payroll system

Ans: (i) Payroll system: A payroll system is designed specifically to manage employee payment processes, making it a special-purpose application software.

(b) Which of the following is not a protocol?

  1. HTTP
  2. HTTPS
  3. ISP
  4. FTP

Ans: (iii) ISP: An Internet Service Provider (ISP) is a company that provides Internet access to users and is not a protocol.

(c) A network switch is required to form:

  1. Star Topology
  2. Mesh Topology
  3. Ring Topology
  4. Bus Topology

Ans: (iv) Star Topology: In a star topology, each device is connected to a central network switch, which manages data transmission.

2. Fill in the blanks: (1 × 3 = 3)

(a) Raw data is processed by the computer to produce information.

(b) Unix was originally developed in 1969 by a group of AT&T employees.

(c) Software piracy refers to the unauthorized duplication of computer software.

3. Write T for true and F for false. (1 × 3 = 3)

(a) Pen drives use flash memory to store data. (T/F)

Ans: True (T)

(b) Microsoft Windows has 15 versions since its first release in 1985. (T/F)

Ans: False(F)

(c) Purchasing only one licensed copy of the software and distributing/loading it onto multiple systems is called software piracy.

Ans: Software piracy.

4. Short Answer Questions

(a) Define memory unit.
A memory unit is a component within a computer used for storing data and instructions temporarily (as in RAM) or permanently (as in hard drives or SSDs).

(b) Define Utility Software.
Utility software comprises programs designed to help manage, maintain, and control computer resources. They perform tasks such as file management, system diagnostics, and disk cleanup.

(c) What is network topology?
Network topology refers to the arrangement or layout of various elements (nodes and links) in a computer network, dictating how devices are interconnected and communicate with each other.

(d) What is a search engine?
A search engine is a software system that indexes and retrieves information from the web in response to user queries, helping users find relevant content online.

(e) Define WiMAX technology.
WiMAX (Worldwide Interoperability for Microwave Access) is a wireless communication standard designed to provide high-speed internet access over long distances, typically serving as a last-mile broadband solution.

(f) Define intellectual property.
Intellectual property covers creations of the mind—such as inventions, literary and artistic works, designs, symbols, names, and images—granted legal protection to encourage innovation and creativity.

(g) What is Mosaic Plagiarism?
Mosaic plagiarism involves piecing together ideas, phrases, or sentences from one or more sources without proper attribution, even if the text is slightly altered. It’s considered unethical because it presents someone else’s work as one’s own.

(h) Define Candidate Key.
In a relational database, a candidate key is a set of one or more fields that can uniquely identify a record. A table may have multiple candidate keys, any of which could serve as the primary key.

5. Technical and Conversion Questions

(a) Convert (1032.6875)₁₀ to Octal.

  • Process:
    • Integer part:
      • 1032 ÷ 8 = 129 with remainder 0
      • 129 ÷ 8 = 16 with remainder 1
      • 16 ÷ 8 = 2 with remainder 0
      • 2 ÷ 8 = 0 with remainder 2
      • Reading remainders from last to first gives: 2 0 1 0
    • Fractional part:
      • 0.6875 × 8 = 5.5 → digit = 5
      • 0.5 × 8 = 4.0 → digit = 4
  • Answer: (1032.6875)₁₀ = (2010.54)₈

(b) Convert (960)₁₀ to Hexadecimal.

  • Process:
    • 960 ÷ 16 = 60 with remainder 0
    • 60 ÷ 16 = 3 with remainder 12 (12 is represented as C)
    • 3 ÷ 16 = 0 with remainder 3
  • Answer: (960)₁₀ = 3C0

(c) Define Control Unit and Registers.

  • Control Unit: The control unit is the part of the CPU that directs the operation of the processor. It interprets program instructions and controls the flow of data within the computer.
  • Registers: Registers are small, high-speed storage locations within the CPU that temporarily hold data, instructions, and addresses during processing.

(d) Define Real-Time OS and Time-Sharing OS.

  • Real-Time OS (RTOS): An RTOS processes data as it arrives, ensuring that critical tasks are completed within strict time constraints. This is vital for applications like industrial automation and embedded systems.
  • Time-Sharing OS: A time-sharing OS allows multiple users to share system resources simultaneously by rapidly switching between tasks, giving the impression of concurrent processing.

(e) Give an example of a URL and describe its different sections.

  • Example: https://www.example.com:8080/path/page.html?query=123#section2
  • Sections:
    • Protocol: https – indicates the secure communication method.
    • Domain Name: www.example.com – identifies the website’s server.
    • Port Number: :8080 – specifies the network port used for the connection.
    • Path: /path/page.html – indicates the location of the resource on the server.
    • Query: ?query=123 – provides parameters for dynamic content.
    • Fragment: #section2 – points to a specific section within the page.

(f) Differentiate between a Hacker and a Cracker.

  • Hacker: Often refers to a person who enjoys understanding and experimenting with computer systems, sometimes to improve security. The term can have positive connotations when used in the context of ethical hacking.
  • Cracker: Refers to someone who breaks into computer systems or circumvents software protections for malicious purposes.

(g) Explain the different views of a table.
In a database, a table can be visualized through multiple views:

  • Datasheet View: Displays data in rows and columns, allowing users to view and edit records directly.
  • Design View: Provides a structured view of the table’s schema, including field names, data types, and constraints.

(h) Define Programming and Explain Its Importance.

  • Definition: Programming is the process of writing a series of instructions (code) that a computer can execute to perform specific tasks or solve problems.
  • Importance: It enables automation, facilitates problem-solving, and underpins the development of software applications essential for modern technology.

(i) Define Flowchart and Pseudocode.

  • Flowchart: A visual diagram that represents the sequence of steps in an algorithm or process, using standardized symbols to denote different operations.
  • Pseudocode: A high-level, plain-language description of an algorithm that outlines its logic without the strict syntax of a programming language.

(j) What is a Header File and Built-in Function?

  • Header File: In programming (especially in C/C++), a header file contains declarations of functions, macros, and data types which can be included in multiple source files to share common definitions.
  • Built-in Function: These are functions provided by a programming language or its standard library that perform common tasks, eliminating the need for users to write them from scratch.

(k) Define Artificial Intelligence and Machine Learning.

  • Artificial Intelligence (AI): AI is the field of computer science focused on creating systems capable of performing tasks that typically require human intelligence, such as decision-making, problem-solving, and language understanding.
  • Machine Learning (ML): A subfield of AI, ML involves developing algorithms that allow computers to learn from and make predictions or decisions based on data.

6. Advanced Questions

(a) What is a wired Internet connection? Mention two types.
A wired Internet connection uses physical cables to transmit data between devices and the network.

  • Examples: Ethernet (using twisted pair or fiber optic cables) and Digital Subscriber Line (DSL).

(b) Write pseudocode for finding the summation of N given numbers.

START
   INPUT N
   SET sum = 0
   FOR i = 1 to N DO
      INPUT number
      sum = sum + number
   END FOR
   OUTPUT sum
END

(c) What is a programmer’s view of memory? Is it different from actual memory? Explain briefly.
A programmer’s view of memory is an abstraction that simplifies how memory is accessed and managed (for example, through variables, pointers, and data structures). While this view hides many hardware details, the actual physical memory consists of hardware circuits that store data electrically. Essentially, the programmer’s view is a logical model built on top of the physical memory.

(d) Write a C program for awarding student grades using the switch-case construct.

#include <stdio.h>
int main() {
    int score;
    char grade;
    printf("Enter the student's score: ");
    scanf("%d", &score);
    
    switch(score / 10) {
        case 10:
        case 9: grade = 'A'; break;
        case 8: grade = 'B'; break;
        case 7: grade = 'C'; break;
        case 6: grade = 'D'; break;
        default: grade = 'F'; break;
    }
    
    printf("The grade is: %c\n", grade);
    return 0;
}

(e) Define Cloud Computing, Mobile Cloud Computing, and Mobile Edge Computing.

  • Cloud Computing: Provides on-demand computing resources (servers, storage, applications) over the internet, enabling scalable and flexible IT solutions.
  • Mobile Cloud Computing: Extends cloud computing to mobile devices, allowing them to leverage remote resources for processing and storage, reducing the load on the device.
  • Mobile Edge Computing: Moves computing resources closer to the mobile user (at the network’s edge) to reduce latency and improve performance for applications that require real-time processing.

(f) What is an Artificial Neural Network? Differentiate between Deep Learning and Reinforcement Learning.

  • Artificial Neural Network (ANN): A computing system inspired by the human brain’s network of neurons, designed to recognize patterns and learn from data.
  • Deep Learning: A subset of machine learning that uses multi-layered (deep) neural networks to model complex patterns in data.
  • Reinforcement Learning: A type of machine learning where an agent learns to make decisions by performing actions and receiving feedback (rewards or penalties) from the environment.

7. C Programming and Management Questions

(a) Write a C program for finding the grade of a student based on marks entered from the keyboard.

#include <stdio.h>
int main() {
    int marks;
    char grade;
    
    printf("Enter marks: ");
    scanf("%d", &marks);
    
    if (marks >= 90)
        grade = 'A';
    else if (marks >= 80)
        grade = 'B';
    else if (marks >= 70)
        grade = 'C';
    else if (marks >= 60)
        grade = 'D';
    else
        grade = 'F';
    
    printf("The grade is: %c\n", grade);
    return 0;
}

(b) Differentiate between Device Management and Information Management.

  • Device Management: Focuses on controlling and monitoring hardware components (such as computers, printers, and mobile devices) within an IT environment, ensuring proper configuration, updates, and security.
  • Information Management: Involves the systematic collection, storage, retrieval, and use of data and information within an organization, emphasizing data quality, accessibility, and usability for decision-making.

8. Data Types and Report Views

What is a data type? What is the use of Auto Number and OLE Object data types? Define Report View and Layout View of a report.

  • Data Type:
    A data type defines the nature of data that can be stored in a variable or a database field, such as integers, floats, characters, or dates. It helps ensure that operations on the data are performed correctly.
  • Auto Number:
    An Auto Number field automatically generates a unique number for each record, commonly used for primary keys in databases to uniquely identify entries.
  • OLE Object:
    The OLE (Object Linking and Embedding) Object data type is used to store or link to complex data types like images, audio, or other files that aren’t plain text.
  • Report View and Layout View:
    • Report View: A mode in which a report is displayed with its data, making it easy to read and analyze the final formatted output.
    • Layout View: Allows users to modify the design and layout of the report while still showing real data, providing a balance between design customization and data visualization.
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Conclusion

In summary, this answer sheet for the Class 9 Computer Science Annual Exam Question Paper provides a detailed walkthrough of various topics—from multiple-choice questions and fill-in-the-blanks to complex programming examples and conceptual explanations. We hope that these comprehensive solutions not only enhance your understanding of key computer science principles but also boost your confidence as you prepare for your exams. Keep practicing, stay curious, and use this guide as a stepping stone towards academic success in computer science.

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