NEB Class 12 Computer Science: Important Board Questions Collection

Table of Contents & Unit Weightage

Unit 1: Database Management System (DBMS) [8 Marks]

1. What is Database and DBMS? List out the advantages and disadvantages of DBMS.
2. Explain the different models of DBMS with their advantages and disadvantages.
3. Differentiate between centralized and distributed database systems.
4. Who is a DBA? What are the major responsibilities of a DBA?
5. What is normalization? Explain the normalization process (1NF, 2NF, 3NF) with examples.
6. Define the following terms:
   a) Data Dictionary

   b) Primary Key

   c) Relationship

   d) DML

   e) SQL

   f) Data Integrity

   g) DDL

   h) Data Security

   i) Database System

Unit 2: Data Communication & Networking [9 Marks]

1. What is a Computer Network? Explain the advantages and disadvantages of a computer network.
2. Discuss different types of computer networks on the basis of size (LAN, MAN, WAN).
3. What do you mean by network topology? Explain the different types of network topologies.
4. Differentiate between LAN and WAN.
5. Define network architecture. Differentiate between client-server and peer-to-peer networks.
6. Differentiate between Simplex, Half Duplex, and Full Duplex transmission modes.
7. Differentiate between the Internet and Intranet.
8. What is Internet addressing? Discuss common Network Tools.
9. What do you mean by transmission media? Explain the different types of transmission media used in computer networks (Guided vs Unguided).
10. What do you mean by the OSI reference model? Explain the different layers of the OSI reference model.
11. Define the following terms:
    a) Repeater

    b) Bridge

    c) Protocol

    d) Router

    e) Satellite

    f) Microwave System

    g) Subnet Mask

    h) MAC Address

    i) Coaxial Cable

    j) Fiber Optic Cable

Unit 3: Web Technology II [8 Marks]

Theoretical Questions

1. What is web technology? Explain different data types used in JavaScript.
2. Differentiate between client-side scripting and server-side scripting.
3. What is event handling in JavaScript? Give one example.
4. What is jQuery? Write its features and write a program to display the message "Hello Class 12" using jQuery.
5. What is JavaScript? How can you add JavaScript to an HTML page? Describe with an example.
6. What is a JavaScript function? Explain with calling function examples.
7. What is PHP? Write the advantages of PHP.
8. Explain the different operators used in PHP.
9. What are the features of PHP? Write a PHP program to display the largest among three numbers.
10. Define SQL. Write down the SQL queries to create a database, create a table in the database, insert data in the table, and query the data to display it.
11. Write down the server-side script to create a database, connect with it, create a table, and insert data into it.

Practical & Programmatic Questions

1. Write a JavaScript program to display 1 to 10 using a for loop, while loop, and do-while loop.
2. Create a web page with a button labeled "Computer". On clicking the button, your page heading should change to "Computer Science".
3. Write a JavaScript program to display "Welcome Class-12" using the onload event.
4. Design a form with username, address, e-mail, password, and submit button. Validate the form using jQuery.
5. Design a form with username, password, and submit button. Write PHP code to retrieve the values of username and password using:
   a) $_POST variable     b) $_GET variable.
6. Write a PHP program to check if a given string is a palindrome or not.
7. Write a JavaScript program to calculate the factorial of a given number.
8. Write a program to input three numbers and find the largest one using JavaScript and PHP.

Unit 4: Programming in C [8 Marks]

Theoretical Questions

1. What is C? Write its features.
2. What are the advantages and disadvantages of C programming language?
3. What is a Data Type? Explain the types of data with examples.
4. What is a variable? Explain its types.
5. What is an operator? Write its types and explain any four of them.
6. What is a control structure? Differentiate between break and continue statements with examples.
7. What is looping? Differentiate between while and do-while loops with examples.
8. Define the term array. What is a string? Explain any four string-handling functions with examples.
9. What is a function? Write its features and describe its types.
10. What is the recursion technique? Explain with one example.
11. What is the concept of storage? Differentiate between automatic storage and external storage.
12. What is a Structure? Explain with one example.
13. Differentiate between array and structure.
14. Differentiate between structure and union.
15. Differentiate between array and pointer.
16. Define call by value and call by reference with examples.
17. What is a pointer? Explain with examples.
18. Differentiate between Structure and Pointer.
19. Differentiate between sequential access and random access techniques in data files.
20. Differentiate between fprintf() and fscanf() functions.

Important Selected C Programs

1. Write a program to input any three numbers and find the largest number.
2. Write a program to display the day of the week using the switch statement based on the number entered (1 for Sunday, 7 for Saturday).
3. Write a program to input a number and check whether it is prime or not.
4. Write a program to display the sum of even and odd numbers from 1 to 50.
5. Write a program to accept the age of 10 employees and count the number of employees:
   a) Whose age is ≥ 60     b) Whose age is < 35.
6. Write a program to enter elements for a 3x3 matrix and display their sum.
7. Write a program to accept 10 numbers in an array and sort them in descending order.
8. Write a program to input a number and check whether it is a palindrome or not.
9. Write a program to input the names of N students and sort them in alphabetical order.
10. Write a program to read a number, calculate the sum of its individual digits, and print it using recursion.
11. Write a program that reads names and addresses into the computer and rearranges the names in alphabetical order using structure variables.
12. Write a program to read N students' records, store them in a data file, and display the content in an appropriate format using fprintf() and fscanf().

Unit 5: Object-Oriented Programming (OOP) [6 Marks]

1. What is OOP? Describe its core features.
2. What are the advantages and disadvantages of using OOP?
3. Explain the terms polymorphism and inheritance.
4. Differentiate between Object-Oriented Programming and Structured Programming Language.
5. Explain Class, Object, and Encapsulation.

Unit 6: Software Development Model (SPM) [6 Marks]

1. What is SPM? Explain the major activities of the Software Development Process in brief.
2. What is a Software Development Model? Explain the types of SDM with their advantages and disadvantages.
3. Who is a System Analyst? Explain the role and characteristics of a system analyst.
4. Explain in detail the Waterfall, Prototyping, and Spiral models of software development.
5. What is prototyping? Write down its advantages and disadvantages.
6. Define SDLC. Explain the different phases of SDLC in brief.
7. What do you mean by a feasibility study? Why is it necessary before designing a system?
8. Define system testing. Differentiate between Black Box testing and White Box testing.
9. What are algorithms and flowcharts? Differentiate between a system flowchart and a program flowchart.
10. Differentiate between System Analysts and System Engineers.
11. Define the following terms:
    A) DFD

    B) ER Diagram

    C) Use Case Diagram

    D) Waterfall Model

    E) System Flowchart

    F) Documentation

    G) Algorithm

    H) SDLC

    I) Decision Table & Tree

    J) Prototyping Model

    K) Spiral Model

Unit 7: Recent Trends in Technology [5 Marks]

1. What do you mean by AI? How does it affect modern society?
2. Explain the concept of Big Data and its types.
3. What is Big Data? Write down its applications.
4. What is E-Commerce? Write down its advantages.
5. What is mobile computing? Write its features.
6. Define the following terms:
   a) M-Commerce

   b) Robotics

   c) E-Learning

   d) Virtual Reality

   e) Social Media

   f) IoT

   g) E-Governance

   h) Cloud Computing