HISSAN 2081 Grade 12 Computer Science – Full Questions & Solutions

 

 

HISSAN CENTRAL EXAMINATION 2081 (2025)

Grade: XII Time: 2 hrs

F.M.: 50

COMPUTER SCIENCE (4281 M1)

Candidates are required to give their answers in their own words as far as practicable.

Multiple Choice Questions.

GROUP A

Writes the best alternative.

[9×1=9]

1.Which database language is used for defining schema structures?

a)DML                                                b)DDL

c)DCL                                                d)TCL

 

ans: b)DDL

 

2. Which of the following operations are used to extract data from a

database?

a)SELECT                                         b)DELETE

c)UPDATE                                         d)INSERT

 

ans: a)SELECT

3. Which of the following is NOT a valid PHP data type?

a)String                              b)Float

c)Character                      d)Boolean

 

ans: c)Character

4.Which symbol is used for single-line comments in JavaScript?

a)//                                      b)/* */

c)<!-- -->                            d)**

 

ans a)//

5.What is the default return type of a function in C if no return type is

specified?

a)void                                 b)int

c)char                                 d)float

 

Ans: b)int

6. Which network device is used to connect multiple networks together?

a)Hub                                                b)Switch

c)Router                                            d)Repeater

 

ans: c)Router

7. What is cloud computing?

a)A type of software                                                                                 b)A type of hardware

c)The delivery of computing services over the internet                d)A programming language

 

Ans: c)The delivery of computing services over the internet             

8. Which of the following is NOT a principle of OOP?

a)Encapsulation                            b)Inheritance

c) Compilation                                d)Polymorphism

 

Ans: c) Compilation

9.Which of the following SDLC models is also known as the "linear-

sequential model"?

a)Spiral Model                                b)Waterfall Model

c)Agile Model                                  d)V-Model

 

Ans: b)Waterfall Model

Short Answer Questions: 15×5-25]

GROUP B

10. What is database? Explain any three advantages of DBMS.                                             [2+3=5]

OR

Explain second normal form with example.                                                                                  [5]

11. Write a javascript function that takes two numbers as arguments and returns their sum.[5]

OR

Write a PHP script to find the largest of three numbers.

12. Explain the concept of inheritance in OOP. How does inheritance help in code reusability?[2+3]

13 What is e-learning? Write any three advantages of e-learning.                                        [2+3]

14. What is the purpose of the requirements gathering phase in the SDLC? Explain. [2+3]

 

Long Answer Questions: [2x8-16]

GROUP C

15.What is computer network? Explain any three types of network topologies with their advantages.

[2+6]

16. Write a C program to read and display employee details using a structure. [Define a structure Employee to store employee name (string), ID (integer), and salary (float)]. Write a program to input values for these fields and then display them.

OR

What is pointer? Write a C program to add two numbers using call by reference.                          [2+6]

THE END