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JAC Board Class 12 Computer Science (C++) MCQ with Answers – Last 3 Years PYQ 2024, 2025 & 2026

Prepare for JAC Board Class 12 Computer Science with important C++ MCQs based on previous-year question patterns from 2024, 2025 and 2026. Practice objective questions with correct answers and short explanations.

Sunil Kumar 31 Aug 2026 6 min read 46 views
JAC Board Class 12 Computer Science C++ MCQ previous year questions with answers

JAC Board Class 12 Computer Science ki preparation kar rahe students ke liye C++ MCQs bahut important hain. Objective questions mein basic concept clear hone ke saath-saath speed aur accuracy bhi matter karti hai.

Is revision set mein hum 2024, 2025 aur 2026 ke JAC Board question-paper patterns ko dhyan mein rakhte hue important C++ MCQs practice karenge.

Student Note: Questions ko sirf memorize mat karo. Har answer ke peeche ka concept samajhne ki koshish karo, because JAC Board same concept ko different wording mein pooch sakta hai.
About this PYQ Set: This is a study-oriented, reworded PYQ practice set based on recent JAC Computer Science paper patterns and recurring C++ topics. It is not presented as a word-for-word reproduction of complete question papers.

JAC Class 12 Computer Science – Important C++ Topics

Previous-paper preparation mein in areas par special focus rakhein:

  • Introduction to C++
  • Tokens, Keywords and Identifiers
  • Data Types and Variables
  • Operators and Expressions
  • Control Statements and Loops
  • Functions and Function Overloading
  • Classes and Objects
  • Inheritance and Polymorphism
  • Encapsulation and Abstraction
  • Pointers and Dynamic Memory
  • Arrays and Strings
  • File Handling

2024 PYQ-Based C++ MCQs

1. Who developed the C++ programming language?

A. Dennis Ritchie

B. Charles Babbage

C. Bjarne Stroustrup

D. James Gosling

Answer: C. Bjarne Stroustrup

2. What is the smallest individual unit of a C++ program called?

A. Token

B. Function

C. Object

D. Program

Answer: A. Token

3. Which character marks the end of a C-style string?

A. \n

B. \t

C. \0

D. \v

Answer: C. \0

4. In C++, cin and cout are predefined:

A. Operators

B. Objects

C. Variables

D. Keywords

Answer: B. Objects

5. Which group contains relational operators?

A. +, -, *, /

B. &&, ||, !

C. <, >, <=, >=, ==, !=

D. ++, --

Answer: C. <, >, <=, >=, ==, !=

6. If y = 10, what is the value of ++y * 5?

A. 50

B. 55

C. 10

D. 60

Answer: B. 55

Explanation: Prefix ++ first changes y from 10 to 11. Therefore 11 × 5 = 55.

7. A do-while loop checks its condition at:

A. Beginning

B. Middle

C. End of the loop

D. Compilation time

Answer: C. End of the loop

8. Wrapping data and related functions into one unit is called:

A. Inheritance

B. Encapsulation

C. Overloading

D. Compilation

Answer: B. Encapsulation

9. Function overloading is an example of:

A. Inheritance

B. Polymorphism

C. Encapsulation

D. File Handling

Answer: B. Polymorphism

10. Memory allocated during program execution is called:

A. Static Memory Allocation

B. Dynamic Memory Allocation

C. Permanent Allocation

D. Fixed Allocation

Answer: B. Dynamic Memory Allocation

2025 PYQ-Based C++ MCQs

11. Which header file is commonly used for cin and cout in modern C++?

A. <iostream>

B. <math.h>

C. <string.h>

D. <stdio.h>

Answer: A. <iostream>

12. Which keyword is used to define a class in C++?

A. object

B. class

C. define

D. structclass

Answer: B. class

13. Which access specifier hides class members from direct outside access?

A. public

B. private

C. global

D. external

Answer: B. private

14. Which operator is normally used to allocate memory dynamically in C++?

A. malloc

B. create

C. new

D. alloc

Answer: C. new

15. Which operator is used to release memory created with new?

A. free

B. remove

C. delete

D. clear

Answer: C. delete

16. Which function has the same name as its class?

A. Destructor

B. Constructor

C. Friend Function

D. Inline Function

Answer: B. Constructor

17. Which symbol is placed before the destructor name?

A. #

B. &

C. ~

D. *

Answer: C. ~

18. In public inheritance, a public member of the base class remains:

A. Public

B. Private

C. Hidden

D. Static

Answer: A. Public

19. Which keyword can be used to suggest expansion of a small function at the point of call?

A. static

B. inline

C. virtual

D. friend

Answer: B. inline

20. Which feature allows one function name to have different parameter lists?

A. Function Overloading

B. Data Hiding

C. Inheritance

D. File Handling

Answer: A. Function Overloading

2026 PYQ-Pattern C++ MCQs

21. Which statement is used to take input in C++?

A. cout

B. cin

C. print

D. input

Answer: B. cin

22. Which statement sends output to the standard output stream?

A. cin

B. cout

C. scanf

D. input

Answer: B. cout

23. Which loop always executes its body at least once?

A. for

B. while

C. do-while

D. None

Answer: C. do-while

24. Array indexing in C++ normally begins from:

A. 0

B. 1

C. -1

D. 2

Answer: A. 0

25. Which operator represents logical AND?

A. &

B. &&

C. ||

D. !

Answer: B. &&

26. Which statement immediately terminates a loop?

A. continue

B. break

C. skip

D. next

Answer: B. break

27. Which statement skips the remaining part of the current loop iteration?

A. break

B. return

C. continue

D. stop

Answer: C. continue

28. Which operator is used for incrementing a variable by one?

A. +

B. +=

C. ++

D. **

Answer: C. ++

29. A pointer stores:

A. Only integer values

B. Address of another variable

C. Only character values

D. Program output

Answer: B. Address of another variable

30. Which header is used for C++ file stream classes in modern C++?

A. <fstream>

B. <math>

C. <array>

D. <stdio>

Answer: A. <fstream>

Quick Answer Key

Q Answer Q Answer
1C16B
2A17C
3C18A
4B19B
5C20A
6B21B
7C22B
8B23C
9B24A
10B25B
11A26B
12B27C
13B28C
14C29B
15C30A

Most Important C++ Areas for JAC Board Revision

High Priority: Students should especially revise C++ basics, tokens, operators, loops, functions, class & object, inheritance, polymorphism, encapsulation, pointers and file handling.

Ek common mistake ye hoti hai ki student sirf correct option yaad karta hai. Board exam mein wording change hone par confusion ho jata hai.

Isliye har MCQ ke concept ko 1–2 lines mein explain karna seekhein.

How to Prepare C++ MCQs for JAC 12th Board Exam

  1. First revise the basic definition of every C++ concept.
  2. Practice operators and output-based questions manually.
  3. Learn the difference between class, object, constructor and destructor.
  4. Understand inheritance and polymorphism with examples.
  5. Practice loops and increment/decrement expressions.
  6. Revise pointers, arrays, strings and dynamic memory allocation.
  7. Solve previous-year and model-paper MCQs in exam-like timing.
Exam Tip

MCQ easy dikh raha ho tab bhi option immediately mark mat karo. Question ko complete read karo — especially NOT, incorrect, correct, output, prefix aur postfix jaise words carefully check karein.

Frequently Asked Questions

Is C++ important for JAC Class 12 Computer Science?

Yes. C++ concepts such as programming fundamentals, OOP, classes, inheritance, functions, pointers and related topics are important areas for JAC Class 12 Computer Science preparation.

Are previous-year MCQs useful for JAC Board preparation?

Yes. PYQs help students understand question style, recurring concepts and the level of objective questions. Lekin sirf PYQ memorize karna enough nahi hai — concept bhi clear hona chahiye.

Which C++ topics should I revise first?

Start with C++ basics, tokens, data types, operators and control statements. Then revise functions, classes, objects, inheritance, polymorphism, pointers and file handling.

Should I practice output-based C++ questions?

Yes. Output-based questions improve your understanding of operators, loops, conditions, increment/decrement and program execution.

Final Revision Advice

JAC Class 12 Computer Science mein good score ke liye theory + programming + MCQ practice teeno important hain.

Previous-year questions ko practice karo, repeated concepts identify karo aur har wrong answer ka reason samjho.

PYQ ko ratna nahi hai — PYQ ke concept ko samajhna hai.
Concept strong hoga to question ka format change hone par bhi answer kar paoge.

Article tags

#C++ #JAC Board #MCQ #Objective Questions #Previous Year Questions #Solved Questions

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