C Programming MCQ Questions with answers and solutions Page 148

Q. Which of the following is correct about array indexing?

(A) a[5] = 0 is valid for array of size 5
(B) a[0] is always the last element
(C) a[-1] is valid
(D) a[0] is the first element

💬 Discuss

✅ Correct Answer: (D) a[0] is the first element

Explanation: Arrays in C are 0-indexed, so the first element is a[0].

Published by Mr. Dubey ⭐ 109.99K Points at 07-Jun-2025 09:25 am in C Programming

Q. What is the result of sizeof(char)?

(A) 2
(B) 1
(C) 4
(D) Depends on OS

💬 Discuss

✅ Correct Answer: (B) 1

Explanation: The size of a char is always 1 byte in C.

Published by Mr. Dubey ⭐ 109.99K Points at 07-Jun-2025 09:25 am in C Programming

Q. What is the output of the following code?

Code:

int a = 10;
if (a = 0)
    printf("Zero");
else
    printf("Non-zero");

(A) Zero
(B) Non-zero
(C) Compile error
(D) Runtime error

💬 Discuss

✅ Correct Answer: (B) Non-zero

Explanation: The assignment 'a = 0' evaluates to false, so the else block runs and prints 'Non-zero'.

Published by Mr. Dubey ⭐ 109.99K Points at 07-Jun-2025 09:26 am in C Programming

Q. Which function is used to dynamically allocate memory in C?

(A) calloc()
(B) malloc()
(C) realloc()
(D) All of the above

💬 Discuss

✅ Correct Answer: (D) All of the above

Explanation: All three are used for dynamic memory allocation.

Published by Mr. Dubey ⭐ 109.99K Points at 07-Jun-2025 09:26 am in C Programming

Q. What is the output of the following code?

Code:

int x = 10;
printf("%d", x++);

(A) 10
(B) 11
(C) 9
(D) Undefined

💬 Discuss

✅ Correct Answer: (A) 10

Explanation: Post-increment returns value before incrementing.

Published by Mr. Dubey ⭐ 109.99K Points at 07-Jun-2025 09:26 am in C Programming

Q. What is the output of the following code?

Code:

int arr[] = {1,2,3};
printf("%d", *(arr+1));

(A) 1
(B) 2
(C) 3
(D) Undefined

💬 Discuss

✅ Correct Answer: (B) 2

Explanation: arr+1 points to the second element of the array.

Published by Mr. Dubey ⭐ 109.99K Points at 07-Jun-2025 09:26 am in C Programming

Q. Which header file is required for using printf()?

(A) conio.h
(B) math.h
(C) stdio.h
(D) stdlib.h

💬 Discuss

✅ Correct Answer: (C) stdio.h

Explanation: stdio.h includes declarations for input/output functions.

Published by Mr. Dubey ⭐ 109.99K Points at 07-Jun-2025 09:26 am in C Programming

Q. Which operator is used for conditional branching?

(A) if
(B) switch
(C) ?:
(D) &&

💬 Discuss

✅ Correct Answer: (C) ?:

Explanation: The ternary operator (?:) is used for conditional evaluation.

Published by Mr. Dubey ⭐ 109.99K Points at 07-Jun-2025 09:26 am in C Programming

Q. What is the output of this code?

Code:

int a = 1;
if (a)
    printf("True");
else
    printf("False");

(A) True
(B) False
(C) 1
(D) Compile Error

💬 Discuss

✅ Correct Answer: (A) True

Explanation: Any non-zero integer in condition is treated as true.

Published by Mr. Dubey ⭐ 109.99K Points at 07-Jun-2025 09:26 am in C Programming

Q. Which of these is used to terminate a C statement?

(A) ,
(B) .
(C) ;
(D) :

💬 Discuss

✅ Correct Answer: (C) ;

Explanation: C statements are terminated using semicolons.

Published by Mr. Dubey ⭐ 109.99K Points at 07-Jun-2025 09:26 am in C Programming

C Programming MCQs with answers Page - 148

Q. Which of the following is correct about array indexing?

Q. What is the result of sizeof(char)?

Q. What is the output of the following code?

Q. Which function is used to dynamically allocate memory in C?

Q. What is the output of the following code?

Q. What is the output of the following code?

Q. Which header file is required for using printf()?

Q. Which operator is used for conditional branching?

Q. What is the output of this code?

Q. Which of these is used to terminate a C statement?

Programming Categories

📱 Download Our App