C Programming Multiple Choice Question MCQ

Categories: MCQS

Q1. Pseudocode:

FUNCTION Add(a, b) RETURN a PLUS b END FUNCTION CALL Add(5, 10)

(A) 15

(B) 5

(C) 10

(D) Error

Answer: 15

Q2. Pseudocode:

FUNCTION CheckEven(number) IF number MOD 2 EQUALS 0 THEN RETURN True ELSE RETURN False END FUNCTION CALL CheckEven(4)

(A) True

(B) False

(C) Error

(D) None

Answer: True

Q3. Pseudocode:

FUNCTION Fibonacci(n) IF n LESS THAN OR EQUAL TO 1 THEN RETURN n ELSE RETURN Fibonacci(n-1) PLUS Fibonacci(n-2) END FUNCTION CALL Fibonacci(5)

(A) 5

(B) 8

(C) Error

(D) None

Answer: 5

Q4. Identify the error in this C code:

int main() {

printHello();

return 0;

}

void printHello() {

printf("Hello");

}

(A) Missing declaration of printHello

(B) Syntax error

(C) No error

(D) Wrong function call

Answer: Missing declaration of printHello

Q5. Spot the mistake:

int main() {

int result = sum(5, 10);

printf("%d", result);

return 0;

}

int sum(int a, int b) {

return;

}

(A) Missing return value in sum

(B) Syntax error

(C) No error

(D) Incorrect function parameters

Answer: Missing return value in sum

Q6. Find the error:

int main() {

int x = 5;

increment(&x);

printf("%d", x);

return 0;

}

void increment(int* n) {

*n++;

}

(A) Incorrect pointer usage in increment

(B) Syntax error

(C) No error

(D) Wrong printf format

Answer: Incorrect pointer usage in increment

Q7. How do you declare an array of integers in C?

(A) int arr[10];

(B) array int[10];

(C) int array 10;

(D) [10]int array;

Answer: int arr[10];

Q8. Which index is used to access the first element of an array in C?

(A) 0

(B) 1

(C) -1

(D) First

Answer: 0

Q9. What happens when you try to access an array element outside its bounds in C?

(A) Syntax error

(B) Compilation error

(C) Runtime error

(D) Undefined behavior

Answer: Undefined behavior

Q10. How do you initialize an array in C?

(A) With any value

(B) With 0s

(C) With 1s

(D) Cannot be initialized

Answer: With any value

Q11. Which of the following is a correct way to pass an array to a function in C?

(A) By specifying the size of the array

(B) By passing the first element

(C) By passing the array name

(D) By passing each element individually

Answer: By passing the array name

Q12. What is the size of a 2-dimensional array int arr[3][4]; in C?

(A) 3

(B) 4

(C) 12

(D) Cannot be determined

Answer: 12

Q13. How can you access the third element in the second row of a 2D array int arr[3][4]; in C?

(A) arr[1][2]

(B) arr[2][3]

(C) arr[3][2]

(D) arr[2][1]

Answer: arr[1][2]

Q14. What is the default value of an uninitialized array in C?

(A) 0

(B) 1

(C) Random memory value

(D) -1

Answer: Random memory value

Q15. How does C handle array index out of bounds errors during runtime?

(A) Generates a compile-time error

(B) Automatically corrects the index

(C) Generates a runtime error

(D) Does not check for bounds

Answer: Does not check for bounds

Q16. In C, can an array be resized after its declaration?

(A) Yes

(B) No

(C) Only if it's a dynamic array

(D) Only in C99 standard

Answer: No

Q17. What will be the output of the following C code?

int main() {

int arr[] = {1, 2, 3, 4, 5};

printf("%d", arr[3]);

return 0;

}

(A) 1

(B) 2

(C) 3

(D) 4

Answer: 4

Q18. What is the output of this C code?

int main() {

int arr[5] = {1, 2, 3};

printf("%d", arr[4]);

return 0;

}

(A) 0

(B) 3

(C) Random value

(D) Error

Answer: 0

Q19. What does the following C code do?

int main() {

int arr[3][4] = {{1, 2}, {3, 4}};

printf("%d", arr[1][1]);

return 0;

}

(A) Prints 2

(B) Prints 3

(C) Prints 4

(D) Prints 0

Answer: Prints 4

Q20 Complete the C code:

int main() {

int arr[5];

for(int i = 0; i < 5; i++) { ___ }

printf("%d", arr[2]);

return 0;

}

(A) arr[i] = i;

(B) arr[i] = i * 2;

(C) arr[i] = i + 1;

(D) arr[i] = 0;

Answer: arr[i] = i;