100 Multiple Choice Questions In C Programming – Part 8

This collection of 100 Multiple Choice Questions and Answers (MCQs) In C Programming : Quizzes & Practice Tests with Answer focuses on “C Programming”.
 

1. With which value should a pointer be initialized?

A 0

B NULL

C -1

D None of the above

2. According to the following statements, what is the output of “p2”?

int A = 5;
int *p1 = &A; // p1 points to A
int **p2 = &p1; // p2 points to p1

A The value of A

B The address of p1

C The address of A

D None of the above

B

A pointer is an object (Lvalue) whose value is equal to the address of another object. A pointer is declared by the following instruction:

type *pointer-name;

Where type is the type of the pointed object. This declaration declares an identifier, ‘pointer-name’, associated with an object whose value is the address of another object. The identifier ‘pointer-name’ is an address identifier. As for any Lvalue, its value is modifiable.
 

 

3. The function tolower() defined in the C library works for ___?

A Ascii character set

B Ascii and utf-8 but not the EBSIDIC character set

C Unicode character set

D Any set of characters

4. What is the output of the code below considering the size of “short int” is 2, “char” is 1 and “int” is 4 bytes?

#include <stdio.h>

int main()
{
     short int a = 20;
     char b = 97;
     printf("%d, %d, %d\n", sizeof(a), sizeof(b), sizeof(b + a));
     return 0;
}

A 2, 1, 1

B 2, 1, 4

C 2, 1, 2

D 2, 2, 8

5. Which type conversion is NOT accepted?

A char –> int

B double –> char

C int –> char

D float –> char *

6. Which of the following will be the type of ‘res’?

res = (float)x * (int)y / (long)w * (double)z

A double

B float

C long

D int

7. Which of the following type-casting can be “wrapped”?

A char –> int

B int –> float

C int –> char

D char –> short

int i = 48;
char c = (char)i;

8. Which of the following type-casting is accepted in C?

A Implicit type conversion

B Explicit type conversion

C Both

D None of the above

(type) expression;

9. When should you use type-casting?

A The value to be stored exceeds the maximum limit

B The value to be stored is not supported by this data type

C To reduce the memory used, according to the value

D All the answers are true

10. Which of the following codes creates an array of 5 integers?

A int arr(5);

B int *arr[5];

C int arr[4];

D int arr[5];

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