What is the primary purpose of using functions in C programming?

The correct answer is A: To modularize code and improve reusability. Functions allow code reusability, modularity, and easier maintenance. They break down complex problems into smaller, manageable pieces.

What is the size of a pointer variable on a 32-bit system?

The correct answer is B: 4 bytes. On a 32-bit system, all pointers are 4 bytes (32 bits) regardless of the data type they point to.

What will be the output? int arr[5] = {1,2,3,4,5}; int *p = arr; p += 2; printf("%d", *p);

The correct answer is C: 3. p points to arr[0]. After p += 2, p points to arr[2] which contains value 3. Pointer arithmetic moves by element size.

Predict the output: for(int i = 0; i < 2; i++) for(int j = 0; j < 2; j++) if(i + j == 1) continue; printf("Done");

The correct answer is A: Done. continue only affects the inner loop, not the outer. The loops complete normally and 'Done' is printed once after both loops finish.

What will be the output of this code? int n = 5; switch(n) { case 4: printf("Four"); case 5: printf("Five"); case 6: printf("Six"); break; default: printf("Other"); }

The correct answer is B: FiveSix. n=5 matches case 5. Without break, it falls through to case 6 before encountering break. Prints 'FiveSix'.

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C language from basics to advanced placement prep

51 Q 10 Topics Take Mock Test

Difficulty: All Easy Medium Hard 51–51 of 51

Topics in C Programming

All Basics & Syntax 86 Data Types & Variables 97 Control Flow 100 Functions 99 Arrays & Strings 100 Pointers 99 Structures & Unions 100 File Handling 100 Dynamic Memory 98 Preprocessor 99

Q.51 Medium Pointers

What is the output?
int a = 5;
int *p = &a;
int **q = &p;
printf("%d", **q);

A 5

B Address of a

C Address of p

D Compilation error

Correct Answer: A. 5

EXPLANATION

q is a pointer to pointer p. **q dereferences q to get p, then dereferences p to get the value 5.

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Pointers