Interview Preparation

C interviews mostly check fundamentals: memory, pointers, arrays, functions, strings, structures, files and logic building.

Important Questions and Answers

Common Coding Questions

• Reverse a string without library function
• Check prime number
• Find second largest element in array
• Swap two numbers using pointer
• Implement stack using array
• Count vowels in a string
• Write and read student record from file
• Create linked list and display nodes

#include <stdio.h>

void swap(int *a, int *b) {
    int temp = *a;
    *a = *b;
    *b = temp;
}

Interview Tips

• Explain memory diagrams for pointer questions
• Always mention base condition in recursion
• Write clean code with meaningful names
• Check edge cases
• Do not ignore compile warnings