Top 20 Important C Programming Questions for University Exams (With Solutions)

Top 20 Important C Programming Questions for University Exams

If you ask most students what makes C programming exams difficult, the answer is usually the same — knowing which topics are actually important. University exams often repeat similar logic questions year after year.

Instead of trying to revise the entire syllabus randomly, focusing on frequently asked programming questions can make preparation much easier. The questions below cover core concepts that regularly appear in BCA, B.Tech, and other computer science exams.

These examples are written in a simple format so students can quickly understand the logic and revise before exams.

1. Write a Program to Print Hello World

#include <stdio.h>

int main() {
    printf("Hello World");
    return 0;
}

This is usually the first program students learn in C. It simply prints text on the screen using the printf() function.

2. Program to Add Two Numbers

#include <stdio.h>

int main() {
    int a = 5, b = 3;
    int sum;

    sum = a + b;

    printf("Sum = %d", sum);
    return 0;
}

3. Program to Find Even or Odd Number

#include <stdio.h>

int main() {
    int num = 10;

    if(num % 2 == 0)
        printf("Even Number");
    else
        printf("Odd Number");

    return 0;
}

4. Program to Find Factorial of a Number

#include <stdio.h>

int main() {
    int i, num = 5;
    int fact = 1;

    for(i = 1; i <= num; i++) {
        fact = fact * i;
    }

    printf("Factorial = %d", fact);
    return 0;
}

5. Program to Check Prime Number

#include <stdio.h>

int main() {
    int num = 7, i, flag = 0;

    for(i = 2; i < num; i++) {
        if(num % i == 0) {
            flag = 1;
            break;
        }
    }

    if(flag == 0)
        printf("Prime Number");
    else
        printf("Not Prime");

    return 0;
}

Other Frequently Asked C Programming Questions

• Program to reverse a number
• Program to check palindrome number
• Program to find largest of three numbers
• Program to generate Fibonacci series
• Program to swap two numbers using pointers
• Program to sort an array
• Program to search element in an array
• Program using structures
• Program using recursion
• Program for matrix addition
• Program for string length without using strlen()
• Program to count vowels in a string
• Program using file handling in C
• Program using dynamic memory allocation

For university exams, understanding the logic behind these programs is more important than memorizing the code line by line. Students who practice writing these programs themselves usually perform much better during programming exams.