Principle Programming and Algorithm Important Questions And Solutions BCA 1st Semester

BCA 1st Semester Important Questions And Solutions



Important Question And Solutions For BCA 1st Semester Students. In this Article we are covered Most Important Questions . We covered all Important Assignment Questions also In this You can use this questions in your Assignment making . in this we covered c language important question for BCA or other Courses.  20+ Most Important Questions And Solutions
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Questions:

Q1. Write a program to Add and Subtract two Numbers.

Sol-

#include <stdio.h>


int main() {

    int num1, num2, sum, difference;

    

    // Input the two numbers

    printf("Enter first number: ");

    scanf("%d", &num1);

    printf("Enter second number: ");

    scanf("%d", &num2);

    

    // Calculate sum and difference

    sum = num1 + num2;

    difference = num1 - num2;

    

    // Output the results

    printf("Sum: %d\n", sum);

    printf("Difference: %d\n", difference);

    

    return 0;

}


Q2.Write a program for inserting all Five vowels and print it code in c language.

Sol-
#include <stdio.h>

int main() {
    char ch;

    // Prompt the user to input a character
    printf("Enter a character: ");
    scanf(" %c", &ch);

    // Check if the input character is a vowel
    if (ch == 'a' || ch == 'A' || ch == 'e' || ch == 'E' || ch == 'i' || ch == 'I' || ch == 'o' || ch == 'O' || ch == 'u' || ch == 'U') {
        printf("%c is a Vowel.\n", ch);
    } else {
        printf("%c is a Consonant.\n", ch);
    }

    return 0;
}


Q3- write a program for simple interest where p , r, t are given by user.
Sol-
#include <stdio.h> int main() { float p, r, t, simple_interest; // Input principal amount, rate, and time period from the user printf("Enter principal amount: "); scanf("%f", &p); printf("Enter interest rate (in percentage): "); scanf("%f", &r); printf("Enter time period (in years): "); scanf("%f", &t); // Convert interest rate from percentage to decimal r = r / 100; // Calculate simple interest simple_interest = (p * r * t); // Output the result printf("Simple Interest = %.2f\n", simple_interest); return 0; }

Q4-Write a program for area of circle.
Sol-
#include <stdio.h> #define PI 3.14159 int main() { float radius, area; // Get input from the user printf("Enter the radius of the circle: "); scanf("%f", &radius); // Calculate the area of the circle area = PI * radius * radius; // Display the result printf("Area of the circle with radius %.2f = %.2f\n", radius, area); return 0; }

Q5- write a program for maximum of two number by using conditional operator.
Sol-
#include <stdio.h> int main() { int num1, num2, max; // Input two numbers from the user printf("Enter first number: "); scanf("%d", &num1); printf("Enter second number: "); scanf("%d", &num2); // Use conditional operator to find the maximum max = (num1 > num2) ? num1 : num2; // Display the maximum number printf("Maximum of %d and %d is: %d\n", num1, num2, max); return 0; }

Q6- write a program for inserting first 10 even number.
Sol-
#include <stdio.h> int main() { int even_numbers[10]; int i, num = 2; // Starting from 2, the first even number // Inserting the first 10 even numbers into the array for (i = 0; i < 10; i++) { even_numbers[i] = num; num += 2; // Incrementing by 2 to get the next even number } // Printing the even numbers printf("First 10 even numbers are:\n"); for (i = 0; i < 10; i++) { printf("%d ", even_numbers[i]); } printf("\n"); return 0; }

Q7- write a program to check the inserted number is even or odd.
Sol-
#include <stdio.h> int main() { int num; // Input a number from the user printf("Enter a number: "); scanf("%d", &num); // Check if the number is even or odd if (num % 2 == 0) { printf("%d is even.\n", num); } else { printf("%d is odd.\n", num); } return 0; }

Q8- write a program to displaying the table of inserted number.
Sol-
#include <stdio.h>

int main() {
    int num;

    // Input a number from the user
    printf("Enter a number: ");
    scanf("%d", &num);

    // Display the multiplication table of the inserted number
    printf("Multiplication table of %d:\n", num);
    for (int i = 1; i <= 10; i++) {
        printf("%d x %d = %d\n", num, i, num * i);
    }

    return 0;
}

Q9-write a program for sum of first n natural number.
Sol-
#include <stdio.h> int main() { int n, sum = 0; // Input the value of n from the user printf("Enter the value of n: "); scanf("%d", &n); // Calculate the sum of the first n natural numbers for (int i = 1; i <= n; i++) { sum += i; } // Display the sum printf("Sum of first %d natural numbers = %d\n", n, sum); return 0; }

Q10- write a program to print half pyramid.
Sol-
#include <stdio.h> int main() { int rows; // Input the number of rows from the user printf("Enter the number of rows: "); scanf("%d", &rows); // Print the half pyramid pattern for (int i = 1; i <= rows; i++) { for (int j = 1; j <= i; j++) { printf("* "); } printf("\n"); } return 0; }

Q11- write a program to find the factorial of an inserted number.
Sol-
#include <stdio.h> int main() { int num; unsigned long long factorial = 1; // Use 'unsigned long long' to handle larger factorials // Input a number from the user printf("Enter a positive integer: "); scanf("%d", &num); // Check if the number is negative if (num < 0) { printf("Error: Factorial of a negative number is undefined.\n"); } else { // Calculate the factorial for (int i = 1; i <= num; i++) { factorial *= i; } // Display the factorial printf("Factorial of %d = %llu\n", num, factorial); } return 0; }

Q12- write a program to find largest of two number using function.
Sol-
#include <stdio.h> // Function to find the maximum of two numbers int findMax(int num1, int num2) { return (num1 > num2) ? num1 : num2; } int main() { int num1, num2; // Input two numbers from the user printf("Enter first number: "); scanf("%d", &num1); printf("Enter second number: "); scanf("%d", &num2); // Call the function to find the maximum int largest = findMax(num1, num2); // Display the result printf("The largest number is: %d\n", largest); return 0; }
Q13- write a program to interchange two value by using function.
Sol-
#include <stdio.h> // Function to swap two integers using pointers void swap(int *a, int *b) { int temp = *a; *a = *b; *b = temp; } int main() { int num1, num2; // Input two numbers from the user printf("Enter first number: "); scanf("%d", &num1); printf("Enter second number: "); scanf("%d", &num2); // Before swapping printf("Before swapping: num1 = %d, num2 = %d\n", num1, num2); // Call the swap function to interchange the values swap(&num1, &num2); // After swapping printf("After swapping: num1 = %d, num2 = %d\n", num1, num2); return 0; }
Q14-write a program to print the day name by switch statement
Sol-
#include <stdio.h> int main() { int day; // Input a number representing the day of the week printf("Enter a number (1-7) representing the day of the week: "); scanf("%d", &day); // Print the corresponding day name using switch statement switch(day) { case 1: printf("Sunday\n"); break; case 2: printf("Monday\n"); break; case 3: printf("Tuesday\n"); break; case 4: printf("Wednesday\n"); break; case 5: printf("Thursday\n"); break; case 6: printf("Friday\n"); break; case 7: printf("Saturday\n"); break; default: printf("Invalid input! Please enter a number between 1 and 7.\n"); } return 0; }
Q15-write a program to insert a number and reverse the digit.
Sol-
#include <stdio.h> int main() { int num, reversedNum = 0, remainder; // Input a number from the user printf("Enter a number: "); scanf("%d", &num); // Reverse the digits of the number while (num != 0) { remainder = num % 10; reversedNum = reversedNum * 10 + remainder; num /= 10; } // Display the reversed number printf("Reversed number: %d\n", reversedNum); return 0; }

Q16-write a program print the prime number up to a given number.
Sol-
#include <stdio.h> #include <stdbool.h> // Function to check if a number is prime bool isPrime(int num) { if (num <= 1) { return false; } for (int i = 2; i * i <= num; i++) { if (num % i == 0) { return false; } } return true; } int main() { int n; // Input the number from the user printf("Enter a number: "); scanf("%d", &n); // Print prime numbers up to n printf("Prime numbers up to %d are: ", n); for (int i = 2; i <= n; i++) { if (isPrime(i)) { printf("%d ", i); } } printf("\n"); return 0; }

Q17- write a program to find the area of the rectangle (using reference)
Sol-
#include <stdio.h> // Function to calculate the area of a rectangle using references void calculateArea(float length, float width, float *area) { *area = length * width; } int main() { float length, width, area; // Input length and width from the user printf("Enter length of the rectangle: "); scanf("%f", &length); printf("Enter width of the rectangle: "); scanf("%f", &width); // Call the function to calculate area using references calculateArea(length, width, &area); // Display the area of the rectangle printf("Area of the rectangle = %.2f\n", area); return 0; }