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Quiz based on Digital Principles and Computer Organization

1) Base of hexadecimal number system? Answer : 16 2) Universal gate in digital logic? Answer : NAND 3) Memory type that is non-volatile? Answer : ROM 4) Basic building block of digital circuits? Answer : Gate 5) Device used for data storage in sequential circuits? Answer : Flip-flop 6) Architecture with shared memory for instructions and data? Answer : von Neumann 7) The smallest unit of data in computing? Answer : Bit 8) Unit that performs arithmetic operations in a CPU? Answer : ALU 9) Memory faster than main memory but smaller in size? Answer : Cache 10) System cycle that includes fetch, decode, and execute? Answer : Instruction 11) Type of circuit where output depends on present input only? Answer : Combinational 12) The binary equivalent of decimal 10? Answer : 1010 13) Memory used for high-speed temporary storage in a CPU? Answer : Register 14) Method of representing negative numbers in binary? Answer : Two's complement 15) Gate that inverts its input signal? Answer : NOT 16)...

Important C programs


1) Hello World Program:

#include<stdio.h>
int main()
{
    printf("Hello, World!");
    return 0;
}

2) Program to Add Two Numbers:

#include<stdio.h>
int main()
{
    int num1, num2, sum;
    printf("Enter two numbers: ");
    scanf("%d %d", &num1, &num2);
    sum = num1 + num2;
    printf("Sum = %d", sum);
    return 0;
}

3) Program to Find Factorial of a Number:

#include<stdio.h>
int main()
{
    int num, i, fact=1;
    printf("Enter a number: ");
    scanf("%d", &num);
    for(i=1; i<=num; i++)
    {
        fact *= i;
    }
    printf("Factorial of %d = %d", num, fact);
    return 0;
}

4) Program to Check Whether a Number is Prime or Not:

#include<stdio.h>
int main()
{
    int num, i, flag=0;
    printf("Enter a number: ");
    scanf("%d", &num);
    for(i=2; i<=num/2; i++)
    {
        if(num%i == 0)
        {
            flag = 1;
            break;
        }
    }
    if(flag == 0)
        printf("%d is a prime number", num);
    else
        printf("%d is not a prime number", num);
    return 0;
}

5) Program to Find the Largest Number Among Three Numbers:

#include<stdio.h>
int main()
{
    int num1, num2, num3;
    printf("Enter three numbers: ");
    scanf("%d %d %d", &num1, &num2, &num3);
    if(num1 > num2 && num1 > num3)
        printf("%d is the largest number", num1);
    else if(num2 > num1 && num2 > num3)
        printf("%d is the largest number", num2);
    else
        printf("%d is the largest number", num3);
    return 0;
}

6) Program to Find the Factorial of a Number Using Recursion:

#include<stdio.h>
int factorial(int num);
int main()
{
    int num;
    printf("Enter a number: ");
    scanf("%d", &num);
    printf("Factorial of %d = %d", num, factorial(num));
    return 0;
}
int factorial(int num)
{
    if(num == 0)
        return 1;
    else
        return num * factorial(num-1);
}

7) Program to Print Fibonacci Series:

#include<stdio.h>
int main()
{
    int num, i, t1=0, t2=1, nextTerm;
    printf("Enter the number of terms: ");
    scanf("%d", &num);
    printf("Fibonacci Series: ");
    for(i=1; i<=num; i++)
    {
        printf("%d, ", t1);
        nextTerm = t1 + t2;
        t1 = t2;
        t2 = nextTerm;
    }
    return 0;
}

8) Program to Convert Celsius to Fahrenheit

#include <stdio.h>
int main() {
  float celsius, fahrenheit;
  printf("Enter temperature in Celsius: ");
  scanf("%f", &celsius);
  fahrenheit = (celsius * 1.8) + 32;
  printf("%.2f Celsius = %.2f Fahrenheit", celsius, fahrenheit);
  return 0;
}


9) Program to Check Whether a Number is Armstrong or Not:

#include<stdio.h>
#include<math.h>
int main()
{
    int num, originalNum, remainder, n=0;
    float result=0.0;
    printf("Enter an integer: ");
    scanf("%d", &num);
    originalNum = num;
    while(originalNum != 0)
    {
        originalNum /= 10;
        ++n;
    }
    originalNum = num;
    while(originalNum != 0)
    {
        remainder = originalNum % 10;
        result += pow(remainder, n);
        originalNum /= 10;
    }
    if((int)result == num)
        printf("%d is an Armstrong number.", num);
    else
        printf("%d is not an Armstrong number.", num);
    return 0;
}

10) Program to Find the Reverse of a Number:
#include<stdio.h>
int main()
{
    int num, reverse=0, remainder;
    printf("Enter an integer: ");
    scanf("%d", &num);
    while(num != 0)
    {
        remainder = num % 10;
        reverse = reverse * 10 + remainder;
        num /= 10;
    }
    printf("Reverse of the number = %d", reverse);
    return 0;
}

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