Computer Knowledge - MCQ Practice Questions

What will be the output of: int a = 5, b = 5; if(a == b) printf("Equal"); else printf("Not Equal");

What will be the output of: char c = 'A'; printf("%d", c);

Consider a complex expression: int x = 2 + 3 * 4 - $\frac{5}{2}$; What is x?

Which header file is essential for using the printf() function in C?

What is the output of: int arr[5]; printf("%d", sizeof(arr));

Which function is used to allocate memory dynamically at runtime?

What is the purpose of the break statement in a switch case?

What will be the output of: int x = 5, y = 10; if (x < y) printf("yes"); else printf("no");

Which of the following is NOT a valid way to pass arguments to a function in C?

What will be the result of: int a = 10, b = 3; int c = a % b; printf("%d", c);

What happens if you declare a variable but don't initialize it in C?

Consider: int *ptr = NULL; *ptr = 5; What will happen?

Which of the following is a correct way to declare a pointer to an integer in C?

What is the output of the following code: printf("%d", sizeof(int));

Which of the following correctly initializes a 2D array in C?

What will be the output of: char ch = 'A'; printf("%d", ch);

Which of the following is NOT a valid identifier in C?

What is the output of: int x = 5; int y = ++x + x++; printf("%d %d", x, y);

In C, what is the difference between single quotes and double quotes?

What is the output of: int a = 10, b = 20; a = a ^ b; b = a ^ b; a = a ^ b; printf("%d %d", a, b);