Computer Knowledge - MCQ Practice Questions

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

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

In C, which function is used to read a string from input with space handling?

What is the purpose of the 'static' keyword when used with a variable inside a function?

Which of the following correctly represents a structure declaration in C?

What will be the final value of x: int x = 5; x += 3 * 2; printf("%d", x);

Which of the following operators has the highest precedence in C?

What will be printed: int i = 0; while(i < 3) { printf("%d ", i); i++; }

What is the correct syntax to free dynamically allocated memory in C?

What does the following code do: int *ptr = NULL;

What is the output of: printf("%f", $\frac{5}{2}$);

What does the sizeof() operator return in C?

What does the modulus operator (%) return when applied to negative numbers?

Which of the following statements about pointers is correct?

What is the correct way to declare a constant in C?

How many times will the following loop execute: for(int i=0; i<5; i++) { if(i==3) break; }

Which of the following is a correct way to initialize a pointer to NULL?

What is the output of the expression: $\frac{10}{3}$ * 3 in C?

What is the correct syntax to pass a 2D array to a function in C?

What will be printed by: int x = 5; printf("%d", ++x + x++);?