Computer Knowledge - MCQ Practice Questions

Consider a structure with bit fields. What will be the size of the following structure in bytes? struct demo { unsigned int a : 5; unsigned int b : 3; unsigned int c : 4; unsigned int d : 7; };

What is the purpose of the volatile keyword in C?

In a B-tree of order m, what is the maximum number of children a non-leaf node can have?

What is the output of the following C code? #include <stdio.h> int main() { int a = 5; printf("%d %d %d", a++, ++a, a); return 0; }

What is the correct way to declare a constant pointer to a constant integer?

Consider the following C code. What will be printed? int arr[3][3] = {{1,2,3}, {4,5,6}, {7,8,9}}; int *ptr = (int *)arr; printf("%d", *(ptr + 5));

What is the output of the following C code? #define MAX 5 int main() { int arr[MAX]; printf("%d", sizeof(arr)/sizeof(arr[0])); return 0; }

What is the difference between struct and union in C?

What will be the output of: int x = 5; printf("%d", ++x);?

Consider a pointer ptr pointing to an integer array. What does ptr[2] represent?

What is the time complexity of searching for an element in an unsorted array using linear search?

What will be the result of executing: int a = 5, b = 10; int *ptr = &a; ptr = &b; printf("%d", *ptr);?

Which of the following statements about static variables is TRUE?

What happens when you try to access an array element beyond its size in C?

Which of the following is the correct way to pass a string to a function in C?

Which of the following is an invalid identifier in C?

What will be the output of: int x = 5; printf("%d %d", x++, ++x);?

What is the difference between structure and union in C?

Which of the following function declarations is correct for a function that takes no parameters and returns no value?

In C, what is the purpose of the typedef keyword?