C programming

What is the range of value that can be stored by int data types in C?

• -(2^31) to (2^31)-1

• -256 to 255

• -(2^63) to (2^63)-1

• 0 to (2^31)-1

Answer explanation

-(2^31) to (2^31)-1

What will be the output of the following code snippet?

#include<studio.h>

int main(){

int a=3, b=5;

int t = a;

a = b;

b = t;

printf("%d%d",a,b);

return 0;

}

• 3 4

• 3 3

• 5 5

• 5 3

Answer explanation

5 3

How is an array initialized in C language:

• int a[3] = {1,2,3};

• int a = {1,2,3};

• int a[] = new int [3];

• int a(3) = [1,2,3];

Answer explanation

int a[3] = {1,2,3};

How is the 3rd element in an array accessed based on pointer notation?

• *a+3

• *(a+3)

• *(*a+3)

• &(a+3)

Answer explanation

*(a+3)

How are String represented in memory in C?

• An array of characters.

• The object of some class.

• Same as other primitive data types.

• LinkedList of characters.

Answer explanation

An array of characters.

What is the disadvantage of arrays in C?

• The amount of memory to be allocated should be known beforehand.

• Elements of an array can be accessed in constant time.

• Elements are stored in contiguous memory blocks.

• Multiple other data structures can be implemented using arrays.

Answer explanation

The amount of memory to be allocated should be known beforehand.

Which of the following is an exit controlled loop?

• While loop.

• For loop.

• do-while loop.

• None of the above.

Answer explanation

do-while loop.

How to declare a double-pointer in C?

• int *val

• int **val

• int &val

• int *&val

Answer explanation

int **val

If p is an integer pointer with a value 1000, then what will the value of p + 5 be?

• 1020

• 1005

• 1004

• 1010

Answer explanation

1020

What will be the output of the following code snippet?

#include <stdio.h>

#define VAL 3 * (2 + 6)

void solve() {

int a = 10 + VAL;

printf("%d", a);

}

int main() {

solve();

return 0;

}

• 104

• 24

• 10

• 34

Answer explanation

34