C- arrays , pointers and functions and macros MCQs

Predict the output of below program:Assume that base address of arr is 2000 and size of integer

is 32 bit

#include <stdio.h>

int main()

{

int arr[5];

arr++;

printf("%u", arr);

return 0;

}

• 2002

• 2004

• 2020

• lvalue required

What is the output for a 64-bit Compiler?

# include <stdio.h>

void print(int arr[])

{

int n = sizeof(arr)/sizeof(arr[0]);

int i;

for (i = 0; i < n; i++)

printf("%d ", arr[i]);

}

int main()

{

int arr[] = {1, 2, 3, 4, 5, 6, 7, 8};

print(arr);

return 0;

}

• 1, 2, 3, 4, 5, 6, 7, 8

• Compiler Error

• 1 2

• Run Time Error

Predict the output of the below program:

#include <stdio.h>

#define SIZE(arr) sizeof(arr) / sizeof(*arr)

void fun(int* arr, int n)

{

    int i;

*arr += *(arr + n - 1) += 10;

}

void printArr(int* arr, int n)

{

    int i;

    for(i = 0; i < n; ++i)

        printf("%d ", arr[i]);

}

int main()

{

    int arr[] = {10, 20, 30};

    int size = SIZE(arr);

    fun(arr, size);

    printArr(arr, size);

    return 0;

}

• 20 30 40

• 20 20 40

• 50 20 40

• Compile-time error

Predict output of following program

int main()

{

    int i;

    int arr[5] = {1};

    for (i = 0; i < 5; i++)

        printf("%d ", arr[i]);

    return 0;

}

• 1 followed by four garbage values

• 1 0 0 0 0

• 1 1 1 1 1

• 0 0 0 0 0

What will be the output of the following C code?

    #include <stdio.h>

    int main()

    {

        int one = 1, two = 2;

        #ifdef next

        one = 2;

        two = 1;

        #endif

        printf("%d, %d", one, two);

    }

• 2, 1

• 1, 2

• 1, 1

• 2, 2

What will be the output of the following C code?

#include<stdio.h>

void main(){

    #ifndef max

    printf("hello");

    #endif

    printf("hi");}

• hellohi

• hello

• hi

• error

. What will be the output of the following C code?

#include<stdio.h>

#define max 100

void main(){

    #if(max%10)

    printf("Bye");

    #endif

    printf("Hi");}

• error

• Bye

• Hi

• ByeHi

What will be the output of the following C code?

#include<stdio.h>

#define sf 10

int main(){

    if(sf==100)

        printf("good");

    else

    {

        printf("bad");

        sf=100;

    }

    printf("%d",sf);

return 0;}

• 10

• 100

• error

• bad

What will be the output of the following C code?

#define sqr(x) x*x

main(){

    int a1;

    a1=25/sqr(5);

    printf("%d",a1);}

• 25

• error

• 5

• 1

 What will be the output of the following C code?

    #include <stdio.h>

    int main()

    {

        int i = 10;

        void *p = &i;

        printf("%f\n", *(float *)p);

        return 0;

    }

• 10

• Undefined behaviour

• Compile time error

• 0.000000