C Programming Test

Point out the correct statements are correct about the program below?

#include <stdio.h>

int main()
{
    char ch;
    while(x=0;x<=255;x++)
        printf("ASCII value of %d character %c\n", x, x);
    return 0;
}

Which of the following is the correct usage of conditional operators used in C?

What will be the output of the program?

#include <stdio.h>
int main()
{
    float d=2.25;
    printf("%e,", d);
    printf("%f,", d);
    printf("%g,", d);
    printf("%lf", d);
    return 0;
}

What will be the output of the program?

#include <stdio.h>
#include <math.h>
int main()
{
    float n=1.54;
    printf("%f, %f\n", ceil(n), floor(n));
    return 0;
}

If a function contains two return statements successively, the compiler will generate warnings. Yes/No ?

Point out the error in the program

#include<stdio.h>

int main()
{
    int i;
    #if A
        printf("Enter any number:");
        scanf("%d", &i);
    #elif B
        printf("The number is odd");
    return 0;
}

What will be the output of the program ?

 #include <stdio.h>

int main()
{
    float arr[] = {12.4, 2.3, 4.5, 6.7};
    printf("%d\n", sizeof(arr)/sizeof(arr[0]));
    return 0;
}

Is there any difference int the following declarations?

int fun(int arr[]);
int fun(int arr[2]);

What will be the output of the program (Turbo C in 16 bit platform DOS) ?

#include <stdio.h>
#include <string.h>

int main()
{
    char *str1 = "Hello";
    char *str2 = "World";
    char *str3;
    str3 = strcat(str1, str2);
    printf("%s %s\n", str3, str1);
    return 0;
}

Which of the following statements correct about the below program?

#include <stdio.h>

int main()
{
    union a
    {
        int i;
        char ch[2];
    };

    union a u1 = {512};
    union a u2 = {0, 2};

    return 0;
}

1:u2 cannot be initialized as shown.

2: u1 can be initialized as shown.

3:To initialize char ch[] of u2, the . operator should be used.

4:The code causes an error 'Declaration syntax error'