C Programming - Bitwise Operators

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Which of the following statements are correct about the program?

#include<stdio.h>

int main()
{
    unsigned int num;
    int i;
    scanf("%u", &num);
    for(i=0; i<16; i++)
    {
        printf("%d", (num<<i & 1<<15)?1:0);
    }
    return 0;
}

It prints all even bits from num

It prints all odd bits from num

It prints binary equivalent num

Error

Which of the following statements are correct about the program?

#include<stdio.h>

int main()
{
    unsigned int num;
    int c=0;
    scanf("%u", &num);
    for(;num;num>=1)
    {
        if(num & 1)
            c++;
    }
    printf("%d", c);
    return 0;
}

It counts the number of bits that are on in the number num.

It sets all bits in the number num to 1

It sets all bits in the number num to 0

Error

Which of the following statements are correct about the program?

#include<stdio.h>
char *fun(unsigned int num, int base);

int main()
{
    char *s;
    s=fun(128, 2);
    s=fun(128, 16);
    printf("%s\n",s);
    return 0;
}
char *fun(unsigned int num, int base)
{
    static char buff[33];
    char *ptr = &buff[sizeof(buff)-1];
    *ptr = '\0';
    do
    {
        *--ptr = "0123456789abcdef"[num %base];
        num /=base;
    }while(num!=0);
    return ptr;
}

It converts a number to a given base.

It converts a number to its equivalent binary.

It converts a number to its equivalent hexadecimal.

It converts a number to its equivalent octal.

Which of the following statements are correct about the program?

#include<stdio.h>

int main()
{
    unsigned int m[] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80};
    unsigned char n, i;
    scanf("%d", &n);
    for(i=0; i<=7; i++)
    {
        if(n & m[i])
            printf("yes");
    }
    return 0;
}

It will put OFF all bits that are ON in the number n

It will test whether the individual bits of n are ON or OFF

It will put ON all bits that are OFF in the number n

It will report compilation errors in the if statement.