C Data Types

Question 1

Predict the output of following program. Assume that the numbers are stored in 2\'s complement form.

C

#include<stdio.h> 
int  main() 
{ 
   unsigned int x = -1; 
   int y = ~0; 
   if (x == y) 
      printf(\"same\"); 
   else
      printf(\"not same\"); 
   return 0; 
}

• same
• not same

Question 2

Which of the following is not a valid declaration in C?

C

1. short int x;

C

2. signed short x;

C

3. short x;

C

4. unsigned short x;

• 3 and 4
• 2
• 1
• All are valid

Question 3

Predict the output

C

#include <stdio.h>

int main()
{
   float c = 5.0;
   printf (\"Temperature in Fahrenheit is %.2f\", (9/5)*c + 32);
   return 0;
}

• Temperature in Fahrenheit is 41.00
• Temperature in Fahrenheit is 37.00
• Temperature in Fahrenheit is 0.00
• Compiler Error

Question 4

Predict the output of following C program

C

#include <stdio.h>
int main()
{
    char a = 012;

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

    return 0;
}

• Compiler Error
• 12
• 10
• Empty

Question 5

In C, sizes of an integer and a pointer must be same.

• True
• False

Question 6

Output?

C

int main()
{
    void *vptr, v;
    v = 0;
    vptr = &v;
    printf(\"%v\", *vptr);
    getchar();
    return 0;
}

• 0
• Compiler Error
• Garbage Value

Question 7

Assume that the size of char is 1 byte and negatives are stored in 2\'s complement form

C

#include<stdio.h>
int main()
{
    char c = 125;
    c = c+10;
    printf(\"%d\", c);
    return 0;
}

• 135
• +INF
• -121
• -8

Question 8

C

#include <stdio.h>
int main()
{
    if (sizeof(int) > -1)
        printf(\"Yes\");
    else
        printf(\"No\");
    return 0;
}

• Yes
• No
• Compiler Error
• Runtime Error

Question 9

Output of following program?

C

#include<stdio.h>
int main()
{
    float x = 0.1;
    if ( x == 0.1 )
        printf(\"IF\");
    else if (x == 0.1f)
        printf(\"ELSE IF\");
    else
        printf(\"ELSE\");
}

• ELSE IF
• IF
• ELSE

Question 10

Suppose n and p are unsigned int variables in a C program. We wish to set p to ⁿC₃. If n is large, which of the following statements is most likely to set p correctly?

• p = n * (n-1) * (n-2) / 6;
• p = n * (n-1) / 2 * (n-2) / 3;
• p = n * (n-1) / 3 * (n-2) / 2;
• p = n * (n-1) * (n-2) / 6.0;