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Q:

What will be output when you will execute following c code?

#include <stdio.h>
void main()

{
    int const SIZE = 5;
    int expr;
    double value[SIZE] = { 2.0, 4.0, 6.0, 8.0, 10.0 };
    expr=1|2|3|4;
    printf ( "%f", value[expr] );
}

A) 2.000000 B) 4.000000
C) 8.000000 D) Compilation error
 
Answer & Explanation Answer: D) Compilation error

Explanation:

Size of any array in c cannot be constantan variable.

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Q:

What will be output of the following c program ?

#include

int main()

{

    int max-val=100;

    int min-val=10;

    int avg-val;

    avg-val =( max-val + min-val ) / 2;

    printf( "%d", avg-val );

    return 0;

}

A) 55 B) 105
C) 60 D) Compilation error
 
Answer & Explanation Answer: D) Compilation error

Explanation:

We cannot use special character – in the variable name.
Variable name can have only underscore.

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Q:

What will output when you compile and run the following code?

#include <stdio.h>
struct student
{

int roll;
int cgpa;
int sgpa[8];

};

void main()
{

struct student s = { 12,8,7,2,5,9 };
int *ptr;
ptr = (int *)&s;
clrscr();
printf( "%d", *(ptr+3) );
getch();

}

A) 8 B) 7
C) 2 D) Compiler error
 
Answer & Explanation Answer: C) 2

Explanation:
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Q:

What will be output when you will execute following c code?

#include <stdio.h>
void main()

{
     switch(2)

      {
            case 1L:printf("No");
            case 2L:printf("%s","I");
              goto Love;
            case 3L:printf("Please");
            case 4L:Love:printf("Hi");
     }
}

A) I B) IPleaseHi
C) IHi D) Compilation error
 
Answer & Explanation Answer: C) IHi

Explanation:

It is possible to write label of goto statement in the case of switch case statement.

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Q:

What will be output when you will execute following c code?

#include <stdio.h>
enum actor

{
    SeanPenn=5,
    AlPacino=-2,
    GaryOldman,
    EdNorton
};
void main()

{
     enum actor a=0;
     switch(a)

      {
         case SeanPenn:  printf("Kevin Spacey");
                         break;
         case AlPacino:  printf("Paul Giamatti");
                         break;
         case GaryOldman:printf("Donald Shuterland");
                         break;
         case EdNorton:  printf("Johnny Depp");
      } 
}

A) Kevin Spacey B) Paul Giamatti
C) Donald Shuterland D) Johnny Depp
 
Answer & Explanation Answer: D) Johnny Depp

Explanation:

Default value of enum constant
GaryOldman = -2 +1 = -1
And default value of enum constant
EdNorton = -1 + 1 = 0
Note: Case expression can be enum constant.

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Q:

What will be output when you will execute following c code?

#include <stdio.h>
void main()

{
    signed int a = -1;
    unsigned int b = -1u;
    if(a == b)
         printf( "The Lord of the Rings" );
    else
         printf( "American Beauty" );
}

A) The Lord of the Rings B) American Beauty
C) Compilation error: Cannot compare signed number with unsigned number D) Warning: Illegal operation
 
Answer & Explanation Answer: A) The Lord of the Rings

Explanation:
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Q:

The output of the code below is

        #include <stdio.h>
        int *m()
        {
            int *p = 5;
            return p;
        }
        void main()
        {
            int *k = m();
            printf("%d", k);
        }

A) 5 B) Junk value
C) 0 D) Error
 
Answer & Explanation Answer: A) 5

Explanation:
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Q:

 What is the output of this C code? 

        #include <stdio.h>
        void m()
        {
            printf("hi");
        }
        void main()
        {
            m();
        }

A) hi B) Run time error
C) None D) Varies
 
Answer & Explanation Answer: A) hi

Explanation:
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