Placement Interview Question with answer in c Programming language

                                  

1.void main()

 {

  int d=5;

  printf("%f",d);

 }

output?

Ans: Undefined

Explanation:-

floating point formats not linked 

2.

void main()

{

  int i;

  for(i=1;i<4;i++)

  {

  switch(i)

  {

 case 1:

  printf("%d",i);

  break;

 case 2:

  printf("%d",i);

  break;

 case 3:

  printf("%d",i);

  break;

}

 switch(i) 

case 4:

printf("%d",i);

}

}

output:

Ans: 1,2,3

3.

void main()

  {

 char *s="\12345s\n";

 printf("%d",sizeof(s));

 }

output:-

2

4.

void main()

  {

 char *s="\12345s\n";

 printf("%d",sizeof(*s));

 }

output:-

1

5.

void main()

{

  unsigned i=1; /* unsigned char k= -1 => k=255; */

  signed j=-1; /* char k= -1 => k=65535 */

      /* unsigned or signed int k= -1 =>k=65535 */

 if(i

   printf("less");

 else if(i>j)

  printf("greater");

else if(i==j)

  printf("equal");

}

output:-less

Placement Technical C programming Question with answer

1.

int b=10;

  int *p=&b;

  *p++;

  printf("%d",*p);

what is the output?

output:- Garbage value 

2.

 int b=10;

  int *p=&b;

  ++*p;

  printf("%d",*p);

what is the output?

output:- 11

3. main()

{

char *a="hello";

char *b="bye";

char *c="hai";

int x=10,y=100;

c=(x

printf("%s",c);

}

whats the output?

output:-hello

4. main()

{

char *a="hello";

char *b="bye";

char *c="hai";

int x=10,y=100;

c=(x>y)?a:b;

printf("%s",c);

}

whats the output?

output:-

bye

5.

void main()

 {

  int a,b;

  a=sumdig(123);

  b=sumdig(123);

  printf("%d %d",a,b);

  getch();

 }

 int sumdig(int n)

  {

  static int sum;

  int d;

  if(n!=0)

  {

   d=n%10;

   n=(n-d)/10;

   sum=sum+d;

   sumdig(n);

  }

    return sum;

  }

whats the output?

output:-

6  12