C Language Placement papers

1. What are the outputs?

main()
{
    int i;
    printf("%d", &i)+1;
    scanf("%d", i)-1;
}



a. Runtime error.
b. Runtime error. Access violation.
c. Compile error. Illegal syntax
d. None of the above

Ans : d

printf( ) prints address/garbage of i,
scanf() dont have & sign, so scans address for i
+1, -1 dont hav any effect on code

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2. What are the outputs?

 #include<stdio.h>

 #define SQR(x) x * x

 main()

 {

   printf("%d", 225/SQR(15));

 }

a. 1
b. 225
c. 15
d. none of the above

Ans : b

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3. What are the outputs?

#include<stdio.h>

main()

{

 int i, j;

 scanf("%d %d"+scanf("%d %d", &i, &j));

 printf("%d %d", i, j);

}

a. Runtime error.
b. 0, 0
c. Compile error
d. the first two values entered by the user

Ans: d) two values entered, 3rd will be null pointer assignment

4. What are the outputs?

#include<stdio.h>

main()

{

            printf("%d, %d", sizeof('c'), sizeof(100));

}

a. 1, 2
b. 2, 100
c. 4, 100
d. 4, 4

Ans : 1, 2

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5. What are the outputs?

#include<stdio.h>

main()

{

  int i = 100;

  printf("%d", sizeof(sizeof(i)));

}

a. 2
b. 100
c. 4
d. none of the above

Ans a

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6. What are the outputs?

#include<stdio.h>

void main ()

{

 int x = 10;

 printf ("x = %d, y = %d", x--,x++);

}

a. 10, 10
b. 10, 9
c. 10, 11
d. none of the above

Output: x=11, y=10

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7. What are the outputs?

#include<stdio.h>

main()

{

            int i =10, j = 20;

            printf("%d, %d, ", j-- , --i);

            printf("%d, %d ", j++ , ++i);

}

a. 20, 10, 20, 10
b. 20, 9, 20, 10
c. 20, 9, 19, 10
d. 19, 9, 20, 10 

Ans C

8. What are the outputs?

 #include<stdio.h>

 main()

{          if ((1||0) && (0||1))

            {

                        printf("OK I am done.");

            }

            else

            {

                        printf("OK I am gone.");

            }

}

a. OK I am done
b. OK I am gone
c. compile error
d. none of the above

Ans a

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9. What are the outputs?

#include<stdio.h>

  void main(){

            int j=320;

            char *p=(char *)&j;

            printf("%d",*p);

}

Ans 64

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10 What are the outputs?

#include<stdio.h>

#define x 5+2

void main(){

             int i;

             i=x*x*x;

             printf("%d",i);

}

Ans 27

(i=5+2*5+2*5+2

=5+10+10+2

=27

)

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11. What are the outputs?

#include<stdio.h>

 void main()

 {

             char c=125;

             c=c+10;

             printf("%d",c);

}

Ans –121

(Char value range +127 to –128, print in cycle order. 125+1= 126,125+2= 127,125+3=-128,125+4=-127,125+5=-126,125+6=-125,125+7=-124,125+8=-123,

125+9=-122,125+10=-121)

12. What are the outputs?

 #include<stdio.h>

 void main(){

  float i=4.5;

   if(i==4.5)

              printf("Equal to(==)");

   else if(i<4.5)

              printf("Less than(<)");

   else

              printf("Greater than(>)");

}

Ans: Equal to(==)

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13.What are the outputs?

#include<stdio.h>

 void main(){

  int i=4,x;

  x=++i + ++i + ++i;

  printf("%d",x);

}

Ans 21(x=++i + ++i + ++i= 7 +7+7)

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14. What are the outputs?

#include<stdio.h>

 void main(){

  int x;

  for(x=1;x<=5;x++);

             printf("%d",x);

}

Ans: 6

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15. What are the outputs?

#include<stdio.h>

main()

{

  float me = 1.1;

  double you = 1.1;

  if(me==you)

  printf("I love you");

  else

  printf("I hate you");

}

Ans : I hate you

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16. What are the outputs?

#include<stdio.h>

#define clrscr() 100

main()

{

            clrscr();

            printf("%d\n",clrscr());

}

Ans: 100