C Language MCQ’S | C Preprocessor 3

11.
In which stage the following code

#include<stdio.h>
gets replaced by the contents of the file stdio.h

A. During editing
B. During linking
C. During execution
D. During preprocessing

 

12.
What will be the output?

#include<stdio.h>
#define SQR(x)(x*x)
int main()
{
int a, b=3;
a = SQR(b+2);
printf(“%d\n”, a);
return 0;
}

A. 25
B. 11
C. Error
D. Garbage value

 

13.
What will the SWAP macro in the following program be expanded to on preprocessing? will the code compile?

#include<stdio.h>
#define SWAP(a, b, c) (c t; t=a, a=b, b=t)
int main()
{
int x=10, y=20;
SWAP(x, y, int);
printf(“%d %d\n”, x, y);
return 0;
}

A. It compiles
B. Compiles with an warning
C. Not compile
D. Compiles and print nothing


14.
What will be the output of the program?

#include<stdio.h>
#define MAN(x, y) ((x)>(y)) ? (x):(y);

int main()
{
int i=10, j=5, k=0;
k = MAN(++i, j++);
printf(“%d, %d, %d\n”, i, j, k);
return 0;
}

A. 12, 6, 12
B. 11, 5, 11
C. 11, 5, Garbage
D. 12, 6, Garbage

15.
What will be the output of the program?

#include<stdio.h>
#define SQUARE(x) x*x

int main()
{
float s=10, u=30, t=2, a;
a = 2*(s-u*t)/SQUARE(t);
printf(“Result = %f”, a);
return 0;
}
A. Result = -100.000000
B. Result = -25.000000
C. Result = 0.000000
D. Result = 100.000000

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