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C Preprocessor Questions

NA
SHSTTON
0
Solv. Corr.
34
Solv. In. Corr.
34
Attempted
0 M:0 S
Avg. Time

21 / 34

Choose the correct option.

Consider the macro definitions

#define square (x) x*x
and #define square (x) (x*x)

when used in a program statement B=++square(C)


Athey will produce the same result

Bthey will produce not the same result

Cthe second definition is not legal

DNone of these

Answer: Option D

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
4
Solv. Corr.
26
Solv. In. Corr.
30
Attempted
0 M:0 S
Avg. Time

22 / 34

The output of the following program is
#define two (x) 2*x
#define ddouble (x) x + x

void main()
{
int num, sum, product;
num = 1;
sum = - two (num); sum = -(sum + 1);
product = - ddouble (num);

printf ("%d%d/n" ,sum,product);
}

A0 0

B0 1

C1 1

D1 0

Answer: Option A

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
6
Solv. Corr.
20
Solv. In. Corr.
26
Attempted
0 M:0 S
Avg. Time

23 / 34

Choose the correct option.

Which of the following is not true about preprocessor directives


AThey begin with a hash symbol

BThey are processed by a preprocessor

CThey form an integral part of the code

DThey have to end with a semi colon

Answer: Option A

Explanation:

Pre-processor directive cannot end with a semicolon so the option D is correct here. Because pre-processor directives are lines included in a program that begins with the character #.

Workspace

NA
SHSTTON
5
Solv. Corr.
24
Solv. In. Corr.
29
Attempted
0 M:0 S
Avg. Time

24 / 34

What's wrong? (x = 4 && y = 5) ? (a = 5) ; (b = 6);


Athe question mark should be an equal sign

Bthe first semicolon should be a colon

Cthere are too many variables in the statement

Dthe conditional operator is only used with apstrings

Answer: Option D

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
28
Solv. Corr.
3
Solv. In. Corr.
31
Attempted
0 M:0 S
Avg. Time

25 / 34

What are the value sprinted by the following program?
#define dprint(expr)printf(#expr "=%d\n",expr)
main() {
     int x=7;
     int y=3;
     dprintf(x/y);
}

A#2 = 2

Bexpr=2

Cx/y=2

DNone of these

Answer: Option C

Explanation:

It will simply give value after division of x/y which is 2. Because, in #define dprint(expr) expr is (x/y=?). So, the final answer will be x/y=2.

Workspace

NA
SHSTTON
83
Solv. Corr.
84
Solv. In. Corr.
167
Attempted
0 M:0 S
Avg. Time

26 / 34

The output of the following program is
#include<stdio.h>
#define maxval 5 
int main (void)
{
int i=1;
if(i-maxval)
{
printf("inside");
}
else
{
printf("out?");
}
}
What will be printed.

Aout

Binside

CError

DNone of these

Answer: Option B

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
90
Solv. Corr.
71
Solv. In. Corr.
161
Attempted
0 M:0 S
Avg. Time

27 / 34

#include
#define a 3+3
#define b 11-3
void main()
{
printf("%d",a*b);
}
What will be printed.


A33

B32

CError

DNone of these

Answer: Option A

Explanation:

Here, in #define a 3+3 & #define b 11+3 it will take only first values from both i.e. 3 & 11. So, a*b value will be 3*11=33.

Workspace

NA
SHSTTON
32
Solv. Corr.
120
Solv. In. Corr.
152
Attempted
0 M:0 S
Avg. Time

28 / 34

Macros and function are related in what aspect?


Arecursion

Bvarying no of arguments

Chypochecking

Dtype declaration

Answer: Option B

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
57
Solv. Corr.
97
Solv. In. Corr.
154
Attempted
0 M:0 S
Avg. Time

29 / 34

Preproconia does not do which one of the following


Amacro

Bconditional compliclation

Cin type checking

Dincluding load file

Answer: Option C

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
79
Solv. Corr.
61
Solv. In. Corr.
140
Attempted
0 M:0 S
Avg. Time

30 / 34

Find the output for the following C program

#define d 10+10
main()
{
printf("%d",d*d);
}


A120

B400

C210

DNone of the above

Answer: Option A

Explanation:

d*d will be replaced by 10+10*10+10 during run-time. So, answer is 10+100+10 = 120

Workspace

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