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# Increment-Decrement Questions

NA
SHSTTON
176
Solv. Corr.
147
Solv. In. Corr.
323
Attempted
0 M:16 S
Avg. Time

1 / 45

What will be output of the following "c" code?
#include<stdio.h>
void main() {
int i=-1,j=-1,k=0,l=2,m;
m = i++ && j++ && k++ || l++;
printf("%d %d %d %d %d",i,j,k,l,m);
}

A0 0 1 3 1

B1 1 0 2 0

C2 2 1 3 1

DNone of these

E-1 -1 0 2 1

Answer: Option A

Explanation:

=>Logical operations always give a result of 1 or 0 .
=> Logical AND (&&) operator has higher priority over the logical OR (||) operator.

So the expression i++ && j++ && k++ is executed first. The result of this expression is 0 (-1 && -1 && 0 = 0)

Workspace

NA
SHSTTON
273
Solv. Corr.
171
Solv. In. Corr.
444
Attempted
1 M:36 S
Avg. Time

2 / 45

What will be output of the following "c" code?
#include<stdio.h>
void main(){
int i=5,j=10,num;
num=(++i,++j,i+j);
printf("%d  %d  %d",num,i,j);
}

A17 6 11

B6 6 11

C15 6 11

D15 5 10

ECompilation error

Answer: Option A

Explanation:

Int =5 is replace with 6, j=10 replace with 11,num;

Seen  below how it will

Num=(++I=1+5=6,++j=1+10=11,I+j=6+11=17);

Workspace

NA
SHSTTON
497
Solv. Corr.
214
Solv. In. Corr.
711
Attempted
0 M:19 S
Avg. Time

3 / 45

What will be output of the following "c" code?
#include<stdio.h>
void main()
{
int i=5;
printf("%d",i+++++i);
}

A5

B6

CCompiler Error

D7

Answer: Option C

Explanation:

The expression i+++++i is parsed as i ++ ++ + i which is an illegal combination of operators.

Workspace

NA
SHSTTON
108
Solv. Corr.
404
Solv. In. Corr.
512
Attempted
1 M:24 S
Avg. Time

4 / 45

What will be output of the following "c" code?
#include<stdio.h>
#include<conio.h>
void main(){
int a,i=4;
a=- -i+- -i+- -5;
printf("%d %d",a,i);
}

A13 4

B-3 2

C7 2

D-13 4

ECompilation error

Answer: Option A

Explanation:

void main()

{

int a,i=4;

int z=5;

\\*a=--i+--i+--5;*// error

a=--i+--i+--z;

printf("%d %d",a,i);}

answer

output  ia=8 i=2

Workspace

NA
SHSTTON
113
Solv. Corr.
241
Solv. In. Corr.
354
Attempted
0 M:53 S
Avg. Time

5 / 45

What will be output of the following "c" code?
#include<stdio.h>
int main()
{
int i=5,j=6,z;
printf("%d",i+++j);
return 0;
}

A12

B11

C13

DCompilation Error

ENone of these

Answer: Option B

Explanation:

the expression i+++j is treated as (i++ + j)

Workspace

NA
SHSTTON
66
Solv. Corr.
244
Solv. In. Corr.
310
Attempted
0 M:47 S
Avg. Time

6 / 45

What will be output of the following "c" code?
#include<stdio.h>
void main(){
int num,a=10;
num=a--- -a--;
printf("%d  %d",num,a);
}

A0 8

B0 10

C20 8

D-1 10

ECompilation error

Answer: Option C

Explanation:

int num,a=10;
num=a-- - -a--;  //  (10 - -9) =19   last a-- = 8 so final answer will be 19, 8
printf("%d %d",num,a);

Workspace

NA
SHSTTON
295
Solv. Corr.
52
Solv. In. Corr.
347
Attempted
0 M:4 S
Avg. Time

7 / 45

What will be output of the following "c" code?
#include<stdio.h>
#define plus +
#define minus +plus
int main(){
long x,i=3;
x=++i;
printf("%ld",x);
return 0;
}

A4

B3

C0

D6

ECompilation error

Answer: Option A

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
30
Solv. Corr.
232
Solv. In. Corr.
262
Attempted
0 M:30 S
Avg. Time

8 / 45

What will be output of the following "c" code?
#include<stdio.h>
void main(){
int a[]={5,10,15};
int i=0,num;
num=a[++i]+ ++i+(++i);
printf("%d",num);
}

A6

B17

C16

D12

ECompilation error

Answer: Option A

Explanation:

its answers is 15. here num=a[1]+2+3;

where a[1]=10

so answer will be

a=10+2+3

a=15;

Workspace

NA
SHSTTON
72
Solv. Corr.
251
Solv. In. Corr.
323
Attempted
0 M:22 S
Avg. Time

9 / 45

What will be output of the following "c" code?
#include<stdio.h>
void main(){
int num,a=5;
num=---a;
printf("%d  %d",num,a);
}

A-4 4

B3 3

C-4 5

D-10

ECompilation error

Answer: Option E

Explanation:

error: invalid lvalue in decrement

Workspace

NA
SHSTTON
38
Solv. Corr.
203
Solv. In. Corr.
241
Attempted
0 M:4 S
Avg. Time

10 / 45

What will be output of the following "c" code?
#include<stdio.h>
int main()
{
int i=5;
printf("%d %d %d %d %d %d",i++,i--,++i,--i,i);
return 0;
}

A5 4 4 5 4

B4 5 5 4 5

C4 5 5 5 5

DCompilation error

Answer: Option C

Explanation:

The arguments in a function call are pushed into the stack from left to right.
The evaluation is by popping out from the stack. and the evaluation is from right to left, hence the result.

Workspace

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