Compilers Questions and Answers – Implementation of Increment and Decrement – 1

This set of Compilers Multiple Choice Questions & Answers (MCQs) focuses on “Implementation of Increment and Decrement – 1”.
1. What value does the variable b have after ALL of the code executes?

int a;
int b;
a=1;
b=a++;

a) 1
b) 2
c) 3
d) unknown/undefined
View Answer

2. What value does the variable a have after ALL of the code above executes?

int a;
int b;
a=1;
b=a++;

a) 1
b) 2
c) 3
d) unknown/undefined
View Answer

3. What value does the variable z have after ALL of the code above executes?

int x;
int y;
int z;
x=3;
y=4;
z = ++x * y++;

a) 9
b) 12
c) 16
d) 20
View Answer

4. What value does the variable x have after ALL of the code above executes?

int x;
int y;
int z;
x=3;
y=4;
z = ++x * y++;

a) 2
b) 3
c) 4
d) unknown/undefined
View Answer

5. What value does the variable y have after ALL of the code above executes?

int x;
int y;
int z;
x=3;
y=4;
z = ++x * y++;

a) 4
b) 5
c) 6
d) unknown/undefined
View Answer

6. What will be the output of the following program?

#include<stdio.h>
int main()
{
    int i = 10;
    printf("%d", ++(-i));
    return 0;
}

a) 11
b) 10
c) -9
d) None of the mentioned
View Answer

7. What will be output of the following C code?

#‎include‬ <stdio.h>
int main()
{
    int x=4, y, z;
    y = --x;
    z = x--;
    printf("%d, %d, %d\n", x, y, z);
    return 0;
}

a) 4,3,3
b) 3,3,3
c) 2,3,3
d) 4,4,3
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8. What will be output of the following C code?

#include <stdio.h>
main()
{
    int a=1, b=3;
    b= a++ + a++ + a++ + a++ + a++;
    printf("a=%d \n b=%d",a,b); 
}

a) a = 6, b = 15
b) a = 1, b = 3
c) a = 1, b = 15
d) a = 2, b = 4
View Answer

9. What will be output of the following C code?

#include <stdio.h>
main()
{
    int a=9, b=9;
    a=b++;
    b=a++;
    b=++b; 
    printf("%d %d",a,b);
}

a) 9,9
b) 10,10
c) 9,10
d) 10,9
View Answer

10. What will be output of the following C code?

#include <stdio.h>
main()
{  
     int a,b;
     b = 10;
     a = ++b + ++b;
     printf("%d%d",a,b);
}

a) 24,12
b) 23,12
c) 23,10
d) 24,10
View Answer

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