C Programming Questions and Answers – Increment and Decrement Operators – 2

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This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Increment and Decrement Operators – 2”.

Pre-requisite for this C MCQ set: Advanced C Programming Video Tutorial.

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

  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         int i = 0;
  5.         int x = i++, y = ++i;
  6.         printf("%d % d\n", x, y);
  7.         return 0;
  8.     }

a) 0, 2
b) 0, 1
c) 1, 2
d) Undefined
View Answer

Answer: a
Explanation: None.
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2. What will be the output of the following C code?

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  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         int i = 10;
  5.         int *p = &i;
  6.         printf("%d\n", *p++);
  7.     }

a) 10
b) 11
c) Garbage value
d) Address of i
View Answer

Answer: a
Explanation: None.
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3. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     void main()
  3.     {
  4.         int x = 97;
  5.         int y = sizeof(x++);
  6.         printf("X is %d", x);
  7.     }

a) X is 97
b) X is 98
c) X is 99
d) Run time error
View Answer

Answer: a
Explanation: None.
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4. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     void main()
  3.     {
  4.         int x = 4, y, z;
  5.         y = --x;
  6.         z = x--;
  7.         printf("%d%d%d", x,  y, z);
  8.     }

a) 3 2 3
b) 2 3 3
c) 3 2 2
d) 2 3 4
View Answer

Answer: b
Explanation: None.

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

  1.     #include <stdio.h>
  2.     void main()
  3.     {
  4.         int x = 4;
  5.         int *p = &x;
  6.         int *k = p++;
  7.         int r = p - k;
  8.         printf("%d", r);
  9.     }

a) 4
b) 8
c) 1
d) Run time error
View Answer

Answer: c
Explanation: None.

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

  1.  #include <stdio.h>
  2.     void main()
  3.     {
  4.         int a = 5, b = -7, c = 0, d;
  5.         d = ++a && ++b || ++c;
  6.         printf("\n%d%d%d%d", a,  b, c, d);
  7.     }

a) 6 -6 0 0
b) 6 -5 0 1
c) -6 -6 0 1
d) 6 -6 0 1
View Answer

Answer: d
Explanation: None.

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

  1.     #include <stdio.h>
  2.     void main()
  3.     {
  4.         int a = -5;
  5.         int k = (a++, ++a);
  6.         printf("%d\n", k);
  7.     }

a) -4
b) -5
c) 4
d) -3
View Answer

Answer: d
Explanation: None.

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