C Programming Questions and Answers – Macro Substitution – 2

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This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Macro Substitution – 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.     void main()
  3.     {
  4.         #define max 37;
  5.         printf("%d", max);
  6.     }

a) 37
b) Compile time error
c) Varies
d) Depends on compiler
View Answer

Answer: b
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.     void main()
  3.     {
  4.         #define max 37
  5.         printf("%d", max);
  6.     }

a) 37
b) Run time error
c) Varies
d) Depends on compiler
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.         #define const int
  5.         const max = 32;
  6.         printf("%d", max);
  7.     }

a) Run time error
b) 32
c) int
d) const
View Answer

Answer: b
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.         #define max 45
  5.         max = 32;
  6.         printf("%d", max);
  7.     }

a) 32
b) 45
c) Compile time error
d) Varies
View Answer

Answer: c
Explanation: None.

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

  1.     #include <stdio.h>
  2.     # define max
  3.     void m()
  4.     {
  5.         printf("hi");
  6.     }
  7.     void main()
  8.     {
  9.         max;
  10.         m();
  11.     }

a) Run time error
b) hi hi
c) Nothing
d) hi
View Answer

Answer: d
Explanation: None.

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

  1.     #include <stdio.h>
  2.     #define A 1 + 2
  3.     #define B 3 + 4
  4.     int main()
  5.     {
  6.         int var = A * B;
  7.         printf("%d\n", var);
  8.     }

a) 9
b) 11
c) 12
d) 21
View Answer

Answer: b
Explanation: None.

7. Which of the following Macro substitution are accepted in C?
a)

   #define A #define
   A VAR 20

b)

   #define A define
   #A VAR 20

c)

   #define #A #define
   #A VAR 20

d) None of the mentioned
View Answer

Answer: d
Explanation: None.

8. Comment on the output of the following C code.

  1.     #include <stdio.h>
  2.     #define var 20);
  3.     int main()
  4.     {
  5.         printf("%d\n", var
  6.     }

a) No errors, it will show the output 20
b) Compile time error, the printf braces aren’t closed
c) Compile time error, there are no open braces in #define
d) None of the mentioned
View Answer

Answer: a
Explanation: None.

9. Which of the following properties of #define is not true?
a) You can use a pointer to #define
b) #define can be made externally available
c) They obey scope rules
d) All of the mentioned
View Answer

Answer: d
Explanation: None.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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