C Programming – Basics of Functions

C Programming - Basics of Functions

Question 1

What is the output of this C code?

 #include 
 int main()
 {
 void foo();
 printf("1 ");
 foo();
 }
 void foo()
 {
 printf("2 ");
 }

A	1 2
B	Compile time error
C	1 2 1 2
D	Depends on the compiler

Question 2

What is the output of this C code?

#include 
int main()
{
void foo(), f();
f();
}
void foo()
{
printf("2 ");
}
void f()
{
printf("1 ");
foo();
}

A	Compile time error as foo is local to main
B	1 2
C	2 1
D	Compile time error due to declaration of functions inside main

Question 3

What is the output of this C code?

 #include 
 int main()
 {
 void foo();
 void f()
 {
 foo();
 }
 f();
 }
 void foo()
 {
 printf("2 ");
 }

A	2 2
B	2
C	Compile time error
D	Depends on the compiler

Question 4

What is the output of this C code?

#include 
void foo();
int main()
{
void foo();
foo();
return 0;
}
void foo()
{
printf("2 ");
}

A	Compile time error
B	2
C	Depends on the compiler
D	Depends on the standard

Question 5

What is the output of this C code?

#include 
void foo();
int main()
{
void foo(int);
foo(1);
return 0;
}
void foo(int i)
{
printf("2 ");
}

A	2
B	Compile time error
C	Depends on the compiler
D	Depends on the standard

Question 6

What is the output of this C code?

 #include 
 void foo();
 int main()
 {
 void foo(int);
 foo();
 return 0;
 }
 void foo()
 {
 printf("2 ");
 }

A	2
B	Compile time error
C	Depends on the compiler
D	Depends on the standard

Question 7

What is the output of this C code?

  include 
  void m()
  {
  printf("hi");
  }
  void main()
  {
  m();
  }

A	hi
B	Run time error
C	Nothing
D	Varies

Question 8

What is the output of this C code?

  include 
  void m()
  {
  printf("hi");
  }
  void main()
  {
  m();
  }

A	hi
B	Run time error
C	Nothing
D	Varies

Question 9

What is the output of this C code?

#include 
void m();
void n()
{
m();
}
void main()
{
void m()
{
printf("hi");
}
}

A	hi
B	Compile time error
C	Nothing
D	Varies

Question 10

What is the output of this C code?

#include 
void main()
{
m();
void m()
{
printf("hi");
}
}

A	hi
B	Compile time error
C	Nothing
D	Varies

Question 11

What is the output of this C code?

#include 
void main()
{
m();
}
void m()
{
printf("hi");
m();
}

A	Compile time error
B	hi
C	Infinite hi
D	Nothing

Question 12

What is the output of this C code?

#include 
void main()
{
static int x = 3;
x++;
if (x <= 5)
{
printf("hi");
main();
}
}

A	Run time error
B	hi
C	Infinite hi
D	hi hi

Question 13

Which of the following is a correct format for declaration of function?

A	return-type function-name(argument type);
B	return-type function-name(argument type) {}
C	return-type (argument type)function-name;
D	Both (a) and (b)

Question 14

 Which of the following function declaration is illegal?

A	int 1bhk(int);
B	int 1bhk(int a);
C	int 2bhk(int*, int []);
D	All of the mentioned

Question 15

Which function definition will run correctly?

A	int sum(int a, int b) return (a + b);
B	int sum(int a, int b) {return (a + b);}
C	int sum(a, b) return (a + b);
D	Both (a) and (b)

Question 16

Can we use a function as a parameter of another function? [ Eg: void wow(int func()) ]

A	Yes, and we can use the function value conveniently
B	Yes, but we call the function again to get the value, not as convenient as in using variable
C	No, C does not support it.
D	This case is compiler dependent

Question 17

 The value obtained in the function is given back to main by using ________ keyword?

A	return
B	static
C	new
D	volatile

Check Your Answers:

  1.  A

  2. B

  3. D

  4. B

  5. A

  6. B

  7. A

  8. A

  9. B

10. B

11. C

12. D

13. A

14. D

15. B

16. C

17. A

 

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