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C Functions Questions

In most of the MNC interview questions such as in ZOHO interview question, IVTL Infoview interview questions, Amazon interview questions, GOOGLE interview questions, Infosys interview questions and even in Voonik interview questions, We come across several Tricky C Questions about which 2:5 of the questions are from Functions in c. Solving that kind of tricky C questions is not an easy task for all C programmers. We need more practices to solve it with ease. So we provide 25+ interesting C questions in Functions to make your MNC interview very easy.

C Functions Questions

1. What will be the output of the C program?

#include<stdio.h>
int main()
{
	function();
	return  0;
}
void function()
{
	printf("Function in C is awesome");
}

A. Function in C is awesome✘

B. no output✘

C. Runtime error✘

D. Compilation error✔

x

Option: D

Explanation

Yes its a Compilation error, when compiler reads function(); it don't knew whether function() is available or not. So we have to initialize the function before main function.

✉ Answer

2. What will be the output of the C program?

#include<stdio.h>
int main()
{
	main();	
	return 0;
}

A. Runtime error✔

B. Compilation error✘

C. 0✘

D. none of the above✘

x

Option: A

Explanation

Yes its a runtime error, here the main() function repeatedly called the main() and the program never ends.

✉ Answer

3. What will be the output of the C program?

#include<stdio.h>
a() 
{
	printf("Function");
}
b()
{
	printf("Function in C");
}
c()
{
	printf("C function");
}
main()
{
	int (*ptr[3])();
	ptr[0] = a;
	ptr[1] = b;
	ptr[2] = c;
	ptr[2]();
	return 0;
}

A. Function✘

B. Function in C✘

C. C function✔

D. None of the above✘

x

Option: C

Explanation

Here *ptr is the pointer array variable of size 3. We assigned a value a, b, c to the arrray *ptr and then uses the value as the function which works for us.

✉ Answer

4. What will be the output of the C program?

#include<stdio.h>
int function();
main()
{
	int i;
	i = function();
	printf("%d", i);
	return 0;
}
function()
{
	int a;
	a = 250;
	return 0;
}

x

Option: B

Explanation

Eventhough we declared a variable a = 250;, we finally ask the compiler to return 0. Thus outputted 0.

✉ Answer

5. What will be the output of the C program?

#include<stdio.h>
int function();
main()
{
	int i;
	i = function();
	printf("%d", i);
	return 0;
}
function()
{
	int a;
	a = 250;
}

A. 250✘

B. 0✘

C. 1✔

D. Some Garbage value✘

x

Option: C

Explanation

Here function executed successfully and we don't return anything, by default C compiler returns 1 for its successful execution.

✉ Answer

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C Functions Questions