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C Data Types 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 data types 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 data types to make your MNC interview very easy.

Data Types Questions and Answers

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

#include<stdio.h>
int main()
{
	char num = '\010';
	printf("%d", num);
	return 0;
}

x

Option: D

Explanation

The value of a variable num is '\010'. Which means the character with value 10 in octal, which is 8 in decimal.

✉ Answer

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

#include<stdio.h>
int main()
{
	void  num=10;
	printf("%v", num);
	return 0;
}

A. Compilation error✔

B. 10✘

C. Garbage value✘

D. 0✘

x

Option: A

Explanation

Void is not a valid data type for declaring variables.

✉ Answer

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

#include<stdio.h>
int main()
{
	void *ptr;
	int  num = 10;
	ptr = &num;
	printf("%d", ptr);
	return 0;
}

A. 10✘

B. Compilation error✘

C. 0✘

D. Address✔

x

Option: D

Explanation

Though, void is not a valid data type for declaring variables. It is a valid for declaring pointer variable *ptr thus printf displays the address of a normal variable num

✉ Answer

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

#include<stdio.h>
int main()
{
	printf("%d\t",sizeof(2.5));
	printf("%d\t",sizeof(2));
	printf("%d",sizeof('A'));
	return 0;
}

x

Option: B

Explanation

C compiler by default will assign any undeclared float data type as double. Thus 8 4 1 is outputted

✉ Answer

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

#include<stdio.h>
int main(){
	signed a;
	unsigned b;
	a = 6u + -16 + 16u + -6;
	b = a + 1;
	if(a == b)
	printf("%d %d",a,b);
	else
	printf("%u %u",a, b);
	return 0;
}

A. Compilation error✘

B. 0 0✘

C. 0 1✔

D. address address✘