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Top C Programming Interview Questions you Need to Master in 2023

Last updated on Nov 19,2022408.1K Views



Ravi KiranTech Enthusiast working as a Research Analyst at Edureka. Curious about learning...





Top C Programming Interview Questions you Need to Master in 2023





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C Programming Interview Questions have become a crucial part of the interview process in almost all MNC companies. This article is mainly focused on the most asked and the latest updated questions that are appearing in most of the current interviews. You will also get a mix of Basic to Advanced C Programming Interview Questions and Answers in this article.

Beginners C Programming Interview Questions

Intermediate C Programming Interview Questions

Advanced C Programming Interview Questions

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C Interview Questions

What are the basic Datatypes supported in C Programming Language?

What do you mean by Dangling Pointer Variable in C Programming?

What do you mean by the Scope of the variable? What is the scope of the variables in C?

What are static variables and functions?

Differentiate between calloc() and malloc()

What are the valid places where the programmer can apply Break Control Statement?

How can we store a negative integer?

Differentiate between Actual Parameters and Formal Parameters.

Can a C program be compiled or executed in the absence of a main()?

What do you mean by a Nested Structure?

Basic C Programming Interview Questions for Freshers



Q1. What are the basic Datatypes supported in C Programming Language?

Ans: The Datatypes in C Language are broadly classified into 4 categories. They are as follows:

Basic Datatypes

Derived Datatypes

Enumerated Datatypes

Void Datatypes

The Basic Datatypes supported in C Language are as follows:

Datatype NameDatatype SizeDatatype Rangeshort1 byte-128 to 127unsigned short1 byte0 to 255char1 byte-128 to 127unsigned char1 byte0 to 255int2 bytes-32,768 to 32,767unsigned int2 bytes0 to 65,535long4 bytes-2,147,483,648 to 2,147,483,647unsigned long4 bytes0 to 4,294,967,295float4 bytes3.4E-38 to 3.4E+38double8 bytes1.7E-308 to 1.7E+308long double10 bytes3.4E-4932 to 1.1E+4932

 

Q2. What do you mean by Dangling Pointer Variable in C Programming?

 

Ans: A Pointer in C Programming is used to point the memory location of an existing variable. In case if that particular variable is deleted and the Pointer is still pointing to the same memory location, then that particular pointer variable is called as a Dangling Pointer Variable.

 

Q3. What do you mean by the Scope of the variable? What is the scope of the variables in C?

Ans: Scope of the variable can be defined as the part of the code area where the variables declared in the program can be accessed directly. In C, all identifiers are lexically (or statically) scoped. 

 

Q4. What are static variables and functions?

Ans: The variables and functions that are declared using the keyword Static are considered as Static Variable and Static Functions. The variables declared using Static keyword will have their scope restricted to the function in which they are declared.

 

Q5. Differentiate between calloc() and malloc()

Ans: calloc() and malloc() are memory dynamic memory allocating functions. The only difference between them is that calloc() will load all the assigned memory locations with value 0 but malloc() will not.
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@kuldeepsingh_282
learn basics of C language like:

What is C Programming Langauge?

History of C language

C Basic Commands

Where is C used? Key Applications

Why learn C Language?

How C Programming Language Works?

History of C language

The base or father of programming languages is ‘ALGOL.’ It was first introduced in 1960. ‘ALGOL’ was used on a large basis in European countries. ‘ALGOL’ introduced the concept of standard for ‘C’ language in 1989. Later, it was Standards Organization (ISO) in 1990. ‘C’ programming language is also called as ‘ANSI C’.

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@kuldeepsingh_282
Searching technique refers to finding a key element among the list of elements.