Regardless of which job you are going for, if your work requires coding you will be expected to have knowledge of C programming language. While there is a huge variety of all the possible questions an interviewer can ask you, it is always better to go throw some basic C interview questions beforehand. 

Here is a set of basic C interview questions that your interviewer might ask:

Explain the difference between Call by Value and Call by Reference?

When using Call by Value, we send the value of a variable as a parameter to a function. On the other hand, Call by Reference sends the address of the variable. Also, under Call by Value, the operations that take place cannot influence the value in the parameter. However, in the case of Call by Reference, values can be changed by the process within the function.

Some coders debug their programs by putting comment symbols on some codes instead of deleting it. How does this benefit in debugging?

Putting comment symbols around code is a way of separating some codes that you think might be creating errors in the program, without deleting the code. The reason behind this is that if the code is correct altogether, you solely remove the comment symbols and continue. It additionally spares you time and effort on retyping the codes if you have deleted it in the first place.

What is a stack?

A stack is a form of data structure. Data is stored in stacks using the First In Last Out approach. In any particular situation, only the top of the stack is available. This means that in order to recover data that is collected inside the stack, those on the upper part should be obtained first. 

Also, find a list of data structure interview questions & answers

What is a sequential access file?

When writing programs that will collect and recover data in a file, it is feasible to designate that file into different forms. A sequential access file is such that data is accumulated in sequential order. This means one data is going into the file after another. To access any data within the sequential access file, data has to be read one at a time, until we gain access to the right one.

What do you know about variable initialization and its importance?

Variable Initialization refers to the process when a variable gets an initial value before a program can use it. Without initialization, a variable will have an unknown value. This can lead to inconstant outputs when used in computations or other operations.

Differentiate Source Codes from Object Codes.

Source codes are codes that were drafted by the programmer. It comprises commands and other English-like keywords that instruct the computer on what to do. However, computers cannot understand source codes. Therefore, source codes are compiled using a compiler. And the resulting outputs are object codes, which are in a format that can be understood by the computer processor. Source codes are saved with the file extension .C, whereas object codes have the extension.OBJ

When do we use the “void” keyword in a function?

When declaring functions, you will determine whether that function would be restoring a value or not. If that function will not declare a value, such as when the idea of a function is to display some outputs on the screen, then “void” is to be located at the leftmost portion of the function header. When a return value is required after the function performance, the data type of the return value is fixed instead of “void”.

Also, find top MVC Interview Questions & Answers.  

Author: Washija

Washija is a content specialist at Receptix. She has an MBA in Tourism and a passion for creating web content. She is an avid reader, a traveler, and a versatile writer. She has been writing on the topics of education, career advice, and related areas for the past 3 years.

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