C++ Programming Interview Questions

C programming is a widely used programming language that helps developers create software systems. As such, it comes with a variety of interview questions that you might face during your job search. In this article, we provide you with tips on how to answer these questions effectively.

What is C programming?

C programming is a powerful programming language that enables developers to create powerful applications. C programming is designed for system programming, network programming, and low-level tasks. C programmers can write code for systems such as the Linux operating system and the Apple iPhone.

C programming is used in a variety of industries, from software development to telecommunications. C programmers can work on projects for companies such as Google, Facebook, and Amazon. C programming is also used in scientific computing and machine learning.

What are the different types of C programming?

Every programming language has its own unique features, so it’s important to be familiar with the different types of C programming. Here are three:

Asynchronous Programming: This type of programming is used to create programs that can run in parallel, or multiple times at the same time. For example, you might use asynchronous programming to process multiple orders at the same time.

Regular Expressions: Regular expressions are a powerful tool that can be used to match patterns in text. They’re often used in search engines and spam filters, and they can be helpful when dealing with data structures (such as arrays and strings).

Object-Oriented Programming: This type of programming is based on the idea that different objects can be treated as autonomous entities. This means that different parts of the program can be logically separated from each other.

What functions are in C?

In C, there are many functions that are available for use. Some of the most common functions include:

  • printf()
  • scanf()
  • malloc()
  • free()
  • memset()

How do you write a C program?

When you are programming in C, you use a lot of curly braces to tell the computer what to do. You start your program with a header that tells the computer where your main() function is and what type of data it will take as input. You then write your code inside the curly braces, like this:

main() { //code here }

When you are done with your code, you need to close the curly braces with a semicolon. Here’s an example:

main() { //code here; }

What do the different output lines of a C program mean?

When you run a C program, different output lines mean different things. The most common output line is the “stdout” line, which prints the text that’s being processed by the C program to your computer’s screen. Other lines might indicate errors or other information.

How do you read a C file?

C programming is a powerful and versatile language that can be used for a variety of purposes. One of the most common uses for C is in programming interviews.

In order to be a successful C programmer, it is important to be able to read and understand a C file. Here are some tips on how to do this:

1. Start by looking at the header section of the file. This will give you an overview of the contents of the file and where it is located on your computer.

2. Next, read through the code one line at a time. Pay attention to the purpose of each line and how it fits together.

3. Finally, look for any patterns or specific instructions that might be relevant to your job or project.

What are some common errors in C programming?

C programming is a powerful language, but it can be easy to make errors. Here are some common ones:

1. Not using quotation marks around string constants. This causes problems when the string is assigned to a variable or used in a conditional statement. For example, the following code will not compile:

char message[] = “Hello, world!”;

message = “Hello, world!”;

2. Using uninitialized memory. If you don’t initialize an array or structure member, the compiler will assume that it’s empty and will allocate space for you. Unfortunately, this can lead to errors if the array or structure contains sensitive data. For example:

int number;

number = 10;

3. Formatting data incorrectly. Incorrect formatting can cause unexpected results when you try to execute a program. For example, trying to parse an integer as a floating-point number can cause an error.


As a coder, you’re likely faced with interview questions on a regular basis. In this article, we’ve compiled some of the most common programming interview questions and provided tips on how to answer them. Whether you’re preparing for your first interview or just brushing up on some old skills, our advice should help put you in a strong position when it comes to answering difficult question.