80+ C Programming Interview Questions and Answers For Freshers & Experienced (With Free PDF)

80+ C Programming Interview Questions and Answers For Freshers & Experienced (With Free PDF)

C language is a general-purpose and high-level programming language. This is the primary language needed in developing and operating systems.

Programs written in C language can be transferred to similar machines without the source code. This language can be used to control the low-level operations of a computer.

If you are aiming for a job in MNC, startup, or SMB (small and medium business), as a C language expert or C Programmer, it is crucial to crack the job interview. For this purpose, you must prepare for the most common interview questions for C programming.

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In this comprehensive and detailed guide, we have covered the most asked C programming interview questions and answers for freshers and experienced.

Table of Contents

Introduction to C Programming

The first thing you must know is the definition of C programming. This interview Q&A will take you through the basics of C language to make you market-ready with questions that are frequently asked in an interview for C programming.

As mentioned above, C is a high-level programming language that is also called the mother language. It is the base language for many modern languages like C++, C#, Java, etc.

Many compilers, including JVMs and Kernels, are based on C language and follow the syntax used in the C. Many common and basic concepts like functions, arrays, and strings are used in various languages and also came from the C language.

c interview questions and answers

What is the Scope of C Language in 2024?

Programmers with a strong command over C can control every operation on a computer. There are many programmers that are making huge money with C programming. The demand for C programmers is not declining anytime soon.

This language is widely used and used for creating network drivers, operating systems, etc. C language will always stay in demand as it is the mother language of many languages that are used lately.

There are several areas where only C is used for coding and it can not be replaced by another language.

If you are looking for a career scope in C programming at the application level, it is continuously being replaced by new and modern languages. C, at the system level, is still used, and it is not slowing down in the near future.

C Programming Skills to Have

For building a career in the C language, you must have these skills:

Things to Know While Preparing for C Interview Questions and Answers

Any development job requires coding knowledge of the C language. Most employers start with basic C programming questions in the interview.

Here you will get to know about the best C language interview questions and answers that will help you get a job very easily. You should know how to face technical questions and impress the employer.

In addition, you must stay prepared for the interview by looking at the most asked C interview questions and answers. Keep the demand of the employer in mind to crack the interview.

Get to know what they need from you as a C programmer and prepare with questions according to that.

Learn Basics of C Programming for Interview

Dennis Ritchie of the USA is known as the founder of C language, as he developed it in the year 1972.

C has a very rich set of library functions, and it is a machine-independent language. It is the ideal choice for developing firmware or portable applications.

The C language is very useful for the internal architecture of a computer. It is very helpful in understanding the working of other programming languages.

Basic C Interview Questions and Answers for Freshers

C languages help in understanding the data types and variables. You will know how to write different pieces of code and get a high-quality programming job.

Go through these top C language interview questions for freshers and get market-ready with your skillset in the programming language. In this detailed guide, let’s get started with the most asked and basic questions first to help you become ready to kickstart your career.

c programming interview questions and answers

1. Who developed C Programming language?

A computer scientist named Dennis Ritchie from the USA developed the C programming language. He developed this with the help of his colleague Ken Thompson.

2. When was C language invented?

It was invented in 1972.

3. Why is C known as the mother language?

It is the mother of most of the JVMs and compilers. Most of the languages use functions from this language. It has concepts like arrays, functions, file handling, etc.

4. What do you understand by local and global variables in C?

Global variables are declared outside the function, and the scope of a variable is available till the end of the program. Local variables are declared inside the function, and the scope is available in these variables.

The life of the local variable is created when the block is entered and ends on exit, but the life of a global variable exists until the execution of the program.

Local variables are stored in a stack unless specified, and the compiler decides the storage location of a variable in global ones. So, these are the differences between a local and global variable in C.

Advanced C Programming Interview Questions and Answers for Experienced

If you are working in the industry as a C Programmer and want a job upgrade that tests your skills as a developer, you should possess some advanced skills.

Here are some of the most asked common C interview questions for experienced professionals that will help you understand the concept and get a smooth switch to high-paying jobs.

1. What is the difference between calloc() and malloc() in C programming?

Both calloc() and malloc() are used for allocating memory functions. The only difference is that calloc() loads the memory location, but malloc() will not.

2. Can you execute a C program without using the main() function?

For the execution of a C program, the main() function is needed. Without this function, the program will be compiled but can not be executed.

3. What is a preprocessor in the C programming language?

It is considered a predefined function in a C program. It is used as a directive to the compiler and executed before the execution of a program.

4. Tell me the difference between interpreter and compiler in C.

A compiler translates the code into the machine code and it is used in C language. The interpreter is used in other high-level languages to compile code in line by line method.

Jobs for C Programmers (Top Companies Hiring)

There are many companies that are hiring C programmers. Here are some of the best jobs with C programming in the big companies that can make your career. C is one of the top-ranked programming languages in the world. A high number of companies use it to write embedded codes.

Scope in C is not coming down anytime soon. It is because C programming helps in system analysis and project management.

Software that is developed with the help of C language is used to control the flow of data and store it for further operations. The new generation technologies like AI and ML also require knowledge of the C language.

C language also has its applications in fields like network drivers, databases, compilers, operating systems, etc. are made in C language. It is helpful in understanding the variables and data types.

There are plenty of companies that are hiring C programming experts. Here are the top companies hiring C developers at a good annual package.

These companies are hiring C engineers, freshers, and experienced regularly and you can get a quality job at a decent package in these big brands and government agencies.

C Programming Jobs Salary in India

Apart from technical jobs in the development sector, a C programmer has a ton of opportunities in India. They can work as a teacher and can grab government jobs in teaching and other sectors.

The demand in the development sector is not slowing down as all the emerging technologies also require a strong knowledge of coding in C. A developer can work as a:

C programmer salary in India can vary from INR 2 Lakhs to INR 15 Lakhs. The average salary of a C programmer is around INR 5 to 6 Lakhs in the country.

How to Learn C Programming Online?

The internet has changed the way technology can reach more hands. With plenty of courses available online, you can purchase the course from the best online coaching institute in the C language.

We are the primary name that provides a C programming course online with certificate which has significant importance and possesses value globally.

FAQs Related to Interview Questions for C Programming

Can I get a job with C programming?

Yes, you can. There are many companies that hire C programmers. You can also find a job in the government sector or teaching sector with skills in C.

What is the salary of a C programmer?

The salary of a C programmer ranges from INR 2 LPA to INR 15 LPA in India.

Is C Programming still in demand?

Yes. C is the mother of all the programming languages and it is still very much in demand. There are certain operations that can only be processed with C programming and that is what makes it relevant.

What are career opportunities in C programming?

There are plenty of jobs in C programming. C programmers can get a job as a developer, an analyst, software developers, a government sector employee, a trainer, or a teacher.

Which companies in India are hiring C programmers?

There are plenty of companies that are hiring C programming experts.
Here are the top companies hiring C developers:

– Accenture
– IBM
– Dell International
– ISRO
– TCS
– Infosys
– Tech Mahindra
– Wipro
– Capgemini
– Ericson
– Nvidia
– Bosch

These companies are hiring C developers and you can get jobs at a good package in these companies.

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Conclusion: Ready for the next C Programming Job Interview?

The C language is not limited to a few programs. It requires a constant learning approach and creativity to excel in the field. With C being one of the easiest languages, it is also one of the never going-out-of-demand jobs.

Technical knowledge is very necessary for C language as you can control the flow of the program to restore or retrieve the data. You can learn top-quality development jobs in C without any essential educational qualification.

Machine Learning and Artificial Intelligence will be in-demand jobs in the future and C developers will be needed for future technologies. Prepare for the interview with the best questions and answers and get your dream job in C development.