Top CPP Interview Questions and Answers for Freshers and Experienced
Updated: 26 June 2025, 3:25 pm IST
Are you eyeing a future in C++ development and wondering if it’s worth your time? Here’s a reality check: C++ developers in India are earning an average of ₹6 lakh per year, with top professionals making up to ₹50 lakh annually. With India’s booming tech sector and the rise of high-performance computing, companies are on the hunt for talent like never before.
But here’s a question for you: Are you prepared to answer the interview questions that could land you a spot in this lucrative field? If you’re unsure, then read on to crack any job interview in the relevant field with these common CPP interview questions and answers.
Freshers Level C and CPP Interview Questions
These are some basic-level CPP interview questions that you can face to showcase your basic knowledge and skills on a particular topic.
What is C++, and why is it important?
Importance: The interview asks this question to analyse your basic understanding of C++.
Answer: C++ is a general-purpose and compiled programming language that allows coders to use generic and object-oriented programming features. C++ helps create complex systems where hardware manipulation is required. In India, over 1.2 million software professionals use C++ in their daily work, making it one of the top five most-used languages in the country.
What exactly do you mean by an ASCII table?
Importance: Asking this question is vital to gauge your knowledge of the key tools of C++.
Answer: The American Standard Code for Information Interchange (ASCII) table is an approved character encoding method that specifies the connection between characters and numerical values ranging from 0 to 127.
ASCII remains foundational in Indian government and banking systems, where legacy systems still process thousands of transactions daily using ASCII-based protocols.
What is inheritance?
Importance: This question is essential to analyse your knowledge of foundational concepts of C++.
Answer: Inheritance is developing new classes from existing classes, which are known as derived classes. The derived classes inherit all of the base class’s capabilities, including new features, and make their own modifications.
What do you mean by a linker in C++?
Importance: This question is crucial for evaluating your knowledge of basic C++ concepts.
Answer: Linker is a software that helps to combine multiple object files produced by the compiler into a single executable library. It also resolves references between object files and different modules.
What is a function in C++?
Importance: The interviewer asks this question to analyse your skills in maintaining the readability of code.
Answer: A function is a named chunk of code that completes a defined task. Functions are reusable and modular to break down complex tasks into smaller parts. A function also allows coders to improve the readability and maintainability of code.
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Intermediate Level C CPP Interview Questions
Now, look at some of the common intermediate-level CPP interview questions. These questions help analyse one’s ability to handle complexity in a particular domain.
What is a constructor?
Importance: The interview asks this question to test candidates’ knowledge of basic OOP concepts.
Answer: The constructor is a member function called automatically when an object is formed. Constructors are named after the class of which they are members, so the compiler recognises that the member function is a constructor.
What are loops in C++?
Importance: Answering this question is vital to showcase your knowledge of foundational C++ concepts.
Answer: In C++, loops are control structures that allow a block of code to be executed repeatedly while meeting a specific condition. They allow for the automation of repetitive processes and iteration over data gathering.
Also Read:- Ignite Blockchain: A Comprehensive Guide
What is STL?
Importance: The interviewer asks this question to test your knowledge of software development.
Answer: Standard Template Library (STL) is a container template collection that includes generic classes and functions. STL components include containers, algorithms, iterators, and function objects.
Explain try-throw-catch blocks
Importance: This question often analyses your problem-solving skills on programming failure in C++.
Answer: Try-throw-catch blocks are C++ constructs used to handle exceptions. They enable developers to properly manage runtime failures by separating error detection from error handling.
What is a lambda and an anonymous function in C++?
Importance: Answering this question is important to showcase your modern C++ knowledge.
Answer: A lambda expression or an anonymous function is a simple way to define an inline function that may be used for brief pieces of code.
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Experienced Level C Plus Plus Interview Questions
These are some expert-level CPP interview questions that analyse your problem-solving skills in C++.
What do you mean by lvalue and rvalue?
Importance: This question is crucial for analysing a candidate’s knowledge of fundamental C++ concepts.
Answer: An lvalue is an expression that represents an item that has a name and occupies a specific memory address. An rvalue, on the other hand, is an expression that represents a value rather than a memory location.
What do you mean by Return Value Optimisation?
Importance: Answering this question is crucial to gauge your knowledge of code translation.
Answer: Return Value Optimisation or RVO is a C++ compiler optimisation method that prevents unnecessary object duplication when returning them from a function. Instead of making a temporary duplicate of the object and returning it, the compiler creates it immediately in the memory address of the caller’s target object.
What is template specialisation?
Importance: This question is important to test your generic programming skills.
Answer: Template specialisation helps you to create specialised implementations of templates for certain kinds or groupings of types.
What do you mean by SFINAE?
Importance: This question is significant in checking candidates' in-depth knowledge of C++ programming.
Answer: SFINAE, or Substitution Failure Is Not An Error, is a C++ template metaprogramming theory. It states that if a replacement fails during template instantiation, it is not deemed a compilation mistake.
What is metaprogramming?
Importance: The interviewer asks this question to evaluate your approach to software development.
Answer: Metaprogramming is a programming approach in which one programme writes or manipulates another programme as its data. It entails developing code that produces code dynamically during compilation or runtime.
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Final Word
Besides preparing CPP interview questions and answers, you should enroll in a relevant course. Visit Amity Online's website and enrol in our Bachelor of Computer Applications course to understand software development fundamentals.
This 3-year certification course prepares you to work on real-world projects and earn your degree online.
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