C++ Interview: 200 Questions and Answers

The book "C++ Interview: 200 Questions and Answers" is a practical guide for those preparing for a technical interview for a C++ developer position (Junior, Middle, or Senior). The author has collected and structured the most common questions asked at major IT companies and provides detailed, correct, and clear answers to them.

What this book is about

The book covers all key topics of the C++ language that are tested in interviews:

• Language Basics — data types, references, pointers, constness, specifiers and modifiers;
• Object-Oriented Programming (OOP) — encapsulation, inheritance, polymorphism, abstract classes, virtual functions;
• Memory Management — new/delete, smart pointers (unique_ptr, shared_ptr, weak_ptr), RAII, working with heap and stack;
• Standard Template Library (STL) — containers (vector, list, map, unordered_map), iterators, algorithms, functors;
• Templates — generic programming, specialization, variadic templates, type traits;
• Multithreading and Synchronization — threads, mutexes, condition_variable, atomic operations, deadlock and race conditions;
• Modern C++ (C++11/14/17/20) — move semantics, lambda expressions, auto, decltype, constexpr, structured bindings;
• Common Errors and Pitfalls — dangling pointers, memory leaks, copy issues, undefined behavior.

Who this book is for

• Beginner developers who want to systematize their knowledge before their first interview;
• Experienced programmers looking to refresh complex topics and learn new nuances;
• Those transitioning from another language to C++ and wanting to quickly master key concepts;
• Technical students studying C++ at university.

What the reader will learn

• How to correctly answer questions about virtual functions, vtable tables, and abstract classes;
• The difference between stack and heap, and how to avoid memory leaks;
• How to effectively use the STL: container selection, operation complexity, iterators;
• How move semantics work and why they speed up code;
• How to write thread-safe code and avoid data races;
• What questions are asked in interviews at FAANG and Russian IT companies.

Each question is accompanied not only by the correct answer but also by an explanation of why that answer is correct, as well as code examples. The book is written in a lively, accessible language, without excessive academic formality. It is not a language reference, but rather a training simulator for interview preparation — you can test yourself, review complex topics, and feel confident before a real interview.