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C++ Frequently Asked Questions

C++ Interview Questions and Answers

Programming

What are the differences between C and C++?

Posted on: September 21, 2024

C and C++ are two distinct programming languages, though C++ is considered an extension of C. C focuses on procedural programming, where programs are a sequence of instructions […]

Programming

Explain the concept of OOP (Object-Oriented Programming) and its principles

Posted on: September 21, 2024

Object-Oriented Programming (OOP) is a paradigm that focuses on organizing code into objects. These objects contain both data (attributes) and behaviors (methods). The four fundamental principles of OOP […]

Programming

What is a virtual function and a pure virtual function?

Posted on: September 21, 2024

A virtual function is a function in a base class that can be overridden in derived classes. The keyword “virtual” allows runtime polymorphism in C++. When a derived […]

Programming

How do you implement polymorphism in C++?

Posted on: September 21, 2024

Polymorphism in C++ allows objects of different types to be treated uniformly. It comes in two forms: compile-time (or static) polymorphism and runtime (or dynamic) polymorphism. Compile-time polymorphism […]

Programming

Explain the differences between stack and heap memory allocation

Posted on: September 21, 2024

Stack and heap are two types of memory allocations in C++. Stack memory is automatically managed and used for local variables, while heap memory is manually managed and […]

Programming

Explain the Differences Between `volatile`, `mutable`, and `const` Keywords in C++

Posted on: September 21, 2024

The `volatile`, `mutable`, and `const` keywords serve different purposes in C++. `volatile` prevents the compiler from optimizing a variable, as its value may change at any time. `mutable` […]

Programming

How Do You Implement a Lock-Free Data Structure in C++?

Posted on: September 21, 2024

Lock-free data structures allow concurrent access without using locks. They use atomic operations to ensure thread safety. Such structures, like lock-free stacks and queues, improve performance by avoiding […]

Programming

What Are the Implications of the ‘Rule of Five’ in C++11 and Later?

Posted on: September 21, 2024

The ‘Rule of Five’ in C++11 and later states that if a class defines one special member function, it should define all five. These functions are the destructor, […]

Programming

Explain the Advantages and Disadvantages of Using C++ Exceptions

Posted on: September 21, 2024

C++ exceptions provide a way to handle errors and exceptional conditions. Advantages include better error handling and separating error-handling code from regular code. Disadvantages include potential performance overhead […]

Programming

How Does RAII (Resource Acquisition Is Initialization) Manage Resource Lifetimes?

Posted on: September 21, 2024

RAII stands for Resource Acquisition Is Initialization. It manages resource lifetimes by tying resource management to object lifetime. Resources are acquired in the constructor and released in the […]

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  • What Is the Difference Between struct and union in C?
  • How Does the sizeof Operator Work in C?
  • What Is the Purpose of the Void Pointer in C?
  • malloc() vs calloc(): Key Differences in C Memory Allocation
  • Understanding the Different Types of Storage Classes in C
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