C++ Interview Questions Your Guide to Success
C++ is a powerful language for system/software development. Jobpe’s C++ interview questions cover memory management, OOP, templates, and advanced programming concepts.
c++
- Programming
What are the main differences between C++ and C?
C++ supports object-oriented programming, classes, and exception handling, while C is procedural only.
Explain the concept of pointers in C++.
Pointers store memory addresses and allow direct manipulation of memory locations.
What is polymorphism and how is it achieved in C++?
Polymorphism allows objects to be treated as instances of their parent class using virtual functions.
Describe the difference between stack and heap memory in C++.
Stack is used for static memory allocation; heap is for dynamic memory allocation using new/delete.
What are templates in C++?
Templates enable generic programming by allowing functions and classes to operate with any data type.
Explain the RAII (Resource Acquisition Is Initialization) idiom.
RAII ensures resource management (like memory or files) is tied to object lifetime for safe cleanup.
How does C++ handle exception handling?
C++ uses try, catch, and throw keywords to handle exceptions and maintain program flow.
What is the difference between overloading and overriding?
Overloading is defining multiple functions with the same name but different parameters; overriding redefines a base...
What are smart pointers and why are they useful?
Smart pointers automate memory management and help avoid memory leaks by managing object lifetimes.
Describe the use of namespaces in C++.
Namespaces organize code and prevent name collisions by grouping identifiers under a name.
Programming
What are the main differences between C++ and C?
C++ supports object-oriented programming, classes, and exception handling, while C is procedural only.
Explain the concept of pointers in C++.
Pointers store memory addresses and allow direct manipulation of memory locations.
What is polymorphism and how is it achieved in C++?
Polymorphism allows objects to be treated as instances of their parent class using virtual functions.
Describe the difference between stack and heap memory in C++.
Stack is used for static memory allocation; heap is for dynamic memory allocation using new/delete.
What are templates in C++?
Templates enable generic programming by allowing functions and classes to operate with any data type.
Explain the RAII (Resource Acquisition Is Initialization) idiom.
RAII ensures resource management (like memory or files) is tied to object lifetime for safe cleanup.
How does C++ handle exception handling?
C++ uses try, catch, and throw keywords to handle exceptions and maintain program flow.
What is the difference between overloading and overriding?
Overloading is defining multiple functions with the same name but different parameters; overriding redefines a base class method in a derived class.
What are smart pointers and why are they useful?
Smart pointers automate memory management and help avoid memory leaks by managing object lifetimes.
Describe the use of namespaces in C++.
Namespaces organize code and prevent name collisions by grouping identifiers under a name.
