What are some advanced C++ interview questions I should prepare for?

What are some advanced C++ interview questions I should prepare for?

Here are a few advanced C++ interview questions you might encounter:

1. Explain the concept of RAII.
2. What are move semantics and how do they improve performance?
3. Can you describe the differences between deep copy and shallow copy?

Can you explain RAII and give an example?

RAII stands for Resource Acquisition Is Initialization. It ensures that resources are properly released when an object goes out of scope. For example, using a smart pointer like std::unique_ptr automatically deallocates memory when the pointer is destroyed.

What are move semantics?

Move semantics allow the resources of one object to be 'moved' to another object, rather than copied. This is done using rvalue references and can significantly improve performance by avoiding unnecessary deep copies.

Can you give an example of a situation where move semantics would be beneficial?

Sure! Consider a function that returns a large object. Instead of copying the object, which can be expensive, move semantics allow the function to transfer ownership of the object to the caller, reducing overhead.