John Deere Lead Engineer Interview Questions and Answers

A smart pointer is a class that wraps a raw pointer, providing additional functionality and safety.

• Smart pointers automatically manage the lifetime of the object they point to.

• They prevent memory leaks by ensuring that the object is deleted when it is no longer needed.

• They can be used to implement reference counting, garbage collection, and other memory management techniques.

• Examples of smart pointers include unique_pt

Extern is a keyword used in C and C++ programming languages to declare a variable or function that is defined in another source file.

• Extern is used to declare a variable or function that is defined in another source file.

• It is used to provide a reference to a variable or function that is defined in another file.

• For example, if we have a variable declared in file1.c and we want to use it in file2.c, we can declare it as...read more

Virtual function is a function in base class that is overridden in derived class.

• Virtual function allows polymorphism in C++

• It is declared in base class with virtual keyword

• It is overridden in derived class with same signature

• It is called based on the object type at runtime