Which C++ standard library smart pointer provides exclusive ownership of a dynamically allocated object?
Option B is correct. std::unique_ptr uniquely owns and manages another object through a pointer and disposes of that object when the unique_ptr goes out of scope.
What happens if a base class destructor is NOT declared as virtual in C++ when deleting a derived object through a base pointer?
Option C is correct. Deleting a derived object via a base pointer with a non-virtual base destructor results in undefined behavior (only base cleanup runs).
Which header file in C standard library provides functions for string manipulation like strcpy() and strlen()?
Option B is correct. <string.h> defines string-handling functions such as strlen(), strcpy(), strcat(), and strcmp().
In C++, what is an Inline Function?
Option C is correct. Inline functions request the compiler to substitute the function body directly at the call site, eliminating stack push/pop overhead.
Which cast operator in C++ is specifically designed for safe runtime downcasting along class hierarchies using dynamic type information?
Option D is correct. Both Option A and related standard techniques apply here. dynamic_cast performs runtime type checks using RTTI; if a downcast pointer is invalid, it returns nullptr.