CPP Exception Handling & Error Management 3

Question 1

What is the purpose of std::nothrow when used with the new operator?

Accepted Answer

It makes new return nullptr instead of throwing std::bad_alloc on failure

Answer

new(std::nothrow) returns nullptr rather than throwing std::bad_alloc when memory allocation fails.

Question 2

Which standard exception type should be thrown when a function argument is outside the valid range?

Accepted Answer

std::invalid_argument

Answer

std::invalid_argument is thrown when a function receives an argument with an invalid value regardless of domain constraints.

Question 3

What does std::terminate() do by default when called?

Accepted Answer

Calls std::abort()

Answer

By default, std::terminate() calls std::abort(), which immediately ends the program without stack unwinding.

Question 4

What happens if no catch handler matches a thrown exception?

Accepted Answer

std::terminate() is called directly

Answer

If no matching handler is found after searching all active try blocks, std::terminate() is called directly in C++11 and later.

Question 5

Which of these exception types inherits from std::logic_error?

Accepted Answer

std::length_error

Answer

std::length_error derives from std::logic_error, as do std::invalid_argument, std::domain_error, and std::out_of_range.

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