What happens if you access an array index outside its size in C++?

Q What happens if you access an array index outside its size in C++?

Question ID

#24495

Subchapter

Array in C++

Action

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Correct Answer: D

In C++, accessing an array index outside its declared size does not automatically give a compiler error or a guaranteed runtime error.

Instead, it results in undefined behavior.

This means:

C++ does not perform bounds checking on arrays.

Correct Answer: D) Undefined behavior

Description:
Accessing an array index beyond its size leads to unpredictable results, which is called undefined behavior in C++.