What is the purpose of a namespace?

Question

I got a question in a challenge of C++:
(Both opponents at 4-4)

What is the purpose of a namespace?
//By some Ben
1) access a library
2) naming a file

But here, both answers are wrong as the use of a namepace is not this, and the std library is accessed using 'using'!

A namespace is for scoping particular data...
Eg: A's program and B's code...

So, I lost 32 xp thanks to this.

The question now is, how can SoloLearn approve this? Why reject my questions if you can approve incorrect ones?

Help me...

Answer 1

The question should be
What is the purpose of "using namespace ..."?
Then the answer will be 1. access a library.

Answer 2

They disapproved this:

https://www.sololearn.com/discuss/330835/?ref=app

Answer 3

I know, but tell me, are those answers correct?

Answer 4

@Cyrus Ornob Corraya
Yes, thats what it should be...

Answer 5

@Raletooane
Yes, thats what namespaces are for...
How can the creator of that quiz forget this?

Answer 6

Try again and again. There are lots of quizzes to be made. Just think, write and submit. Some might get approved. Have faith and patience.

Answer 7

Nope! None of those are correct. Report that question/quiz.

Answer 8

Namespaces provide a method for preventing name conflicts in large projects.

Symbols declared inside a namespace block are placed in a named scope that prevents them from being mistaken for identically-named symbols in other scopes.

Multiple namespace blocks with the same name are allowed. All declarations within those blocks are declared in the named scope.
//cppreference.com