CareerCup

I sincerely suggest the poster of this question to do a brief google before posting such questions.
This is pretty standard interview question.

This is a very simple question . If you want answer to this question , there are tons of places you would find solution for this. If you want to share the question for the purpose of letting everyone know it was asked in your interview, you can share which company etc.
Anyways : a brief algo insight,
you scan string from left to right, and encountering any opening bracket, you push this char into a stack. If you see any closing bracket, you pop top element and it should match the opening bracket. If it doesn't, your string is not matched otherwise continue.

In the end, if stack is empty all brackets has been matched else, your string is not matched.

Thank you for your comments. My intention was to let everyone know about the question. I didn't add the company details and thanks for pointing that out.