Some logos are easily identifiable but few of them are very rarely seen and not easy to recognise. In that case you are given an option of using hints. If you are still not able to find out the answer, you can ask to your friend using inbuilt face book and twitter chat.
As you move up in levels, it becomes harder and complicated. So if you stuck at any point, don't be panic. Few logo quiz answers level 2 are as follow: