This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
Your question (especially the second sentence) is not clear.
If there is a question that you are not sure about, you can take note of it and research it later. If you can't find the answer using Google or the JavaRanch FAQs then you can post a question in this forum.