You will get one chance to give the exam. This is done for a fair evaluation. You will have two hours to answer the questions and 10 mins extra to scan the pdf and upload it. You just need to upload the final pdf consisting of all the answers you have written and rename the pdf as your name and upload it in the box provided at the end of the question paper. There are a total of 8 questions and every question is a short answer type. After you finish the quiz, If you click on view questions on the result page, then you will get to see the solutions to all the problems. If you want to view them later then go to your account page and click on the statistics option for the respective quiz and you will be able to check the solutions.