Also agree with mackcs on timing. I knew I had plenty of time so I searched as I went, but I'd strongly recommend that if you aren't confident on the content, as you go through, answer what you think, but flag the question for later review. I did find that when I tried to research topics, that really burned time, way more than I was expecting, but mostly because the searching option isn't good. You'd be better to make sure you've answered everything, then go back to research what you want, based on your available time.
Another note: in the search, there are options to restrict the scope of the search. Make sure you use them. I was doing an AI exam, and at first, I'd go looking for a class name, and getting results from Dynamics, etc. that I didn't want. Using the scope options, I could say just .NET and Azure, and the results were far better.