We recommend that you do not exit the full screen mode while taking a full screen mode test. This mode is enabled by the test setters to limit plagiarism.
If you want to navigate to another browser window or tab, you can press the ESC key or press ALT and TAB keys simultaneously to exit the full screen mode. However, every time you exit the full screen mode, HackerRank logs the event and record it in your report. The evaluator can view your Microsoft Excel report that states your out of window duration and number of window exits during the test.