Actually did not get to the interview stage. After I downloaded, printed and mastered Rev website's voluminous text guidelines to caption and then sync one's created captions to a video (a process new to me; I had only done transcription from audio and video) using Rev's proprietary software, and mastered the Rev website instructions how to sync, which said that syncing was done from one's own pc-keyboard arrow keypad (the instructions did not warn that for the test, the only arrow that would sync would be an onscreen graphic control), I did the online test, which allows two to three hours to do and submit.
So in my online test, after I properly created content and formatted, e.g., properly linebreaked my list of short text captions per Rev rules, to my horror I found that none of my keyboard arrow keys worked to sync any of the captions. After minutes lost of floundering to find a way, I suddenly noticed midway downscreen to left of my captions list, an onscreen (not always visible) arrow that turned out to be the one control to operate the syncing step. So with it I synced my captions list (that appears onscreen centered below an upper video window).
Then I did a next sync-tweak phase: replayed the video, and as my captions appeared (as they would to future viewers of the video) in its bottom center, on an underlying onscreen slider scale I periodically as needed dragged the start of some captions that appeared onscreen too late or early, to the scale left or right, exactly to coincide their appearance onscreen with the start and end of spoken words as heard.
So then I was able to do and finish all the syncing, and submit my test within the time allowed. But given the nationwide competition for these jobs, likely the delay caused by test instructions that misrepresented the arrow-key control to perform the sync step was a factor in their downrating my test result.