Adding my two cents here: only selecting an alternative on the last question is no longer enough; it
will not be recorded as an answer!
You need to click "Next"!I took the GMAT a few weeks ago and had many issues that day, both directly and indirectly related to the test, unfortunately. One of the issues was time management. I didn't have enough time to finish Verbal and DI sections properly. And in both, I left the last question with my answer only selected on the choice I thought was correct. I let time run out that way. What a mistake...
When the official results arrived, I realized that GMAT considered them as
unaswered!
That explained a lot about why my final score dropped down to the mere 50th percentile.
But I learned a lesson that day ->
Yes, you have to submit your last answer by clicking on "Next" button, otherwise it won't be considered valid.A mistake I'll never allow to happen again.