No, it is not possible to download any test without the internet connectivity. But you can attempt a test without internet connectivity after downloading it on your device.
You can change the response of any question by clicking on the 'Clear' option or simply selecting a new response for the question. Do not forget to click 'Save' again after changing the response and you're done!
How can I go back to the question attempt screen(Left panel where question attempt status is shown)?
Green: Question attempted
Red: Question skipped or not attempted
Purple: Question not attempted and marked to review for later
Purple with a Tick: Question attempted but marked to review later
Grey: Question to be viewed
What happens to the questions that have been attempted and marked for review, if the test is auto-submitted or I don't get time to revisit them?
Also note that under no circumstances, the test window must be closed before submission else all the progress attained in the test would be lost. In addition, navigating away from the National Test Abhyas app or test window for more than 60 seconds submits the test automatically.
However, in case your device stops due to any reason other than battery draining in the middle of the test, you need to restart it and navigate to the start test screen on the National Test Abhyas app and click “Resume test” and continue from where you left off.