Please follow the below-given steps to add questions to the quiz contest
Step 1: Open dashboard go to Engagement click on Contest
Step 2: Click on the Quiz contest banner.
Step 3: A new window will open up, here click on Add question.
Step 4: Once you click on add Question then a new window will show up on the right side, create the questions and set the answer to the Quiz contest. If you want to add more options then click on 'Add Option'. Click on the 'Correct sign' in front of the correct option and then click on 'Add'. If more questions need to be added then click on 'Save and add more'.