You can all of your questions in the question store or you can also import a .JSON file having the questions.
Add a New Question
Click on New Question button to add a new question.
Add the details in the question setup form. You can preview the question that you write in the setup form.
Click on Submit button at the bottom to save the question
Click on Import button to add the import file having questions.
Once you click on the import button, you will see an option to either browse or drag your files. Allowed file type is .JSON only. Upload the file and click on Ok button.