Hi jujhar330,
this is not something that HD Quiz does because in order to do something like this, we’d need to save the current state of the quiz (what answer was selected for every question) every single time an answer is selected for each user – AND reload the quiz in that exact same state on quiz load.
I doubt that this is something I will ever consider adding to HD Quiz directly, due to the complexity of getting a feature like this working across all features.
If this is something you really need, you could always add your own implementation to your site using the hdq_after hook and save answers to local storage. But at the end of the day, something like this would be a ton of work, and would incompatible with many features of HD Quiz such as randomized questions/answer order, timer, pagination, etc.
If this is a path you are adamant about going down, and you don’t need certain quiz features like above – let me know and I can at least mockup the basic code you’d need to get started. This way if you can code yourself you’ll have a good base to work with, or you can send that code to your developer so that they can modify and implement it as needed.