How to write a dynamic quiz using JavaScript, Can not use Jquery in any sort. Use an array to store the questions.

1. The questions types must be textbox input, radio button input, and dropdown list. Consist of different form controls. 6 questions will work, 2 for each question type.

2. When the HTML renders the page, display one question at a time, when the user picks an option or input an answer, then proceed to the next question with a Next button. Validation for input is necessary.

3. When users finish all the questions, allowing the user to click the submit button to check for their scores. And more importantly, show a answer key along with the score when displaying the result to the user.