Here is a guide to how I administer online quizzes. (I do not use so-called "proctoring" services; they are presently unnacceptably intrusive and should be used by no one.) Thus, unless I specify otherwise, the quiz will be "open-materials" and you are on your honor to not consult any live humans.
The time format may vary, but here is how they work; in the spirit of practicing what you preach (or eating your own dog-food, as they say in the IT biz,) I administer quizzes with a tool a wrote myself.
Very simply, when it is time, I will make the URL public to the class, which will mark the official "start" of the quiz. This page will take you to a standard HTML form full of multiple choice (radio button, if you're familiar with html) questions. You should do the following:
1) ENSURE that your fsuid (the one with your initials that's part of your email) is entered
2) Answer the questions.
Be sure to review your answers. Once you hit submit, you will be taken to a page that will show you your responses (in a bit of a weird format) Also, importantly, it will show you a private confirmation code at the bottom. This is how I will uniquely identify you and your submission in case of a problem (if I have only one submission from your ID, I can safely assume it is yours). If you are good with your answers, record your confirmation code. In fact, it's probably smartest to either save the page from your browser or take a screenshot.
If, upon review, you see a mistake - no worries! You can use the back button and change your response(s). Note that this will generate a NEW submission and a new confirmation code -- while I will see every submission, I, by default, will grade the LAST one you submit.
Finally, in addition to the URL, in Canvas, there will be a "Quiz Assignment." Simply "turn" in your final confirmation code (you may also copy and paste the whole page of answers if you wish) as a signal to me that you have completed the work.
Test quiz if you REALLY want to see what it's like: http://jrm4.com/testquiz/output.html