How should you handle questions about past jobs and employers

Handling questions about past jobs and employers is quite easy.
The Interviewer might as a question like "What is your weakness?"
Most people answer the question by saying "I am weak at..." which is never your reply.
Your reply has to show your boss/employer that you need the job so an essential reply is "I have a weakness but I will strive to improve it."
Keep in mind that you should have extra copies of your resume to show that you care about your paper and it will give the impression that you are prepared.
Also, make sure you expatiate in full replies don't let them ask you to expand your answers.
But yet again don't speak too much.

Be yourself and be confident. Keep good hygiene. And dress appropriately for the job
P.s drink water before the interview begins that way your calm and not fussed.

Good Luck :)