What are your strengths?

Purpose - The question is asked by the interviewer to understand your key selling point and get to know if it is relevant and helpful to handle the responsibilities that the person will handle if hired.

Note - All Most all Interviewers/Hiring people in management who assign tasks and responsibilities feel that a person is productive in work if his strength matches to the responsibilities of the role. So expect this question in most interviews. Also, be aware Strengths give clues on your interest.

Approach - Pick 2 or 3 strengths and give examples for each 1 to demonstrate how you used it in the previous job or in life. You can identify Some of your strengths from below list.
Continuous learning
Problem solving
Multi-tasking
Self learning
Flexible
Team Player
Hard working
Like Challenges
Quick Learner
Self Motivated
Communication, Oral and Written
Process Oriented
Analytical

Pre-work -Understand the job requirement in detail and get to know in advance what are the responsibilities the role you are applying and accordingly pick your strength that is relevant to the role. It would be advantageous to know the problems are issues the company is facing and what was the reason for the opening. You should be prepared for this question. It is one of the most commonly asked interview question.

E.g.: Communication and presentation - Communication and presentation is my strength.
In my previous job, I was given additional responsibilities to present and facilitate project status meetings with executive management and team building activities across departments.

How do you handle stress?

Wrong approach -
Do not say you are never under stress or I hate stress or you do exercise and meditation to take care of stress. Focus strictly on professional things that you do.

Right approach -
A good response is to say that pressure helps you focus and maintain your drive and like to handle challenges. Explain that some of your best efforts are the result of stress and pressure. Also inform that when pressure gets too intense, you know how to handle it.

Example -
Stress and pressure are a challenging part of the job and i know how to handle it. I handle it by focusing on proper planning and reporting, better time management, open communication, Hard work and prioritization.