The key to success during any interviews is to tell the truth confidently. One of the common questions asked to candidates during HR interviews is 'Tell me something about your strong points or strengths?'
A smart answer revealing your strengths would be inform the interviewer that you can adapt well to situations, work with great spirit in teams, guide others on your areas on expertise, learn quickly and work on anything that is completely new to you, etc. Mostly interviewers want to see how you would react to various circumstances that you may encounter while working in any company. So, focus more on highlighting qualities like positive aptitude, quick learning, helping others in a team environment, patience, ability to stretch yourself when required, etc.
Once you have answered this query about your strengths, be prepared to be bombarded with a series of related queries that would test your patience, honesty and attitude. It's a common way interviewers try to judge the correctness of the answers given by candidates.
Thanks & Best Regards,