Tip 1 : Regarding DSA preparation, I have a theory. 20 percent of the questions will be asked in 80 percent of the interview and 80 percent of the questions will be asked in 20 percent of the interviews. In short, some questions have a very high chance of coming up during the interviews and some have very low chance. We should focus more on the questions that have more chance of coming up in the interview. You can find these questions on Striver SDE Sheet, InterviewBit, Leetcode 100 most liked, Leetcode 100 most important.
Tip 2 : Try to find patterns in the questions. Group them according to a pattern for better understanding. Make notes in Excel, word or hand written and revise them.
Tip 3 : Try to solve the questions that have more chance of coming up in the interview with many different approaches.