Tip 1 : Hold good problem-solving skills and knowledge of the core subjects mentioned above.
Tip 2 : Stay calm during the interview
Tip 3 : Solve 2-3 coding problems consistently on any platform
Tip 1 : Have some projects on resume.
Tip 2 : Do not put false things on resume.

The value of the sum can be very large, return the answer as modulus 10^9+7.
Step 1 : Fist give a simple brute-force approach
Step 2 : And then optimize it by applying the prefix sum
Tip 1 : Practice some SQL Queries to get a better understanding

Here's your problem of the day
Solving this problem will increase your chance to get selected in this company
What is recursion?