Not very hard; two coding questions, easy to medium level, along with other skills like SQL, development, etc.
The first round is a coding round, not very difficult, with two coding questions.
Merge Intervals problem from LeetCode
Second largest salary in SQL
The following metrics were computed from 1 interview experience for the MongoDB SDE-intern role in India.
MongoDB's interview process for their SDE-intern roles in India is incredibly easy as the vast majority of engineers get an offer after going through it.
Candidates reported having very good feelings for MongoDB's SDE-intern interview process in India.