MongoDB Interview Questions for Freshers
Preparing for your first MongoDB interviews? This set is curated for freshers and early-career developers (0–2 years): the 27 questions that come up most for entry-level roles, each with a clear answer, example code and follow-ups.
27 MongoDB questions
- 1How does MongoDB handle transactions?Intermediate
- 2What is a Partial Index?Intermediate
- 3Explain Write Concern in MongoDB.Intermediate
- 4What is an 'Upsert' operation?Intermediate
- 5How do you perform text searches in MongoDB?Intermediate
- 6Explain the concept of Capped Collections.Intermediate
- 7What is the difference between $push and $addToSet?Intermediate
- 8What are TTL Indexes?Intermediate
- 9How does the $lookup operator work?Intermediate
- 10Explain the Aggregation Framework.Intermediate
- 11What is an Index in MongoDB?Beginner
- 12How do you update a document in MongoDB?Beginner
- 13What is the difference between an embedded document and a reference?Beginner
- 14How does MongoDB handle schema-less data?Beginner
- 15What are the primary data types in MongoDB?Beginner
- 16How do you perform a basic find query?Beginner
- 17What is the purpose of the _id field?Beginner
- 18Explain the concept of Collections.Beginner
- 19What is a Document in MongoDB?Beginner
- 20What is MongoDB?Beginner
- 21MongoDB Interview Question 2 (Free)Intermediate
- 22MongoDB Interview Question 5 (Free)Intermediate
- 23MongoDB Interview Question 4 (Free)Beginner
- 24MongoDB Interview Question 1 (Free)Beginner
- 25MongoDB Advanced Interview Question 10Beginner
- 26MongoDB Advanced Interview Question 8Intermediate
- 27MongoDB Advanced Interview Question 7Beginner
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Frequently asked questions
Which MongoDB questions do freshers (0–2 years) get asked?
This page collects 27 MongoDB interview questions aligned with freshers (0–2 years), ranging across the difficulty levels that match that experience band.
How do I prepare for a MongoDB interview with my experience level?
Work through these questions in order, make sure you can explain each answer out loud, and pay attention to the real-world examples and follow-ups — interviewers at this level care as much about reasoning as the final answer.
Do the answers include code and examples?
Yes — answers include explanations, code examples where relevant, common mistakes to avoid and follow-up questions so you are ready for the full interview conversation.