MongoDB MCQ Questions and Answers (Beginner to Advanced)
Test your MongoDB knowledge with these multiple choice questions (MCQs).
This quiz is designed to help you revise:
- CRUD operations
- Query operators
- Aggregation
- Schema design
- Indexing
Each question includes the correct answer and explanation.
🟢 Beginner Level
Q1. Which command is used to create a database in MongoDB?
A) create db
B) use db
C) make database
D) new db
Answer: B) use db
Explanation: MongoDB creates a database when you use it and insert data.
Q2. Which method is used to insert multiple documents?
A) insertOne()
B) insertAll()
C) insertMany()
D) addMany()
Answer: C) insertMany()
Q3. Which operator is used for “greater than”?
A) $lt
B) $gt
C) $eq
D) $ne
Answer: B) $gt
🟡 Intermediate Level
Q4. What does $in operator do?
A) Matches exact value
B) Matches multiple values
C) Matches range
D) Matches null
Answer: B) Matches multiple values
Q5. Which method is used to update multiple documents?
A) updateOne()
B) updateAll()
C) updateMany()
D) modify()
Answer: C) updateMany()
Q6. What does limit() do?
A) Filters data
B) Sorts data
C) Limits number of documents
D) Groups data
Answer: C) Limits number of documents
🔵 Advanced Level
Q7. Which stage is used in aggregation to group data?
A) $match
B) $group
C) $sort
D) $limit
Answer: B) $group
Q8. What is the purpose of an index?
A) Store data
B) Improve performance
C) Delete data
D) Backup data
Answer: B) Improve performance
Q9. Which function shows query execution details?
A) analyze()
B) debug()
C) explain()
D) stats()
Answer: C) explain()
🔴 Expert Level
Q10. When should you use embedding?
A) When data grows large
B) When data is unrelated
C) When data is small and related
D) Always
Answer: C) When data is small and related
Q11. What happens if a document exceeds size limit?
A) MongoDB compresses it
B) MongoDB deletes it
C) It throws an error
D) It splits automatically
Answer: C) It throws an error
Q12. Which is better for large datasets?
A) Embedding
B) Referencing
C) Both same
D) None
Answer: B) Referencing
🏆 Final Score
Count your correct answers:
- 10–12 → Excellent 🎯
- 7–9 → Good 👍
- 4–6 → Keep practicing 📘
- 0–3 → Revise basics 🔁
🚀 What's Next?
Want more practice?
- Try MongoDB Practice Series (Parts 1–8)
- Build your own mini project
- Practice real-world queries
💬 Comment your score below!