Mongoose quiz

Test your Mongoose knowledge with a free interactive quiz — 24 questions with answers and explanations. No signup needed to play.

How do you create and save a new document?

1. How do you create and save a new document?
2. What does `populate()` do?
3. What does `mongoose.Schema.Types.ObjectId` (referenced via `ref`) represent?
4. What does specifying `timestamps: true` in schema options do?
5. What is a Mongoose "model"?
6. How do you define a default value for a schema field?
7. What does schema-level validation (e.g. `required: true`) do?
8. What is the purpose of a compound/multi-field index in Mongoose (`schema.index({ ... })`)?
9. How do you update a document?
10. What does `lean()` do on a Mongoose query?
11. How do you connect Mongoose to a MongoDB database?
12. What is a Mongoose "virtual"?

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