MongoDB interview questions part 10
MongoDB interview questions part 10
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Total Questions: 20
1. A query may include a ___________ that specifies the fields from the matching documents to return.
Correct Answer is : projection
2. Point out the correct statement :
Correct Answer is : MongoDB has full support for secondary indexes
3. MongoDB stores all documents in :
Correct Answer is : collections
4. In MongoDB, _________ operations modify the data of a single collection.
Correct Answer is : CRUD
5. Point out the wrong statement :
Correct Answer is : Indexes cannot enforce uniqueness in collection
6. Which of the following operation adds a new document to the users collection ?
Correct Answer is : insert
7. Which of the following preference determines how the client direct read operations to the set ?
Correct Answer is : read
8. Applications can also control the behavior of write operations using _______ concern.
Correct Answer is : write
9. MongoDB process collection of documents using _________ operations.
Correct Answer is : Map-reduce
10. Which of the following pipeline is used for aggregation in MongoDB ?
Correct Answer is : data processing
11. Which of the following collection do not support the TTL property ?
Correct Answer is : Compound indexes
12. Point out the correct statement :
Correct Answer is : All of the mentioned
13. If the indexed field in a document is not a _____ or an array that holds a date value(s), the document will not expire.
Correct Answer is : DATE
14. When the TTL thread is active, you will see _______ operations in the output of db.currentOp().
Correct Answer is : delete
15. Point out the correct statement :
Correct Answer is : TTL indexes expire documents after the specified number of seconds has passed since the indexed field value
16. Secondary members replicate _________ operations from the primary.
Correct Answer is : None of the mentioned
17. A collection with a TTL index has __________ enabled.
Correct Answer is : usePowerOf2Sizes
18. Which field does not support TTL indexes ?
Correct Answer is : _id
19. You cannot use _________ to change the value of expireAfterSeconds of an existing index.
Correct Answer is : createIndex()
20. You cannot create a TTL index on a ________ collection
Correct Answer is : Capped
