MongoDB interview questions part 7
MongoDB interview questions part 7
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Total Questions: 20
1. MongoDB can be used as a ____________, taking advantage of load balancing and data replication features over multiple machines for storing files.
Correct Answer is : AMS
2. MongoDB can be used as a ____________, taking advantage of load balancing and data replication features over multiple machines for storing files.
Correct Answer is : AMS
3. _____________ can be used for batch processing of data and aggregation operations.
Correct Answer is : MapReduce
4. _____________ can be used for batch processing of data and aggregation operations.
Correct Answer is : MapReduce
5. MongoDB supports fixed-size collections called ____________ collections.
Correct Answer is : capped
6. MongoDB supports fixed-size collections called ____________ collections.
Correct Answer is : capped
7. MongoDB uses a ____________ lock that allows concurrent read access to a database but exclusive write access to a single write operation.
Correct Answer is : readers-writer
8. MongoDB uses a ____________ lock that allows concurrent read access to a database but exclusive write access to a single write operation.
Correct Answer is : readers-writer
9. Which of the following sorting is not supported by MongoDB ?
Correct Answer is : collation
10. Which of the following sorting is not supported by MongoDB ?
Correct Answer is : collation
11. _________ is a binary serialization format used to store documents and make remote procedure calls in MongoDB.
Correct Answer is : BSON
12. Point out the correct statement :
Correct Answer is : ObjectIds are small, likely unique, fast to generate, and ordered
13. Which of the following data type is depreciated ?
Correct Answer is : Undefined
14. Each data type has a corresponding number that can be used with the _______ operator to query documents by BSON type.
Correct Answer is : $type
15. Point out the wrong statement :
Correct Answer is : BSON Date is a 32-bit integer that represents the number of milliseconds
16. MongoDB represents queries as ___________ objects.
Correct Answer is : BSON
17. There is _________ byte counter in BSON, starting with a random value
Correct Answer is : 3
18. In the mongo shell, you can access the creation time of the ObjectId, using the ______ method..
Correct Answer is : getTimestamp()
19. __________ returns the JavaScript representation in the form of a string literal
Correct Answer is : toString()
20. Which of the following query is used to generate a new ObjectId, use the ObjectId() constructor with no argument
Correct Answer is : x = ObjectId()
