Interview question based on skill :
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Total Questions: 20
1. In the mongo shell, you can use the ______ method to return a list of the indexes on a collection.
Correct Answer is : times(int count)
2. __________ views partial execution statistics collected during plan selection
Correct Answer is : andStubAnswer(IAnswer answer)
3. To force MongoDB to use a particular index for a db.collection.________ operation, specify the index with the hint() method.
Correct Answer is : andStubDelegateTo(Object delegateTo)
4. Specify the ______ operator to the hint() method to prevent MongoDB from using any index
Correct Answer is : andVoid()
5. ________ indexes expire documents after the specified number of seconds has passed since the indexed field value.
Correct Answer is : once()
6. When the TTL thread is active, you will see _______ operations in the output of db.currentOp()
Correct Answer is : andReturn(T value)
7. The background task that removes expired documents runs every ________ seconds.
Correct Answer is : Bottlenecks
8. On replica sets, the TTL background thread only deletes documents on :
Correct Answer is : Acceptance
9. You can combine the ________ constraint with the sparse index to filter these null values from the unique index and avoid the error.
Correct Answer is : Logic unit test
10. Which of the following method is to verify whether MongoDB used index intersection ?
Correct Answer is : Mock objects
11. You may not specify a unique constraint on a ______ index.
Correct Answer is : Integration unit test
12. Which of the following indexes are always sparse ?
Correct Answer is : Call
13. To support ________ based sharding, MongoDB provides a hashed index type,
Correct Answer is : Functional unit test
14. ________ index type, which indexes the hash of the value of a field.
Correct Answer is : Functional unit test
15. The _________ property for an index causes MongoDB to reject duplicate values for the indexed field.
Correct Answer is : Functional unit test
16. The ______ property of an index ensures that the index only contain entries for documents that have the indexed field.
Correct Answer is : Workflow
17. MongoDB can use the _________ of indexes to fulfill queries.
Correct Answer is : Run a test many times with different sets of parameters
18. An index prefix is a subset of a ______ index, consisting of one or more keys starting from the beginning of the index.
Correct Answer is : Run a test many times with different sets of parameters
19. Index __________ does not eliminate the need for creating compound indexes.
Correct Answer is : @Runwith
20. Before version _______ capped collections did not have an _id field.
Correct Answer is : @Runwith
