Question 61 : Before version _______ capped collections did not have an _id field.
1. 2.1
2. 2.4
3. 3.0
4. 2.2
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Question 62 : Index __________ does not eliminate the need for creating compound indexes.
1. union
2. addition
3. intersection
4. all of the mentioned
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Question 63 : An index prefix is a subset of a ______ index, consisting of one or more keys starting from the beginning of the index.
1. Hashed
2. Unique
3. Sparse
4. Compound
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Question 64 : Which of the following method is to verify whether MongoDB used index intersection ?
1. explain()
2. analyze()
3. intersect()
4. none of the mentioned
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Question 65 : MongoDB can use the _________ of indexes to fulfill queries.
1. union
2. intersection
3. projection
4. none of the mentioned
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Question 66 : The ______ property of an index ensures that the index only contain entries for documents that have the indexed field.
1. Hashed
2. Unique
3. Sparse
4. None of the mentioned
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Question 67 : Point out the wrong statement :
1. TTL index is ideal for certain types of information like machine generated event data, logs, and session information that only need to persist in a database for a finite amount of time
2. You cannot combine the sparse index option with the unique index option
3. TTL indexes are special indexes that MongoDB can use to automatically remove documents from a collection after a certain amount of time
4. None of the mentioned
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Question 68 : The _________ property for an index causes MongoDB to reject duplicate values for the indexed field.
1. Hashed
2. Unique
3. Multikey
4. None of the mentioned
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Question 69 : ________ index type, which indexes the hash of the value of a field.
1. Hashed
2. Unique
3. Multikey
4. None of the mentioned
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Question 70 : To support ________ based sharding, MongoDB provides a hashed index type,
1. primary
2. root
3. hash
4. all of the mentioned
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