Question 41 : The $rename operator logically performs an _______ of both the old name and the new name.
1. $unset
2. $set
3. $Nested
4. None of the mentioned
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Question 42 : Updates that include _________ of field names may result in the reordering of fields in the document.
1. Renaming
2. Joining
3. Nesting
4. None of the mentioned
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Question 43 : User-defined indexes on multiple fields is called :
1. composite index
2. secondary index
3. compound index
4. none of the mentioned
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Question 44 : An application communicates with MongoDB by way of a client library, called :
1. Driver
2. Parent
3. Rank
4. None of the mentioned
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Question 45 : Which of the the following data structures are documents in MongoDB ?
1. All database records
2. Query selectors
3. Update definitions
4. All of the mentioned
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Question 46 : MongoDB uses the ________ notation to access the elements of an array and to access the fields of an embedded document.
1. Dot
2. Array
3. Nested Sets
4. None of the mentioned
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Question 47 : Index keys that are of the _______ type are more efficiently stored in the index.
1. Materialized Paths
2. BinData
3. String
4. None of the mentioned
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Question 48 : To ensure functioning replication, do not store values that are of the _______ regular expression type in the _id field.
1. JSON
2. XML
3. JScript
4. None of the mentioned
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Question 49 : To store documents larger than the maximum size, MongoDB provides the _______ API.
1. Grid
2. MMS
3. GridFS
4. None of the mentioned
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Question 50 : MongoDB documents are composed of field-and-value pairs and have the following structure:
1. field1:; value1
2. field1: value1;
3. field1: value1
4. none of the mentioned
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