Question 41 : You can combine the ________ constraint with the sparse index to filter these null values from the unique index and avoid the error.
1. Hashed
2. Unique
3. sparse
4. compound
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Question 42 : On replica sets, the TTL background thread only deletes documents on :
1. primary
2. secondary
3. upadte
4. none of the mentioned
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Question 43 : The background task that removes expired documents runs every ________ seconds.
1. 15
2. 45
3. 60
4. 120
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Question 44 : When the TTL thread is active, you will see _______ operations in the output of db.currentOp()
1. delete
2. update
3. insert
4. none of the mentioned
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Question 45 : ________ indexes expire documents after the specified number of seconds has passed since the indexed field value.
1. Hashed
2. Unique
3. Multikey
4. TTL
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Question 46 : When used with the _____ operator, $geoWithin returns documents based on grid coordinates and does not query for GeoJSON shapes.
1. $box
2. $circle
3. $shape
4. All of the mentioned
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Question 47 : $geoWithin replaces _______ in MongoDB 2.4.
1. $withing
2. $gwithin
3. $within
4. All of the mentioned
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Question 48 : To query with a single-ringed GeoJSON polygon whose area is greater than a single hemisphere, the $geometry expression must specify the custom MongoDB ________
1. CRS
2. CDS
3. CLS
4. None of the mentioned
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Question 49 : If the specified polygon is _______ than a single hemisphere, the behavior of $geoWithin with the MongoDB CRS is the same as with the default CRS
1. smaller
2. bigger
3. equal
4. all of the mentioned
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Question 50 : The $geoWithin operator uses the _______ operator to specify the GeoJSON object.
1. $sphere
2. $geoin
3. $geometry
4. All of the mentioned
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