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Which of the following commands finds all the documents in the posts collection with post timestamp field as null?
A. db.posts.find( { post_timestamp: { $fieldtype: null } } )
B. db.posts.find( { post_timestamp: { $type: null } } )
C. db.posts.find( { post_timestamp : { $type; 10 > > )
D. db.posts.find( { post_timestamp: { $fieldtype: 10 } } )
What is the first task that a secondary would perform on being prompted by another secondary for an election?
A. Start the election process for primary
B. Vote for the first secondary so that it would become the next primary
C. Vote for itself and then call for election
D. Connect to primary to confirm its availability
Aggregation Pipelines have a limit of:
A. No limit on document and 100 MB RAM
B.2 MB document and no limit on RAM
C. 2 MB document and 100 MB RAM
D. 16 MB document and 100 MB RAM
Which option should be used to update all the documents with the specified condition in the MongoDB query?
A. specify {all: true} as the third parameter of update command
B. updateAII instead of update
C. specify {updateAII: true} as the third parameter of update command
D. specify {multi : true} as the third parameter of update command
Which mongodb tools allow us to work with our data in a human readable format?
A. mongodump
B. mongostat
C. mongoimport
D. mongoexport
In which of the following scenarios is sharding not the correct option. Select all that apply.
A. The write operations on the collection are low
B. The write operations on the collection are very high
C. The working set in the collection is expected to grow very large in size
D. The collection is a read intensive collection with less working set
In a sharded cluster, from which node does one stop the balancer process before initiating backup?
A. Any node
B. replicaset primary node
C. config server node
D. mongos node