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_______ groups documents by some specified expression and outputs to the next stage a document for each distinct grouping

Correct Answer : B

______ can be used to iterate the cursor of document results returned by db.collection.find()

Correct Answer : A

Point out the wrong statement

Correct Answer : A

The ________ message is used to update a document in a collection

Correct Answer : B

Which of the following preference determines how the client direct read operations to the set?

Correct Answer : A

MongoDB is a _________ database that provides high performance, high availability, and easy scalability

Correct Answer : C

Which of the following method is used to query documents in collections?

Correct Answer : A

MongoDB applies the _____ phase to each input document in mapreduce.

Correct Answer : A

As per the aggregation pipeline optimization concepts, if you have a $sort followed by a $match:

Correct Answer : A

__________ returns the JavaScript representation in the form of a string literal

Correct Answer : B

A query may include a ___________ that specifies the fields from the matching documents to return

Correct Answer : B

To describe the message structure, a ________ like struct is used

Correct Answer : C

Which of the following provides similar functionality to join?

Correct Answer : C

Which of the operator is similar to order by clause in RDBMS?

Correct Answer : A

Which of the following functionality is used for aggregation framework?

Correct Answer : B

A collection and a document in MongoDB is equivalent to which of the SQL concepts respectively?

Correct Answer : A

An index cannot cover a query on a _______ collection when run against a mongos if the index does not contain the shard key.

Correct Answer : B

After starting the mongo shell, your session will use the ________ database by default

Correct Answer : C

Which of the following flag can be set by mongo shell?

Correct Answer : B

____________ works similar to HAVING clause in SQL

Correct Answer : C

Which index is used to index the content stored in arrays?

Correct Answer : A

With a receipt acknowledged write concern, the _________confirms that it received the write operation and applied the change to the in-memory view of data

Correct Answer : A

Which of the following will implicitly create the collection testData?

Correct Answer : B

Point out the wrong statement

Correct Answer : C

The output of the reduce function may pass through a ______ function to further condense or process the results of the aggregation

Correct Answer : A

Which of the following language is MongoDB written in?

Correct Answer : D

Which of the following mode defaults to false?

Correct Answer : A

_____________ is used to control mongod commits in the journal

Correct Answer : C

Point out the correct statement

Correct Answer : A

What is the minimum sensible number of voting nodes to a replica set?

Correct Answer : B