Q. Which of the following query selects documents in the records collection that match the condition { “user_id”: { $lt: 42 } }?

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Q. Which of the following functionality is used for aggregation framework?

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Q. To suppress the _id field from the result set, specify _________ in the projection document.

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Q. Which of the following is not a projection operator?

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

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Q. Point out the correct statement.

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Q. Which of the following will display complete list of available cursor flags?

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

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Q. Point out the wrong statement.

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Q. ______________ specifies the number of documents to return in each batch of the response from the MongoDB instance.

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Q. The __________ method returns a document that includes a metrics field.

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Q. ____________ is a client or database-generated identifier that uniquely identifies this message.

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Q. Which of the following operator is not very selective?

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

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Q. ___________ concern describes the guarantee that MongoDB provides when reporting on the success of a write operation.

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Q. Point out the correct statement.

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Q. When inserts, updates and deletes have a _________ write concern, write operations return quickly.

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Q. The mongo shell and the MongoDB drivers use __________ as the default write concern.

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Q. Point out the wrong statement.

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Q. _____________ is used to control mongod commits in the journal.

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