Does mongodb support foreign key constraints?

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When do we use namespace in mongodb?

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Mongodb uses bson to represent document structures. True or false?

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Can you create an index on an array field in mongodb? If yes, what happens in this case?

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what is a replica set?

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Explain can you move old files in the movechunk directory?

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How can you see the connection used by mongos?

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What is storage encryption?

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Explain the structure of objectid in mongodb.?

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What is crud?

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what is the command syntax for inserting a document?

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What is use of gridfs in mongodb?

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What is “namespace” in mongodb?

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What do you understand by nosql databases? Is mongodb a nosql database? Explain.

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By default, which index is created by mongodb for every collection?

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