Answer / Sakshi Upadhyay

A replica set in MongoDB is a group of member nodes that maintain the same data. It provides high availability and data durability by ensuring that there are multiple copies of the data across different servers. A replica set has one primary node responsible for handling writes, while the secondary nodes are read-only.

When was mongodb created?

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Why is mongodb?

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How do you see the locking status in mongo instances?

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Does mongodb have tables?

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Which language is used in mongodb?

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What is difference between mongod and mongodb?

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Does mongodb store data in memory?

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Should you start out with sharded or with a non-sharded mongodb environment?

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Why are data files so large?

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What is projection in mongodb?

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Does mongodb support primary-key, foreign-key relationship?

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What is a secondary or slave?

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