Answer / Meenakshi Chauhan

MongoDB supports multi-document transactions through the WiredTiger and MMAPv1 storage engines. For locking, MongoDB uses a MVCC (Multi-version Concurrency Control) approach which allows multiple versions of documents to coexist, reducing contention.

Why is mongodb used?

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How index is used in mongodb?

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What language you can use with mongodb?

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What is nosql database and why you use nosql database?

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Which are the different languages supported by mongodb?

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Can you lock more than one database at the same time in mongodb?

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What are the different types of nosql databases? Give some examples.

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Is mongodb a graph database?

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What is the role of 8 analysers in mongodb?

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What is index and how it is used in mongodb?

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

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What is the difference between mongodb and redis database?

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