What is the difference between mongodb and cassandra?

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Explain the covered query in mongodb.

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Can journaling features be used to perform safe hot backups?

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What is the method to configure the cache size in mongodb?

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What is replica set in mongodb?

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Can you achieve primary key - foreign key relationships in mongodb?

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What language you can use with mongodb?

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

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How does mongodb provide concurrency?

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What is a storage engine in mongodb?

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What is the importance of covered query?

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Does mongodb need a lot space of random access memory (ram)?

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What is crud in mongodb?

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What is the usage of profiler in mongodb?

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

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