If the value of totalKeysExamined is 30000 and the value of totalDocsExamined is 0, which option is correct?

How many chunks can there be if the shard key cardinality is 4?

When is sharding needed? (choose all that apply)

When should you avoid embedding one document within another in MongoDB?

Which MongoDB shell command should you use to back up a database?

Which shell query displays all citizens with an age greater than or equal to 21?

A property used to address servers based on their real-world locations is called:

You cannot use characters among /\. "*<>:|? in database names, in release version

In MongoDB's Geospatial Indexing, if you want to create & use index on EARTH, what is NOT TRUE?

You want to minus one to field foo, what should you use?

What term is use to describe the order that a database stores documents on disk?