Which of the following roles provides minimal privileges needed for backing up data in MongoDB?

• A.backup
• B.restore
• C.update

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MongoDB can benefit from adding more RAM to your servers.

• A.Yes
• B.No

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What are some of the uses for the $ sign in MQL (MongoDB Query Language)? (select 2)

• A.The $ sign has no special meaning in MQL.
• B.When $ is used to prefix a field name,wwwit.dumpspandarepresentsthev.luecomstored in that field.
• C.$ denotes an operator - all MQL operators have the $ prefix.

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