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NEW QUESTION 43
What is the built-in database called admin in MongoDB for?

A. The admin database plays an important role in the authentication and authorization process. Certain actions performed by administrators also require access to this database.B. The admin database is used to store information about shards in shared MongoDB cluster.C. The admin database stores data describing the MongoDB server. For replica sets, it also stores information about the replication process.

Answer: A

Explanation:
https://docs.mongodb.com/manual/tutorial/manage-users-and-roles/

 

NEW QUESTION 44
Select all true statements regarding to multikey indexes.

A. Multikey indexes don't support indexes on multiple array fields on single documents.B. An index doesn't become multikey until a document that has an array value is inserted.C. Multikey indexes allow us to index on array fields.

Answer: A,B,C

Explanation:
https://docs.mongodb.com/manual/core/index-multikey/

 

NEW QUESTION 45
Suppose you have a mobile_games collection with the following document structure: { game: "Fishing Clash", company: "Ten Square Games", platforms: ['Android', 'IOS'], ... release_USA: ISODate("2017-04-09T01:00:00+01:00"), release_France: ISODate("2017-04-09T01:00:00+01:00"), release_Italy: ISODate("2017-08-17T01:00:00+01:00"), ... } Are there any problems with this document structure?

A. No, everything is correct. There is no room for improvement.B. Yes, a search for a release date will require looking across many fields at once which is inefficient.

Answer: B

Explanation:
https://docs.mongodb.com/manual/core/document/

 

NEW QUESTION 46
Which cursor method should you use to specify the maximum number of documents returned?

A. cursor.limit()B. cursor.hint()C. cursor.map()D. cursor.skip()E. cursor.count()

Answer: A

Explanation:
https://docs.mongodb.com/manual/reference/method/cursor.limit/

 

NEW QUESTION 47
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