Adaface Sample MongoDB Questions

Consider the following indexes on "musk" collection and the written queries. Select the queries that will use an index:

A) db.musk.find( { title : "SpaceX" } )
            B) db.musk.find( { _id : 22, date: ISODate("2020-01-01" } ) 
            C) db.musk.find( { date: ISODate("2020-01-01"), biz : "ElonSpaceX" } )
            D) db.musk.find( { contact : "111-111-1111"), info : "000-000-0000" } )

Given the following movies document in MongoDB, What will be the output of the query:

Given the following sample document in Mongodb:
            
            { x: 5, y: 3, z: 2, w: 1 }

If the collection name is 'adaface' with a compound index { x: 1, y: 1, z: 1, w: 1}, which of the following queries will not use in-memory sorting?

Read the following chunk and pick the correct statements that apply:

A: The shard key defined for "sessions" collection is {userId: 1, sessionId: 1}
            B: All documents in chunk "test.sessions-abc-yxz" are located in shard "sh-1"
            C: Documents with fields {"userId": 10, "sessionId": "AB01" } are located part of chunk "test.sessions-abc-yxz"