MongoDB Exam C100DBA Topic 1 Question 53 Discussion

Actual exam question for MongoDB's C100DBA exam

Question #: 53
Topic #: 1

Consider the following example document from the sample collection. All documents in this collection have the same schema.

Which of the following queries will replace this with the document.

Adb.sample.update( { '_id' : 3 } , { '$set' : { '_id' : 7 , 'c' : 4 > > )

Bdb.sample.update( { '_id' : 3 > , { '_id' : 7 , 'c' : 4 > , { 'justOne' : true > ) / This operation cannot be done with a single query.

Cdb.sample.update( { '_id' : 3 > , { '_id' : 7 , 'c' : 4 , { '$unset' : [ 'a' , 'b' ] } } )

Ddb.sample.update( { '_id' : 3 > , { '_id' : 7 , 'c' : 4 > )

Show Suggested Answer

Suggested Answer: C

by Judy at Jun 14, 2022, 05:45 PM

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