MongoDB
C100DBA · Question #121
C100DBA Question #121: Real Exam Question with Answer & Explanation
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Question
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.
Options
- Adb.sample.update( { "_id" : 3 } , { "$set" : { "_id" : 7 , "c" : 4 > > )
- Bdb.sample.update( { "_id" : 3 > , { "_id" : 7 , "c" : 4 > , { "justOne" : true > ) / □This operation
- Cdb.sample.update( { "_id" : 3 > , { "_id" : 7 , "c" : 4 , { "$unset" : [ "a" , "b" ] } } )
- Ddb.sample.update( { "_id" : 3 > , { "_id" : 7 , "c" : 4 > )
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