Free MongoDB C100DBA Exam Dumps Questions & Answers

Which command can be used to rebuild the indexes on a collection in MongoDB?

• A.db.collection.reIndex({author:l})
• B.db.collection.relndexQ
• C.db.collection.createlndex({relndex:l})
• D.db.collection.createIndex({author:l}).reIndex()

The MongoDB explain() method does not support which of the following verbosity mode:

• A.allPlansExecution
• B.customExecutionStats
• C.executionStats
• D.queryPlanner

You are comparing values of different BSON types in mongodb. You want to compare from lowest to highest. Which comparison order is used?

• A.MinKey, Null, Numbers,Object,Array,BinData,Symbol, String
• B.Object/Array^inData/Symbol,MinKey, Null, Numbers,String
• C.MinKey, Null, Numbers,Symbol, String,Object,Array,BinData
• D.Objec^Array^inData,Symbol, String,MinKey, Null, Numbers

What tool would you use if you want to save a gif file in mongo?

You have the following index on the toys collection:
{
"manufacturer" : 1,
"name" : 1,
"date" : -1
}
Which of the following is able to use the index for the query? Check all that apply.

• A.db.toys.find( { name : "Big Rig Truck", date : "2013-02-01", manufacturer : "Tanko"
• B.db.toys.find( { date : "2015-03-01", manufacturer : "Loggo", name : "Brick Set" } )
• C.db.toys.find( { manufacturer : "Matteo", name : "Barbara", date : "2014-07-02" } )