Free MongoDB C100DBA Exam Dumps Questions & Answers

What is the equivalent command in MongoDB for the following SQL query?
SELECT * FROM posts WHERE author like " %john% "

• A.  db.posts.find( { $like: {author: /John/} } )
• B.  db.posts.find( { author: /John/ } )
• C.  db.posts.find( { author: {$like: /John/} } )
• D.  db.posts.find( { author: /AjohnA/ > )

What is the purpose of elections in a replica set?

• A.  A mechanism to choose a new primary when the current primary is no longer available.
• B.  A mechanism for replicating data across all replica set members asynchronously.
• C.  A mechanism to add new indexes to a running replica set.
• D.  A mechanism to add additional secondaries when the current secondaries are unavailable.

Which TWO indicators should an administrator keep an eye on to determine if the storage capacity is nearing its limit?

• A.  Message errno:28 No space left on device is present in the log file.
• B.  The execution time of the same query increases over time.
• C.  The number of available read or write tickets is consistently low.
• D.  Disk space utilization on the server is consistently above 90%.
• E.  The number of documents in the database is increasing.

What is the correct read preference option to direct all read operations to the secondary?

• A.  secondaryPreferred
• B.  secondaries
• C.  secondary
• D.  secondariesPreferred

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