Question 1

In order to ensure that you can maintain high availability in the face of server failure, you should implement which of the following?

Options :

A : Sharding

B : Properly defined user roles

C : Replication

D : Put indexes on all of your documents

E : The proper storage engine

Answer: C

Question 2

Which option can be used with update command so that a new document gets created if no matching document is found based on the query condition?

Options :

A : upsert command instead of update command

B : This has to be handled in application code (Node.js, PHP, JAVA, C#, etc.) and cannot be handled in mongo shell query

C : {update: true, insert: true} as the third parameter of update command

D : Specify {upsert : true } as the third parameter of update command

Answer: D

Question 3

Which mongodb tool is used to report details on number of database operations in MongoDB?

Options :

A : mongostat

B : mongotop

C : mongorestore

D : mongodump

Answer: A

Question 4

Which of the following collections stores authentication credentials in MongoDB?

Options :

A : test.users

B : local.users

C : system.users

D : users.users

Answer: C

Question 5

Which of the following commands can cause the database to be locked?

Options :

A : All of the above

B : Inserting data

C : Map-reduce

D : Issuing a query

Answer: A

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