22 + Interview Questions in MongoDB Perpetuus in BigData Page 1 InterviewSolution

1.	Find the command that forces MongoDB to use a particular index for a db.collection.find() operation.
Answer» Find the COMMAND that forces MongoDB to USE a particular index for a db.collection.find() operation. Choose the correct ANSWER from below list (1)EXPLAIN() (2)hint() (3)hit() Answer:-(2)hint()

Discussion

2.	Find a technique of splitting up a large collection among multiple servers.
Answer» FIND a technique of splitting up a LARGE collection AMONG multiple servers. Choose the correct ANSWER from below list (1)Indexes (2)SHARDING (3)Replication Answer:-(2)Sharding

Discussion

3.	Default size of Chunk in MongoDB is ___________.
Answer» Default size of Chunk in MONGODB is ___________. Choose the correct answer from below LIST (1)64 GB (2)128 KB (3)64 KB (4)64 MB Answer:-(4)64 MB

Discussion

4.	In MongoDB, which is the storage measure used by masters oplog?
Answer» In MongoDB, which is the storage MEASURE used by masters oplog? CHOOSE the correct answer from below list (1)BYTE (2)MB (3)GB (4)KB Answer:-(3)GB

Discussion

5.	In MongoDB, _________ helps to synchronize data across multiple servers.
Answer» In MONGODB, _________ helps to SYNCHRONIZE data ACROSS MULTIPLE servers. Choose the correct ANSWER from below list (1)Indexes (2)Sharding (3)Replication Answer:-(3)Replication

Discussion

6.	In MongoDB, identify the command that adds an shard with a sharded Cluster.
Answer» In MONGODB, IDENTIFY the command that adds an shard with a SHARDED Cluster. Choose the correct answer from below list (1)add (2)Shardadd (3)addShard (4)ShardAdd Answer:-(3)addShard

Discussion

7.	Mongo client will generate _____ command to initiate a new replica set.
Answer» Mongo client will generate _____ command to initiate a new replica set. Choose the CORRECT answer from below LIST (1)rs.initiate() (2)rs.conf() (3)db.isMaster() (4)rs.status() Answer:-(1)rs.initiate()

Discussion

8.	Which is the command to Check the Size of the Oplog?
Answer» Which is the command to Check the Size of the Oplog? CHOOSE the CORRECT answer from below list (1)rs.conf() (2)rs.printSlaveReplicationInfo() (3)rs.initiate() (4)rs.printReplicationInfo() Answer:-(4)rs.printReplicationInfo()

Discussion

9.	Which of the following will control the amount of logging output that mongodb writes to the log?
Answer» Which of the FOLLOWING will CONTROL the amount of LOGGING OUTPUT that mongodb writes to the log? Choose the correct answer from below list (1)operationProfiling.mode (2)operationProfiling.slowOpThresholdMs (3)systemLog.verbosity Answer:-(3)systemLog.verbosity

Discussion

10.	Choose the operations that can be captured by database profiler?
Answer» Choose the operations that can be CAPTURED by DATABASE profiler? Choose the correct ANSWER from below list (1)Read operations (2)WRITE operations (3)Cursor Operations (4)All the Options Answer:-(4)All the Options

Discussion

11.	Which model is used when there contains relationships between entities?
Answer» Which model is USED when there contains relationships between entities? CHOOSE the correct ANSWER from below list (1)External Model (2)All the Options (3)Reference Model (4)Embedded Model Answer:-(4)Embedded Model

Discussion

12.	The ____________ command returns a document that provides an overview of the databases state.
Answer» The ____________ command returns a document that provides an overview of the DATABASES state. Choose the CORRECT answer from below list (1)hit() (2)explain() (3)HINT() (4)ServerStatus() Answer:-(4)ServerStatus()

Discussion

13.	Which will be the command to return information on query plans and execution statistics of the query plans?
Answer» Which will be the command to return information on QUERY PLANS and EXECUTION statistics of the query plans? Choose the correct answer from below list (1)explain() (2)stats() (3)All the Options (4)queryplan() Answer:-(1)explain()

Discussion

14.	Which of the following can be used to check the status of replica set?
Answer» Which of the following can be used to check the status of replica set? Choose the correct ANSWER from below list (1)rs.status() (2)rs.initiate() (3)db.isMaster() (4)rs.conf() Answer:-(1)rs.status()

Discussion

15.	By default, MongoDB automatically logs slow queries above _____ ms to the log.
Answer» By default, MONGODB AUTOMATICALLY logs slow queries above _____ MS to the log. Choose the correct ANSWER from below list (1)16 (2)100 (3)64 (4)264 Answer:-(2)100 MongoDB automatically logs,mongodb questions,Mongodb logs slow,mongodb faq,MongoDB Perpetuus

Discussion

16.	Which is the method used to check the current length of replication lag?
Answer» Which is the method used to check the current length of replication lag? Choose the correct ANSWER from below LIST (1)rs.status() (2)rs.printSlaveReplicationInfo() (3)rs.initiate() (4)rs.conf() Answer:-(2)rs.printSlaveReplicationInfo()

Discussion

17.	______ can be used to check if the connected node is primary or not?
Answer» ______ can be used to CHECK if the connected NODE is primary or not? Choose the CORRECT ANSWER from below list (1)rs.status() (2)db.isMaster() (3)rs.conf() (4)rs.initiate() Answer:-(2)db.isMaster()

Discussion

18.	In MongoDB, _________ is the operator limits the contents of an array field from the query.
Answer» In MongoDB, _________ is the operator LIMITS the contents of an ARRAY FIELD from the query. Choose the CORRECT answer from below list (1)$Match (2)$elemMatch (3)$slice Answer:-(2)$elemMatch

Discussion

19.	Which is the method used in MongoDB to Grant user?
Answer» Which is the METHOD USED in MongoDB to Grant user? Choose the correct answer from below LIST (1)db.grantRole() (2)All the Options (3)db.grantRolesToUser() (4)db.grantToUser() Answer:-(3)db.grantRolesToUser()

Discussion

20.	Choose the indexes to index the content stored in arrays.
Answer» CHOOSE the indexes to index the CONTENT stored in arrays. Choose the correct ANSWER from below list (1)ARRAY Index (2)Singlekey indexes (3)MULTIKEY indexes (4)Compoundkey indexes Answer:-(3)Multikey indexes

Discussion

21.	Which method is used to return information for all users associated with a database?
Answer» Which METHOD is used to return information for all users ASSOCIATED with a DATABASE? Choose the correct answer from below LIST (1)db.Users() (2)db.returnUsers() (3)db.getUsers() Answer:-(3)db.getUsers()

Discussion

22.	Choose the data model which allows applications to store related pieces of information in the same database record.
Answer» CHOOSE the data model which allows APPLICATIONS to store related pieces of information in the same database record. Choose the correct ANSWER from below list (1)External Model (2)All the Options (3)Embedded Model (4)Reference Model Answer:-(3)Embedded Model

Discussion

Explore topic-wise InterviewSolutions in .

Find the command that forces MongoDB to use a particular index for a db.collection.find() operation.

Find a technique of splitting up a large collection among multiple servers.

Default size of Chunk in MongoDB is ___________.

In MongoDB, which is the storage measure used by masters oplog?

In MongoDB, _________ helps to synchronize data across multiple servers.

In MongoDB, identify the command that adds an shard with a sharded Cluster.

Mongo client will generate _____ command to initiate a new replica set.

Which is the command to Check the Size of the Oplog?

Which of the following will control the amount of logging output that mongodb writes to the log?

Choose the operations that can be captured by database profiler?

Which model is used when there contains relationships between entities?

The ____________ command returns a document that provides an overview of the databases state.

Which will be the command to return information on query plans and execution statistics of the query plans?

Which of the following can be used to check the status of replica set?

By default, MongoDB automatically logs slow queries above _____ ms to the log.

Which is the method used to check the current length of replication lag?

______ can be used to check if the connected node is primary or not?

In MongoDB, _________ is the operator limits the contents of an array field from the query.

Which is the method used in MongoDB to Grant user?

Choose the indexes to index the content stored in arrays.

Which method is used to return information for all users associated with a database?

Choose the data model which allows applications to store related pieces of information in the same database record.