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Welcome to the Sharding Concepts and Sharded Cluster MCQs Page

Dive deep into the fascinating world of Sharding Concepts and Sharded Cluster with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Sharding Concepts and Sharded Cluster, a crucial aspect of MongoDB. In this section, you will encounter a diverse range of MCQs that cover various aspects of Sharding Concepts and Sharded Cluster, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within MongoDB.

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Check out the MCQs below to embark on an enriching journey through Sharding Concepts and Sharded Cluster. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of MongoDB.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Sharding Concepts and Sharded Cluster. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Sharding Concepts and Sharded Cluster MCQs | Page 9 of 10

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Q81.
_______ runs a database command against the admin database of a mongos instance.

a.

sh._checkFullName()

b.

sh._adminCommand()

c.

sh.getBalancerLockDetails()

d.

all of the mentioned

Discuss
Answer: (b).sh._adminCommand()
Q82.
Point out the correct statement.

a.

The unique constraint on indexes ensures that only one document can have a value for a field in a collection

b.

MongoDB support creating new unique indexes in sharded collections

c.

If you use a compound shard key, you cannot enforce uniqueness on the combination of component keys in the shard key

d.

All of the mentioned

Discuss
Answer: (a).The unique constraint on indexes ensures that only one document can have a value for a field in a collection
Q83.
________ tests to see if the mongo shell is connected to a mongos instance.

a.

sh._checkMongos()

b.

sh.addShard()

c.

sh._lastMigration()

d.

all of the mentioned

Discuss
Answer: (a).sh._checkMongos()
Q84.
_______ reports on the active balancer lock, if it exists.

a.

sh._checkFullName()

b.

sh._adminCommand()

c.

sh.getBalancerLockDetails()

d.

all of the mentioned

Discuss
Answer: (c).sh.getBalancerLockDetails()
Q85.
Point out the wrong statement.

a.

The best way to ensure a field has unique values is to generate universally unique identifiers (UUID,) such as MongoDB’s ‘ObjectId values

b.

Most deployments will not need to shard the files collection

c.

The files collection is typically small, and only contains metadata

d.

None of the mentioned

Discuss
Answer: (d).None of the mentioned
Q86.
_________ reports on the last chunk migration.

a.

sh._checkMongos()

b.

sh.addShard()

c.

sh._lastMigration()

d.

all of the mentioned

Discuss
Answer: (c).sh._lastMigration()
Q87.
_________ removes an association between a range shard keys and a shard tag.

a.

sh.removeTagRange()

b.

sh._checkMongos()

c.

sh.disableBalancing()

d.

none of the mentioned

Discuss
Answer: (a).sh.removeTagRange()
Q88.
_________ disable balancing on a single collection in a sharded database.

a.

sh.removeTagRange()

b.

sh._checkMongos()

c.

sh.disableBalancing()

d.

none of the mentioned

Discuss
Answer: (c).sh.disableBalancing()
Q89.
_______ activates the sharded collection balancer process if previously disabled using sh.disableBalancing().

a.

sh.getBalancerHost()

b.

sh.enableBalancing()

c.

sh.enableSharding()

d.

all of the mentioned

Discuss
Answer: (a).sh.getBalancerHost()
Q90.
________ returns a boolean to report if the balancer is currently enabled.

a.

sh.getBalancerHost()

b.

sh.enableBalancing()

c.

sh.getBalancerState()

d.

none of the mentioned

Discuss
Answer: (c).sh.getBalancerState()
Page 9 of 10

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