MongoDB Exam C100DBA Topic 1 Question 81 Discussion

Actual exam question for MongoDB's C100DBA exam

Question #: 81
Topic #: 1

Write the command(s) are correct to enable sharding on a database "testdb" and shard a collection "testCollection" with _id as shard key.

AshenableShardingtestdbshshardCollectiontestdbtestCollectionidtrue

Show Suggested Answer

Suggested Answer: A

by Karl at Feb 08, 2024, 11:28 PM

Limited Time Offer

25%

Off

Get Premium C100DBA Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

Submit Cancel

Crista

6 months ago

Great, I feel more confident now about setting up sharding on this database

upvoted 0 times

...

Leonida

6 months ago

That makes sense, because we need to specify the collection name within the 'shardCollection' command

upvoted 0 times

...

Lawanda

6 months ago

I think the correct command is sh.enableSharding("testdb") followed by sh.shardCollection("testdb.testCollection", {"_id": 1})

upvoted 0 times

...

Crista

6 months ago

But don't we also need to enable sharding on the 'testCollection' collection with '_id' as the shard key?

upvoted 0 times

...

Leonida

7 months ago

No, I believe it should be sh.enableSharding("testdb")

upvoted 0 times

...

Crista

7 months ago

I think the correct command is sh.shardCollection("testdb", "testCollection", {"_id": "hashed"})

upvoted 0 times

...

Lashon

7 months ago

That makes sense. Enabling sharding on 'testdb' and sharding 'testCollection' with '_id' as shard key will help distribute data efficiently.

upvoted 0 times

...

Burma

7 months ago

Yes, I agree with Celestine. And to shard a collection with '_id' as shard key, the command should be 'sh.shardCollection('testdb.testCollection', {_id: 1})'.

upvoted 0 times

...

Celestine

7 months ago

I think the correct command to enable sharding on a database 'testdb' is 'sh.enableSharding('testdb')'.

upvoted 0 times

...