MCQOPTIONS
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MCQOPTIONS
This section includes 41 Mcqs, each offering curated multiple-choice questions to sharpen your Mongodb knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following parameter represents minimum value of the shard key range to include in the tag? |
| A. | min |
| B. | max |
| C. | maximum |
| D. | minimum |
| Answer» E. | |
| 2. |
Changing the _______ option will change the port that mongod listens for incoming connections on. |
| A. | –shardsrvkey |
| B. | –shardsrv |
| C. | –shard |
| D. | All of the mentioned |
| Answer» C. –shard | |
| 3. |
sh.splitFind () Splits the chunk that contains the shard key value specified by the query at the chunk’s ______ point. |
| A. | smean |
| B. | stdev |
| C. | median |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 4. |
For most deployments, the default value of chunk is _____ megabytes is ideal. |
| A. | 16 |
| B. | 32 |
| C. | 64 |
| D. | 72 |
| Answer» D. 72 | |
| 5. |
With hash based partitioning, two documents with _____ shard key values are unlikely to be part of the same chunk. |
| A. | close |
| B. | open |
| C. | partially close |
| D. | all of the mentioned |
| Answer» B. open | |
| 6. |
With __________ enabled, the source shard archives the documents in the migrated chunks in a directory named after the collection namespace. |
| A. | sharding.archiveChunks |
| B. | sharding.archiveMovedChunks |
| C. | shard.archiveMovedChunks |
| D. | none of the mentioned |
| Answer» C. shard.archiveMovedChunks | |
| 7. |
You can set the _________ option on the balancer configuration to set different write concern semantics. |
| A. | writeConcern |
| B. | updateConcern |
| C. | readConcern |
| D. | all of the mentioned |
| Answer» B. updateConcern | |
| 8. |
_______ forces an update to the cluster metadata cached by a mongos. |
| A. | config |
| B. | flushconf |
| C. | flushRouterConfig |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 9. |
_______ enables the balancer and waits for balancing to start. |
| A. | sh.waitForBalancer() |
| B. | sh.startBalancer() |
| C. | sh.waitForDLock() |
| D. | all of the mentioned |
| Answer» C. sh.waitForDLock() | |
| 10. |
The ______ instances are the routers for the cluster. |
| A. | mongod |
| B. | mongos |
| C. | collection |
| D. | all of the mentioned |
| Answer» C. collection | |
| 11. |
_________ disable balancing on a single collection in a sharded database. |
| A. | sh.removeTagRange() |
| B. | sh._checkMongos() |
| C. | sh.disableBalancing() |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 12. |
When a chunk grows beyond the chunk size, MongoDB attempts to split the chunk into smaller chunks, always based on ranges in the _____________ |
| A. | replica set |
| B. | shard key |
| C. | tag sets |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 13. |
A single sharded cluster must have exclusive use of its _______ servers. |
| A. | local |
| B. | global |
| C. | config |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 14. |
How many background process runs behind balanced cluster? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | All of the mentioned |
| Answer» C. 3 | |
| 15. |
The _____________ collection holds documents for each tagged shard key range in the cluster. |
| A. | tags |
| B. | databases |
| C. | version |
| D. | none of the mentioned |
| Answer» B. databases | |
| 16. |
Which of the following parameter denotes name of the shard from which to remove a tag? |
| A. | shard |
| B. | tag |
| C. | chunk |
| D. | none of the mentioned |
| Answer» B. tag | |
| 17. |
_________ waits for a change in ping state from one of the mongos in the sharded cluster. |
| A. | sh.waitForBalancer() |
| B. | sh.startBalancer() |
| C. | sh.waitForPingChange() |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 18. |
Which of the following command is used to determine split points? |
| A. | splitVector |
| B. | medianKey |
| C. | movePrimary |
| D. | none of the mentioned |
| Answer» B. medianKey | |
| 19. |
Which of the following command that validates index on shard key? |
| A. | checkShardingIndex |
| B. | checkSIndex |
| C. | enableSharding |
| D. | all of the mentioned |
| Answer» B. checkSIndex | |
| 20. |
You can return a list of the collections, with the following helper ______________ |
| A. | show collects |
| B. | show collection |
| C. | show collections |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 21. |
The mongos provides an interface for applications to interact with sharded clusters that hides the complexity of data ______ |
| A. | partitioning |
| B. | replication |
| C. | sharding |
| D. | none of the mentioned |
| Answer» B. replication | |
| 22. |
If the collection is empty then MongoDB will create the index as part of the ________ |
| A. | shardCollectionkey() |
| B. | shardCollection() |
| C. | keyCollection() |
| D. | all of the mentioned |
| Answer» C. keyCollection() | |
| 23. |
The mergeChunks command requires at least _______ empty input chunk. |
| A. | one |
| B. | two |
| C. | three |
| D. | all of the mentioned |
| Answer» B. two | |
| 24. |
__________ splits the chunk that contains the shard key value specified by the query at the chunk’s median point. |
| A. | sh.Find() |
| B. | sh.splitFind() |
| C. | sh.split() |
| D. | all of the mentioned |
| Answer» C. sh.split() | |
| 25. |
_______ 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 |
| Answer» B. sh.enableBalancing() | |
| 26. |
You can only issue listShards against the ________ database. |
| A. | local |
| B. | admin |
| C. | temp |
| D. | none of the mentioned |
| Answer» C. temp | |
| 27. |
________ servers store the cluster’s metadata. |
| A. | Local |
| B. | Config |
| C. | Master |
| D. | All of the mentioned |
| Answer» B. Config | |
| 28. |
MongoDB generates _______ values upon document creation to produce a unique identifier for the object. |
| A. | ObjectId |
| B. | CompId |
| C. | DoctId |
| D. | All of the mentioned |
| Answer» B. CompId | |
| 29. |
A shard key that increases monotonically will not hinder performance if most of your write operations are ____ operations. |
| A. | insert() |
| B. | update() |
| C. | delete() |
| D. | all of the mentioned |
| Answer» C. delete() | |
| 30. |
The default value _________ becomes true for all chunk migrations. |
| A. | secThrottle |
| B. | secondaryThrottle |
| C. | primaryThrottle |
| D. | all of the mentioned |
| Answer» C. primaryThrottle | |
| 31. |
The chunkSize and ________ options, passed at startup to the mongos, do not affect the chunk size after you have initialized the cluster. |
| A. | –Size |
| B. | –chunkSize |
| C. | –chunk |
| D. | None of the mentioned |
| Answer» C. –chunk | |
| 32. |
_______ based partitioning, by contrast, ensures an even distribution of data at the expense of efficient range queries. |
| A. | Hash |
| B. | Range |
| C. | Table |
| D. | None of the mentioned |
| Answer» C. Table | |
| 33. |
________ 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 |
| Answer» D. none of the mentioned | |
| 34. |
Use ________ to ensure that the balancer migrates documents that exist within the specified range to a specific shard. |
| A. | sh.addShardTag() |
| B. | sh.addTag() |
| C. | sh.aShardTag() |
| D. | all of the mentioned |
| Answer» B. sh.addTag() | |
| 35. |
________ command verifies that a process is a mongos. |
| A. | medianKey |
| B. | isdbgrid |
| C. | movePrimary |
| D. | none of the mentioned |
| Answer» C. movePrimary | |
| 36. |
To divide the shard key values into chunks, MongoDB uses _____ based partitioning. |
| A. | range |
| B. | b tree |
| C. | document |
| D. | isMaster |
| Answer» B. b tree | |
| 37. |
_________ is an internal command that supports the sharding functionality. |
| A. | getBalancerHost() |
| B. | getShardMap |
| C. | enableSharding() |
| D. | all of the mentioned |
| Answer» C. enableSharding() | |
| 38. |
_________ interface with client applications and direct operations to the appropriate shard or shards. |
| A. | Query Parsers |
| B. | Query Routers |
| C. | Query Executors |
| D. | None of the mentioned |
| Answer» C. Query Executors | |
| 39. |
How many types of sharding exist in MongoDB? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | All of the mentioned |
| Answer» C. 3 | |
| 40. |
To provide high availability and data consistency, in a production sharded cluster, each shard is a ___________ |
| A. | replica set |
| B. | cluster |
| C. | partition |
| D. | all of the mentioned |
| Answer» B. cluster | |
| 41. |
How many components are present in sharded cluster? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |