Point out the wrong statement.

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Question:
Point out the wrong statement.

1.Database servers store the metadata for a sharded cluster

2.Always back up the config database before doing any maintenance on the config server

3. The mongos instances cache metadata and use it to route read and write operations to shards

4.None of the mentioned

Posted Date:-2022-01-26 08:10:40

More MCQS Questions and answers

  1. How many background process runs behind balanced cluster?
  2. Point out the wrong statement.
  3. Point out the wrong statement.
  4. The default value _________ becomes true for all chunk migrations.
  5. The source shard is responsible for incoming ______ operations for the chunk.
  6. Use _______ migration to distribute data during bulk inserts.
  7. __ based partitioning, by contrast, ensures an even distribution of data at the expense of efficient range queries.
  8. _____ can alter the behavior so that the delete phase of the current migration blocks the start of the next chunk migration.
  9. _____ is a background process that keeps chunks from growing too large.
  10. _____ is a string that holds the address of the client, a mongos instance that initiates this change.
  11. _____ servers store the cluster’s metadata.
  12. ______ interface with client applications and direct operations to the appropriate shard or shards.
  13. A _________ key is either an indexed field or an indexed compound field that exists in every document in the collection.
  14. A shard key that increases monotonically will not hinder performance if most of your write operations are ____ operations.
  15. A sharded cluster can contain __________ query router to divide the client request load.
  16. A single sharded cluster must have exclusive use of its _______ servers.
  17. For most deployments, the default value of chunk is _____ megabytes is ideal.
  18. Hashed shard keys use a ________ index of a single field as the shard key to partition data across your sharded cluster.
  19. If the collection is empty then MongoDB will create the index as part of the ________
  20. MongoDB allows administrators to direct the balancing policy using ______ aware sharding.
  21. MongoDB automatically computes the hashes when resolving queries using ______ indexes.
  22. MongoDB generates _______ values upon document creation to produce a unique identifier for the object.
  23. Point out the correct statement.
  24. Point out the correct statement.
  25. Point out the correct statement.
  26. Point out the correct statement.
  27. Point out the correct statement.
  28. Point out the correct statement.
  29. Point out the wrong statement.
  30. Point out the wrong statement.
  31. Production sharded clusters have exactly ______ config servers.
  32. Tags are the primary mechanism to control the behavior of the _______ and the distribution of chunks in a cluster.
  33. The ______ instances are the routers for the cluster.
  34. The _______ collection keeps track of the active components in the sharded cluster.
  35. The ________ collection stores a document for each change to the metadata of a sharded collection.
  36. The _________ collection stores a document for each sharded collection in the cluster.
  37. The _________ process is responsible for redistributing the chunks of a sharded collection evenly among the shards for every sharded collection.
  38. The balancer process sends the _______ command to the source shard.
  39. The index on the shard key cannot be a _________ index.
  40. The mongos provides an interface for applications to interact with sharded clusters that hides the complexity of data ______
  41. The query router uses __________ to target operations to specific shards.
  42. The shards manage _______ migrations as a background operation between an origin shard and a destination shard.
  43. To divide the shard key values into chunks, MongoDB uses _____ based partitioning.
  44. To provide high availability and data consistency, in a production sharded cluster, each shard is a _____
  45. When a chunk grows beyond the chunk size, MongoDB attempts to split the chunk into smaller chunks, always based on ranges in the _____
  46. With __________ enabled, the source shard archives the documents in the migrated chunks in a directory named after the collection namespace.
  47. With hash based partitioning, two documents with _____ shard key values are unlikely to be part of the same chunk.
  48. You can control how many chunks MongoDB will create with the ___________ parameter.
  49. You can return a list of the collections, with the following helper ______
  50. You can set the _________ option on the balancer configuration to set different write concern semantics.
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