MongoDB MCQ

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• ________ command verifies that a process is a mongos.
  ক

  medianKey

  খ

  isdbgrid

  গ

  movePrimary

  ঘ

  none of the mentioned
• _________ is an internal command that supports the sharding functionality.
  ক

  getBalancerHost()

  খ

  getShardMap

  গ

  enableSharding()

  ঘ

  all of the mentioned
• You can only issue listShards against the ________ database.
  ক

  local

  খ

  admin

  গ

  temp

  ঘ

  none of the mentioned
• Which of the following command is used to determine split points?
  ক

  splitVector

  খ

  medianKey

  গ

  movePrimary

  ঘ

  none of the mentioned
• Which of the following command that validates index on shard key?
  ক

  checkShardingIndex

  খ

  checkSIndex

  গ

  enableSharding

  ঘ

  all of the mentioned
• _______ forces an update to the cluster metadata cached by a mongos.
  ক

  config

  খ

  flushconf

  গ

  flushRouterConfig

  ঘ

  all of the mentioned
• _________ waits for a change in ping state from one of the mongos in the sharded cluster.
  ক

  sh.waitForBalancer()

  খ

  sh.startBalancer()

  গ

  sh.waitForPingChange()

  ঘ

  all of the mentioned
• _______ enables the balancer and waits for balancing to start.
  ক

  sh.waitForBalancer()

  খ

  sh.startBalancer()

  গ

  sh.waitForDLock()

  ঘ

  all of the mentioned
• ________ returns a boolean to report if the balancer is currently enabled.
  ক

  sh.getBalancerHost()

  খ

  sh.enableBalancing()

  গ

  sh.getBalancerState()

  ঘ

  none of the mentioned
• _______ activates the sharded collection balancer process if previously disabled using sh.disableBalancing().
  ক

  sh.getBalancerHost()

  খ

  sh.enableBalancing()

  গ

  sh.enableSharding()

  ঘ

  all of the mentioned
• _________ disable balancing on a single collection in a sharded database.
  ক

  sh.removeTagRange()

  খ

  sh._checkMongos()

  গ

  sh.disableBalancing()

  ঘ

  none of the mentioned
• _________ removes an association between a range shard keys and a shard tag.
  ক

  sh.removeTagRange()

  খ

  sh._checkMongos()

  গ

  sh.disableBalancing()

  ঘ

  none of the mentioned
• _________ reports on the last chunk migration.
  ক

  sh._checkMongos()

  খ

  sh.addShard()

  গ

  sh._lastMigration()

  ঘ

  all of the mentioned
• _______ reports on the active balancer lock, if it exists.
  ক

  sh._checkFullName()

  খ

  sh._adminCommand()

  গ

  sh.getBalancerLockDetails()

  ঘ

  all of the mentioned
• ________ tests to see if the mongo shell is connected to a mongos instance.
  ক

  sh._checkMongos()

  খ

  sh.addShard()

  গ

  sh._lastMigration()

  ঘ

  all of the mentioned
• _______ runs a database command against the admin database of a mongos instance.
  ক

  sh._checkFullName()

  খ

  sh._adminCommand()

  গ

  sh.getBalancerLockDetails()

  ঘ

  all of the mentioned
• Which of the following parameter denotes name of the shard from which to remove a tag?
  ক

  shard

  খ

  tag

  গ

  chunk

  ঘ

  none of the mentioned
• Use ________ to ensure that the balancer migrates documents that exist within the specified range to a specific shard.
  ক

  sh.addShardTag()

  খ

  sh.addTag()

  গ

  sh.aShardTag()

  ঘ

  all of the mentioned
• Which of the following parameter represents minimum value of the shard key range to include in the tag?
  ক

  min

  খ

  max

  গ

  maximum

  ঘ

  minimum
• Each document in the tags holds the ________ of the sharded collection and a minimum shard key value.
  ক

  tag

  খ

  chunk

  গ

  namespace

  ঘ

  size
• To assign a tag to a range of shard keys use the _________ method when connected to a mongos instance.
  ক

  sh.addTagRange()

  খ

  sh.splitFind()

  গ

  sh.Range()

  ঘ

  all of the mentioned
• ________ associates a shard with a tag or identifier.
  ক

  sh.collects()

  খ

  sh.addShardTag

  গ

  sh.results()

  ঘ

  all of the mentioned
• _________ is used to remove tags from a particular shard.
  ক

  sh.removeTag()

  খ

  sh.removeShard()

  গ

  sh.removeShardTag()

  ঘ

  all of the mentioned
• The preferred way to clear the _________ flag from a chunk is to attempt to split the chunk.
  ক

  boolean

  খ

  jumbo

  গ

  change

  ঘ

  all of the mentioned
• The chunkSize and ________ options, passed at startup to the mongos, do not affect the chunk size after you have initialized the cluster.
  ক

  –Size

  খ

  –chunkSize

  গ

  –chunk

  ঘ

  None of the mentioned
• The mergeChunks command requires at least _______ empty input chunk.
  ক

  one

  খ

  two

  গ

  three

  ঘ

  all of the mentioned
• sh.splitFind () Splits the chunk that contains the shard key value specified by the query at the chunk’s ______ point.
  ক

  smean

  খ

  stdev

  গ

  median

  ঘ

  all of the mentioned
• _________ splits a chunk at the shard key value specified by the query.
  ক

  sh.Find()

  খ

  sh.splitFind()

  গ

  sh.split()

  ঘ

  sh.splitAt
• __________ splits the chunk that contains the shard key value specified by the query at the chunk’s median point.
  ক

  sh.Find()

  খ

  sh.splitFind()

  গ

  sh.split()

  ঘ

  all of the mentioned
• Use ________ to determine the current chunk ranges across the cluster.
  ক

  sh.collects()

  খ

  sh.status()

  গ

  sh.results()

  ঘ

  all of the mentioned