MongoDB Associate Database Administrator C100DBA Dumps in PDF

Free MongoDB C100DBA Real Questions (page: 12)

What is the replication factor for a replicated cluster with 1 primary, 3 secondaries with one of them hidden. The set also has an arbiter?

  1. None of the above
  2. 5
  3. 3
  4. 4

Answer(s): D



Which operations add new documents to a collection?

  1. Create
  2. update
  3. insert
  4. delete

Answer(s): A,C



Consider that you have a collection called population which has fields state and city. Which of the following query will calculate the population grouped by state and city?

  1. db.population.aggregate( [{ $group: { _id: { state: "$state", city; "$city" },pop: { $sum: 1 > > >] )
  2. db.population.aggregate( [{ $group: { _id: { state: Estate", city: "$city" },pop: { $pop: 1 } } }] )
  3. db.population.aggregate( [{ $group: { _id: { state: Estate", city: n$city" },pop: { $sum:
    "$pop" } } }] )
  4. db.population.aggregate( [{ $group: { _id: { city: "$city" },pop: { $sum: "$pop" } } }] )Multi Document Transaction is not supported by MongoDB

Answer(s): C



Which of the following is true about sharding?

  1. Creating a sharded key automatically creates an index on the collection using that key
  2. We cannot change a shard key directly/automatically once it is set up
  3. A sharded environment does not support sorting functionality since the documents lie on various mongod instances
  4. Sharding is enabled at the database level

Answer(s): B



Which of the tags in a replica set configuration specify the operations to be read from the node with the least network latency?

  1. netLatency
  2. secondaryPreferred
  3. nearest
  4. primaryPreferred

Answer(s): C



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22. if you need to make sure that one computer in your hot-spot network can access the internet without hot-spot authentication, which menu allows you to do this? answer is ip binding and not wall garden. wall garden allows specified websites to be accessed with users authentication to the hotspot

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