MongoDB C100DBA Exam (page: 5)
MongoDB Certified DBA Associate Exam
Updated on: 25-Dec-2025

Viewing Page 5 of 28

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



Viewing Page 5 of 28



Share your comments for MongoDB C100DBA exam with other users:

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Anonymous


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Anonymous


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Anonymous


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Anonymous


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question #3 refers to vnet4 and vnet5. however, there is no vnet5 listed in the case study (testlet 2).
UNITED STATES


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GERMANY


Sumita Bose 7/21/2023 1:01:00 AM

qs 4 answer seems wrong- please check
AUSTRALIA


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very detailed explanation !
HONG KONG


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the interactive nature of the test engine application makes the preparation process less boring.
NETHERLANDS


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Anonymous


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Anonymous


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Anorag 9/6/2023 9:24:00 AM

i just wrote this exam and it is still valid. the questions are exactly the same but there are about 4 or 5 questions that are answered incorrectly. so watch out for those. best of luck with your exam.
CANADA


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passed my exam today. this is a good start to 2023.
UNITED STATES


1 10/28/2023 7:32:00 AM

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Anonymous


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becoming interesting on the logical part of the cdbs and pdbs
Anonymous


LOL what a joke 9/10/2023 9:09:00 AM

some of the answers are incorrect, i would be wary of using this until an admin goes back and reviews all the answers
UNITED STATES


Muhammad Rawish Siddiqui 12/9/2023 7:40:00 AM

question # 267: federated operating model is also correct.
SAUDI ARABIA