MongoDB C100DBA Exam (page: 2)
MongoDB Certified DBA Associate Exam
Updated on: 25-Dec-2025

Viewing Page 2 of 28

The MongoDB explain() method does not support which of the following verbosity mode:

  1. executionStats
  2. queryPlanner
  3. customExecutionStats
  4. allPlansExecution

Answer(s): A



Consider a collection posts which has fields: Jd, post_text, post_author, post_timestamp, post_tags etc. Which of the following query retrieves ONLY the key named post_text from the first document retrieved?

  1. db.posts.finOne({},{_id:0, post_text:1})
  2. db.posts.findOne({post_text: 1})
  3. db.posts.find({},{_id:Of post_text:1})
  4. db.posts.finOne«},{post_text:l})

Answer(s): A



In a sharded replica set environment, the w Option provides ability for write concern and j Option provides ability for the data to be written on disk journal. Consider that we have a seven member replica set and we want to assure that the writes are committed to journal.
What should be the value of j?

  1. 1
  2. 2
  3. 0
  4. 7

Answer(s): B



Aggregation Pipelines have a limit of:

  1. 2 MB document and 100 MB RAM
  2. 16 MB document and 100 MB RAM
  3. No limit on document and 100 MB RAM
  4. 2 MB document and no limit on RAM

Answer(s): B



What is the maximum size of a MongoDB document?

  1. 2 MB
  2. 12 MB
  3. There is no maximum size. It depends on the RAM.
  4. 16 MB

Answer(s): D



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