MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) (C100DBA) Practice Test

Questions # 11:

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

Options:

executionStats

queryPlanner

customExecutionStats

allPlansExecution

Questions # 12:

Which of the following node is used during election in a replication cluster?

Options:

primary

arbiter

hidden

secondary

Questions # 13:

Aggregation Pipelines have a limit of:

Options:

2 MB document and 100 MB RAM

16 MB document and 100 MB RAM

No limit on document and 100 MB RAM

2 MB document and no limit on RAM

Questions # 14:

Which command can be used to rebuild the indexes on a collection in MongoDB?

Options:

db.collection.createlndex({relndex:l})

db.collection.reIndex({author:l})

db.collection.relndexQ

db.collection.createIndex({author:l}).reIndex()

Questions # 15:

Which of the following does MongoDB use to provide High Scalability?

Options:

Replication

Write Concern

Indexing

Sharding

Questions # 16:

When should we consider representing a one-to-many relationship in an embedded collection instead of separate collection?

Options:

When the many is not very large

When the many is very large

Always

Never

Questions # 17:

Which mongodb tool is used to report details on number of database operations in MongoDB?

Options:

mongostat

mongotop

mongorestore

mongodump

Questions # 18:

In what format does mongodump creates backup files?

Options:

BSON

JSON

SOAP

XML

Questions # 19:

Given a replica set with five data-bearing members, suppose the primary goes down with operations in its oplog that have been copied from the primary to only one secondary. Assuming no other problems occur, which of the following describes what is most likely to happen?

Options:

missing operations will need to be manually re-performed

the secondary with the most current oplog will be elected primary

reads will be stale until the primary comes back up

the primary may roll back the operations once it recovers

the most current secondary will roll back the operations following the election

Questions # 20:

Below is a sample document of "orders" collection

Question # 20

Options:

$sort

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