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Welcome to the Optimization Strategies for MongoDB MCQs Page

Dive deep into the fascinating world of Optimization Strategies for MongoDB with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Optimization Strategies for MongoDB, a crucial aspect of MongoDB. In this section, you will encounter a diverse range of MCQs that cover various aspects of Optimization Strategies for MongoDB, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within MongoDB.

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Check out the MCQs below to embark on an enriching journey through Optimization Strategies for MongoDB. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of MongoDB.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Optimization Strategies for MongoDB. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Optimization Strategies for MongoDB MCQs | Page 7 of 8

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Q61.
You can inspect __________ to check the amount of mapped memory that mongod is using.

a.

mem.mapped

b.

memory.resident

c.

mem.resident

d.

all of the mentioned

Discuss
Answer: (a).mem.mapped
Q62.
MongoDB reports its triggered page faults as the total number of page faults in ________ second.

a.

1

b.

100

c.

1000

d.

None of the mentioned

Discuss
Answer: (a).1
Q63.
Which of the operator is used to access the query field of documents within system.profile?

a.

$select

b.

$retrieve

c.

$query

d.

None of the mentioned

Discuss
Answer: (c).$query
Q64.
____________ returns information on the query plan for aggregate function.

a.

Reporter

b.

db.collection.explain()

c.

db.collection.explainplan()

d.

None of the mentioned

Discuss
Answer: (b).db.collection.explain()
Q65.
By default, db.collection.explain() runs in ___________ verbosity mode.

a.

VerbosityMode

b.

queryPlanner

c.

executeStats

d.

none of the mentioned

Discuss
Answer: (b).queryPlanner
Q66.
____________ does not provide query execution information for the rejected plans.

a.

serverstats

b.

queryPlanner

c.

executionStats

d.

all of the mentioned

Discuss
Answer: (c).executionStats
Q67.
Which of the following provides information on the MongoDB instance?

a.

serverInfo

b.

queryPlanner

c.

executeStats

d.

none of the mentioned

Discuss
Answer: (a).serverInfo
Q68.
_________ corresponds to the millis field returned by cursor.explain() in earlier versions of MongoDB.

a.

executionMillis

b.

executionTimeMillis

c.

timemillis

d.

all of the mentioned

Discuss
Answer: (b).executionTimeMillis
Q69.
For sharded collections, explain returns the __________ for each accessed shard.

a.

clientInfo

b.

serverInfo

c.

serverplan

d.

all of the mentioned

Discuss
Answer: (b).serverInfo
Q70.
Point out the wrong statement.

a.

If MongoDB can use an index scan to obtain the requested sort order, the result will not include a SORT stage

b.

In previous versions of MongoDB, cursor.explain() returned the scanAndOrder field to specify whether MongoDB could use the index order to return sorted results

c.

If MongoDB uses indexes for a $and expression, the result will include the AND stage with an inputStages array that details the replicata sets

d.

None of the mentioned

Discuss
Answer: (a).If MongoDB can use an index scan to obtain the requested sort order, the result will not include a SORT stage
Page 7 of 8

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