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Welcome to the Indexes In MongoDB MCQs Page

Dive deep into the fascinating world of Indexes In MongoDB with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Indexes In MongoDB, a crucial aspect of MongoDB. In this section, you will encounter a diverse range of MCQs that cover various aspects of Indexes In 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 Indexes In 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 Indexes In MongoDB. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Indexes In MongoDB MCQs | Page 9 of 10

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Q81.
Sort operations that do not use an index will abort when they use _______ megabytes of memory.

a.

16

b.

32

c.

64

d.

All of the mentioned

Discuss
Answer: (b).32
Q82.
Point out the correct statement.

a.

If you only ever query on a single key in a given collection, then you need to create just multikey index for that collection

b.

If you sometimes query on only one key and at other times query on that key combined with a second key, then creating a compound index is more efficient than creating a single-key index

c.

The choice between creating compound indexes that support your queries or relying on index intersection is independent of specifics of your system

d.

None of the mentioned

Discuss
Answer: (b).If you sometimes query on only one key and at other times query on that key combined with a second key, then creating a compound index is more efficient than creating a single-key index
Q83.
An index can support sort operations on a non-prefix subset of the index key pattern using _________ condition.

a.

predicate

b.

selection

c.

equality

d.

none of the mentioned

Discuss
Answer: (c).equality
Q84.
__________ method provides a wrapper around the totalIndexSize output of the collStats (i.e. db.collection.stats()) operation.

a.

db.collection.totalallIndexSize()

b.

db.collection.totalIndexSizeAll()

c.

db.collection.totalIndexSize()

d.

all of the mentioned

Discuss
Answer: (c).db.collection.totalIndexSize()
Q85.
Indexes do not have to fit entirely into ______ in all cases.

a.

ROM

b.

RAM

c.

Secondary Storage

d.

None of the mentioned

Discuss
Answer: (a).ROM
Q86.
________ is the ability of a query to narrow results using the index.

a.

Causality

b.

Cardinality

c.

Selectivity

d.

All of the mentioned

Discuss
Answer: (b).Cardinality
Q87.
__________ query calculates distances using flat (planar) geometry.

a.

$center

b.

$centre

c.

$radii

d.

Sort

Discuss
Answer: (a).$center
Q88.
Point out the wrong statement.

a.

The query scans the index and not the collection

b.

If overall selectivity is high, and if MongoDB must read a number of documents to return results, then some queries may perform faster without indexes

c.

A better strategy, depending on your queries, would be to create a compound index that includes the high-selectivity field and another field

d.

None of the mentioned

Discuss
Answer: (b).If overall selectivity is high, and if MongoDB must read a number of documents to return results, then some queries may perform faster without indexes
Q89.
_________ defines a circle for a geospatial query that uses spherical geometry.

a.

$center

b.

$centre

c.

$radii

d.

$centersphere

Discuss
Answer: (d).$centersphere
Q90.
When used with the $box operator, _________ returns documents based on grid coordinates and does not query for GeoJSON shapes.

a.

$geoNear

b.

$geoWithin

c.

$geoRear

d.

All of the mentioned

Discuss
Answer: (b).$geoWithin
Page 9 of 10

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