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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 5 of 10

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Q41.
________ indexes expire documents after the specified number of seconds has passed since the indexed field value.

a.

Hashed

b.

Unique

c.

Multikey

d.

TTL

Discuss
Answer: (d).TTL
Q42.
Point out the correct statement.

a.

If you build a TTL index in the foreground, MongoDB does not remove expired documents as soon as the index finishes building

b.

The TTL index does guarantee that expired data will be deleted immediately upon expiration

c.

Duration of the removal operation depends on the workload of your mongod instance

d.

None of the mentioned

Discuss
Answer: (c).Duration of the removal operation depends on the workload of your mongod instance
Q43.
The background task that removes expired documents runs every ________ seconds.

a.

15

b.

45

c.

60

d.

120

Discuss
Answer: (c).60
Q44.
Point out the wrong statement.

a.

The unique constraint applies to separate documents in the collection

b.

Unique index prevents separate documents from having the same value for the indexed key

c.

Index does prevent a document from having multiple elements or embedded documents in an indexed array from having the same value

d.

None of the mentioned

Discuss
Answer: (c).Index does prevent a document from having multiple elements or embedded documents in an indexed array from having the same value
Q45.
On replica sets, the TTL background thread only deletes documents on _____________

a.

primary

b.

secondary

c.

upadte

d.

none of the mentioned

Discuss
Answer: (a).primary
Q46.
You can combine the ________ constraint with the sparse index to filter these null values from the unique index and avoid the error.

a.

Hashed

b.

Unique

c.

Sparse

d.

Compound

Discuss
Answer: (c).Sparse
Q47.
You may not specify a unique constraint on a ______ index.

a.

Hashed

b.

Unique

c.

Sparse

d.

Compound

Discuss
Answer: (a).Hashed
Q48.
Which of the following indexes are always sparse?

a.

2dsphere

b.

2d

c.

geoHaystack

d.

all of the mentioned

Discuss
Answer: (d).all of the mentioned
Q49.
To modify an existing index, you cannot just re-issue the _________ method with the updated specification of the index.

a.

dropIndex()

b.

modIndex()

c.

createIndex()

d.

none of the mentioned

Discuss
Answer: (c).createIndex()
Q50.
Point out the wrong statement.

a.

To modify an existing index, you need to drop and recreate the index

b.

Your client library may have a different or additional interface for this operation

c.

To see the status of an indexing process, you can use the db.statusOp() method in the mongo shell

d.

None of the mentioned

Discuss
Answer: (c).To see the status of an indexing process, you can use the db.statusOp() method in the mongo shell
Page 5 of 10

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