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Welcome to the MongoDB CRUD Operations MCQs Page

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

MongoDB CRUD Operations MCQs | Page 5 of 8

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Q41.
The order of documents returned by a query is not defined unless you specify a ______

a.

sortfind()

b.

sortelse()

c.

sort()

d.

none of the mentioned

Discuss
Answer: (c).sort()
Q42.
Point out the correct statement.

a.

Queries specify criteria, or conditions, that identify the documents that MongoDB returns to the clients

b.

Write operations, or queries, retrieve data stored in the database

c.

The selection limits the amount of data that MongoDB returns to the client over the network

d.

All of the mentioned

Discuss
Answer: (a).Queries specify criteria, or conditions, that identify the documents that MongoDB returns to the clients
Q43.
In aggregation pipeline, the _______ pipeline stage provides access to MongoDB queries.

a.

$catch

b.

$match

c.

$batch

d.

All of the mentioned

Discuss
Answer: (b).$match
Q44.
Which of the following method returns one document?

a.

findOne()

b.

findOne1()

c.

selectOne()

d.

all of the mentioned

Discuss
Answer: (a).findOne()
Q45.
Point out the wrong statement.

a.

sort() modifier sorts the results by age in ascending order

b.

Queries in MongoDB return all fields in all matching documents by default

c.

To scale the amount of data that MongoDB sends to applications, include a projection in the queries.

d.

None of the mentioned

Discuss
Answer: (c).To scale the amount of data that MongoDB sends to applications, include a projection in the queries.
Q46.
Which of the following is the second argument to projection?

a.

findOne()

b.

findOne1()

c.

selectOne()

d.

find()

Discuss
Answer: (d).find()
Q47.
Which of the following query selects documents in the records collection that match the condition { “user_id”: { $lt: 42 } }?

a.

db.records.findOne( { “user_id”: { $lt: 42 } }, { “history”: 0 } )

b.

db.records.find( { “user_id”: { $lt: 42 } }, { “history”: 0 } )

c.

db.records.findOne( { “user_id”: { $lt: 42 } }, { “history”: 1 } )

d.

db.records.select( { “user_id”: { $lt: 42 } }, { “history”: 0 } )

Discuss
Answer: (b).db.records.find( { “user_id”: { $lt: 42 } }, { “history”: 0 } )
Q48.
Which of the following functionality is used for aggregation framework?

a.

$match

b.

$project

c.

$projectmatch

d.

All of the mentioned

Discuss
Answer: (b).$project
Q49.
To suppress the _id field from the result set, specify _________ in the projection document.

a.

_id: 1

b.

_id: 0

c.

_id: it

d.

None of the mentioned

Discuss
Answer: (b)._id: 0
Q50.
Which of the following is not a projection operator?

a.

$slice

b.

$elemMatch

c.

$

d.

None of the mentioned

Discuss
Answer: (d).None of the mentioned
Page 5 of 8

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