MongoDB MCQs (Chapterwise Multiple Choice Questions)

How do you create a new MongoDB user?

Db.createUser({})

Db.insert({user: 1})

Db.customers.newUser({})

Db.newUser({})

Answer & Explanation

Correct Answer: Db.createUser({})

Note: This Question is unanswered, help us to find answer for this one

Which MongoDB shell command deletes a single document?

Db.customers.delete({_id: 1});

Db.customers.drop({_id: 1});

Db.drop.customers({_id: 1});

Db.customers.remove({_id: 1});

Answer & Explanation

Correct Answer: Db.customers.remove({_id: 1});

Note: This Question is unanswered, help us to find answer for this one

Which of the following are considered Core MongoDB operations?

Create, Select, Update, Delete

Create, Read, Update, Drop

Create, Select, Update, Drop

Create, Read, Update, Delete

Answer & Explanation

Correct Answer: Create, Read, Update, Delete

Note: This Question is unanswered, help us to find answer for this one

Which of the following expressions are valid JSON documents?

{Name: Schoolify, url: 'www.schoolifybd.com'}

{Name: "Schoolify", url: www.schoolifybd.com}

{Name: "Schoolify": url: 'www.schoolifybd.com'}

{Name: "Schoolify", url: 'www.schoolifybd.com'}

{Name: "Schoolify". url: 'www.schoolifybd.com'}

Answer & Explanation

Correct Answer: {Name: "Schoolify", url: 'www.schoolifybd.com'}

Note: This Question is unanswered, help us to find answer for this one

A MongoDB instance has at least what three files?

Data, namespace, and journal

Namespace, journal, and log

Journal, data, and database

Data, log, and journal

Answer & Explanation

Correct Answer: Data, namespace, and journal

Note: This Question is unanswered, help us to find answer for this one

To import a CSV file into MongoDB, which command should you issue?

Mongorestore

Mongoi

Upload

Mongoimport

Answer & Explanation

Correct Answer: Mongoimport

Note: This Question is unanswered, help us to find answer for this one

The maximum BSON document size is:

8 megabytes

16 megabytes

4 megabytes

12 megabytes

Answer & Explanation

Correct Answer: 16 megabytes

Note: This Question is unanswered, help us to find answer for this one

Which field is always included in a projection unless specifically excluded?

Index

Name

_id

Row number

Answer & Explanation

Correct Answer: _id

Note: This Question is unanswered, help us to find answer for this one

MongoDB's query language uses operators that start with which character?

:

$

#

@

Answer & Explanation

Correct Answer: $

Note: This Question is unanswered, help us to find answer for this one

Due to their default behavior, Capped Collections are ideal for storing:

Extremely large, unordered lists of documents

Records that require high levels of consistency, e.g. account balances or sales figures

Non-vital, chronological records, like logs

Important records like user accounts or invoices

Answer & Explanation

Correct Answer: Non-vital, chronological records, like logs

Note: This Question is unanswered, help us to find answer for this one

MongoDB Quick Quiz

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