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PouchDB Multiple-Choice Questions (MCQs)

PouchDB is an open-source JavaScript database inspired by Apache CouchDB that is designed to run well within the browser.

PouchDB MCQs: This section contains multiple-choice questions and answers on the various topics of PouchDB. Practice these MCQs to test and enhance your skills on PouchDB.

List of PouchDB MCQs

1. PouchDB is written in ____?

1. PHP
2. JavaScript
3. C
4. C++
5. Python

Answer: B) JavaScript

Explanation:

PouchDB is written in JavaScript.

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2. Which of the following format does PouchDB uses to store the data?

1. Document-based
2. Graph-based
3. Column-based
4. Key-value based

Answer: A) Document-based

Explanation:

PouchDB stores data in a document-based format.

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3. Is PouchDB open-source?

1. Yes
2. No

Answer: A) Yes

Explanation:

Yes, PouchDB is open-source.

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4. While the application is offline with PouchDB, the data is saved locally in the browser using ____?

1. WebSQL
2. IndexedDB
3. Both

Answer: C) Both

Explanation:

While the application is offline with PouchDB, the data is saved locally in the browser using WebSQL and IndexedDB.

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5. You can create a database in PouchDB using the ____?

1. PouchDB object
2. PouchDB Tables
3. PouchDB constructor
4. PouchDB field

Answer: C) PouchDB constructor

Explanation:

You can create a database in PouchDB using the PouchDB constructor.

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6. Which of the following method can get the basic information about the database?

1. Info()
2. Db_info()
3. Information()
4. databaseInfo()

Answer: A) Info()

Explanation:

info() method can get the basic information about the database.

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7. Which of the following function may be used to delete a database in PouchDB?

1. Db.delete()
2. Db.remove()
3. Db.del()
4. Db.destroy()

Answer: D) Db.destroy()

Explanation:

PouchDB's db.destroy() function may be used to delete a database.

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8. With the ____ function, you can create a document in PouchDB.

1. db.put()
2. db.create()
3. db.new()

Answer: A) db.put()

Explanation:

With the db.put() function, you can create a document in PouchDB.

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9. With the ____ function, you can create an array (batch) of documents in PouchDB.

1. db.bulkarray()
2. db.bulkDocs()
3. db.arraybulk()

Answer: B) db.bulkDocs()

Explanation:

With the db.bulkDocs() function, you can create an array (batch) of documents in PouchDB.

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10. Which of the following method synchronizes data between multiple databases, either locally or remotely, using two-way replication?

1. Synchronization()
2. Synchro()
3. Sync()
4. Async()

Answer: C) Sync()

Explanation:

Sync() method synchronizes data between multiple databases, either locally or remotely, using two-way replication.

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11. Which of the following method adds an attachment to a database document?

1. Putattachment()
2. Getattachment()
3. Attachment()

Answer: A) Putattachment()

Explanation:

Putattachment() method adds an attachment to a database document.

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12. Which of the following method fetches an attachment from a database document?

1. Putattachment()
2. Getattachment()
3. Attachment()

Answer: B) Getattachment()

Explanation:

Getattachment() method fetches an attachment from a database document.

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13. ____-method allows you to listen in real-time for changes to the database and trigger events depending on those changes.

1. Listen()
2. Changes()
3. Listenchanges()

Answer: B) Changes()

Explanation:

Changes() method allows you to listen in real-time for changes to the database and trigger events depending on those changes.

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14. ____- function returns all documents from the database or a subset of documents based on arguments like startkey, endkey, limit, and so on.

1. Getdocs()
2. Bulkdocs()
3. Alldocs()

Answer: C) Alldocs()

Explanation:

alldocs() function returns all documents from the database or a subset of documents based on arguments like startkey, endkey, limit, and so on.

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15. Which of the following browsers does PouchDB supports?

1. Chrome 30+
2. Safari 5+
3. Internet Explorer 10+
4. Opera 21+
5. All of the above

Answer: E) All of the above

Explanation:

Following databases PouchDB supports:

• Chrome 30+
• Safari 5+
• Internet Explorer 10+
• Opera 21+

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16. The ____ function may be used to minimize the size of a database by deleting unneeded data.

1. compact()
2. Reduce()
3. Min()
4. Minimize()

Answer: A) compact()

Explanation:

The compact() function may be used to minimize the size of a database by deleting unneeded data.

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17. PouchDB functions like an app when offline, storing data locally.

1. True
2. False

Answer: A) True

Explanation:

PouchDB functions like an app when offline, storing data locally.

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18. _rev in PouchDB is known as ____?

1. Revision
2. Revolution
3. Revision maker
4. Revision marker

Answer: D) Revision marker

Explanation:

_rev is known as a revision marker.

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19. With the ____ function, you may delete a document from a PouchDB database.

1. db.remove()
2. db.destroy()
3. db.remove()
4. db.delete()

Answer: A) db.remove()

Explanation:

With the db.remove() function, you may delete a document from a PouchDB database.

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20. What are the alternatives to PouchDB?

1. SQLlite
2. Realm
3. MongoDB
4. All of the above

Answer: D) All of the above

Explanation:

Following are the alternatives to PouchDB:

• SQLlite
• Realm
• MongoDB

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