FAQs on MongoDB Tutorial for Beginners 4 - Create Collection and Drop Collection

Question 1

1. What is MongoDB?

Accepted Answer

Ans. MongoDB is a popular NoSQL database management system that stores and manages data in a document-oriented format. It is known for its flexibility, scalability, and high performance.

Question 2

2. How do you create a collection in MongoDB?

Accepted Answer

Ans. To create a collection in MongoDB, you can use the `db.createCollection()` method. For example, to create a collection named 'users', you can run the following command:```db.createCollection('users')```This will create an empty collection called 'users' in the current database.

Question 3

3. How do you drop a collection in MongoDB?

Accepted Answer

Ans. To drop a collection in MongoDB, you can use the `db.collection.drop()` method. For example, to drop the 'users' collection, you can run the following command:```db.users.drop()```This will permanently delete the 'users' collection and all its data from the database.

Question 4

4. Can you recover a dropped collection in MongoDB?

Accepted Answer

Ans. No, once a collection is dropped in MongoDB, it cannot be recovered. Dropping a collection permanently deletes it from the database, including all its data. It is important to have proper backups in place to prevent data loss.

Question 5

5. How can you check if a collection exists in MongoDB?

Accepted Answer

Ans. To check if a collection exists in MongoDB, you can use the `db.getCollectionNames()` method and check if the desired collection name is present in the returned array. For example, to check if the 'users' collection exists, you can run the following command:```db.getCollectionNames().includes('users')```This will return `true` if the 'users' collection exists and `false` otherwise.

MongoDB Tutorial for Beginners 4 - Create Collection and Drop Collection

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