Top MongoDB (Non-SQL) Interview Questions: The Last Part

Today we are going to discuss the top 20 MongoDB Interview Questions. This is Part 4.

Question 16: How do you restore a MongoDB database from a backup?

Answer: To restore a MongoDB database from a backup, you can use the mongorestore command-line tool. Here's an example:

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mongorestore --db mydatabase /path/to/backup/mydatabase

Question 17: How do you connect to a MongoDB database using Node.js?

Answer: To connect to a MongoDB database using Node.js, you can use the official MongoDB Node.js driver. Here’s an example:

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const MongoClient = require('mongodb').MongoClient;

const url = 'mongodb://localhost:27017/mydatabase';
MongoClient.connect(url, (err, client) => {
  // Perform operations
  client.close();
});

Question 18: How do you handle errors in MongoDB operations using Node.js?

Answer: When performing MongoDB operations using Node.js, you can handle errors using try-catch blocks or by using the error parameter in the callback function. Here’s an example:

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db.myCollection.insertOne({ name: 'John' }, (err, result) => {
  if (err) {
    console.error(err);
    return;
  }
  console.log('Document inserted');
});

Question 19: How do you use the MongoDB Atlas cloud database service?

Answer: To use the MongoDB Atlas cloud database service, you need to create an account on the MongoDB Atlas website, set up a cluster, and obtain the connection string. You can then use the connection string in your application to connect to the MongoDB Atlas database.

Question 20: How do you secure a MongoDB database?

Answer: To secure a MongoDB database, you can enable authentication, set up user roles and permissions, enable encryption at rest, and configure network access controls. Additionally, it’s important to regularly apply updates and patches to the MongoDB installation to address any security vulnerabilities.

These MongoDB interview questions, along with the provided code snippets, should help you in preparing for your MongoDB interview. Remember to dive deeper into each topic and explore the MongoDB documentation for a comprehensive understanding of MongoDB and its usage in application development.

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