Node.js Database Connection

What does CRUD stand for in Node.js?

• Create, Read, Upload, Delete

• Copy, Read, Update, Delete

• Create, Remove, Update, Delete

• Create, Read, Update, Delete

How can you connect to a MySQL database in Node.js?

• Use the 'sequelize' package in Node.js to connect to a MySQL database.

• Use the 'mysql' package in Node.js to connect to a MySQL database.

• Use the 'mongodb' package in Node.js to connect to a MySQL database.

• Use the 'express' package in Node.js to connect to a MySQL database.

How can you establish a connection to a MySQL database in Node.js?

• Use the 'mysql' library to create a connection and handle queries

• Modify the database schema file directly to establish a connection

• Use 'mongoose' library instead of 'mysql' for database connection

• Execute SQL queries without establishing a connection

How is Sequelize ORM utilized in Node.js applications?

• Sequelize ORM is primarily used for server-side scripting in Node.js

• Sequelize ORM is a design pattern for organizing code in Node.js applications

• Sequelize ORM is a Node.js module for handling HTTP requests

• Sequelize ORM is a tool for simplifying database interactions in Node.js by providing an object-relational mapping

What are some key features of Sequelize ORM that make it a popular choice for database operations in Node.js?

• Sequelize ORM simplifies database operations by providing model definition, data validation, association handling, and migration support.

• Sequelize ORM is limited in its database compatibility.

• Sequelize ORM is primarily designed for MongoDB databases.

• Sequelize ORM lacks support for data validation.

What are the steps involved in reading data from a MySQL database in Node.js?

• Install the mongodb package using npm

• Execute a query to insert data

• Create a connection to the SQLite database

• The steps involved in reading data from a MySQL database in Node.js are: 1. Install the mysql package using npm. 2. Create a connection to the MySQL database. 3. Execute a query to select data. 4. Handle the result. 5. Close the connection.

How can you update an existing record in a MySQL database using Node.js?

• Use the 'INSERT' query in Node.js with the 'mysql' package to update an existing record in a MySQL database.

• Use the 'DELETE' query in Node.js with the 'mysql' package to update an existing record in a MySQL database.

• Use the 'SELECT' query in Node.js with the 'mysql' package to update an existing record in a MySQL database.

• Use the 'UPDATE' query in Node.js with the 'mysql' package to update an existing record in a MySQL database.

Explain the concept of deleting a record from a MySQL database in Node.js.

• Create a new database table and move the record there instead of deleting it

• Establish a connection to the MySQL database, execute a DELETE query with the appropriate conditions to delete the desired record.

• Use a built-in Node.js function to directly remove the record from the database without executing a query

• Establish a connection to the MySQL database, execute an INSERT query to add a new record with the same data, then delete the original record

What are the common challenges faced when working with database connections in Node.js?

• Synchronous nature of operations, connection pooling, error suppression

• Asynchronous nature of operations, connection pool management, error handling, configuration and security, performance optimization

• Inconsistent API, memory leaks, lack of community support

• Lack of documentation, slow query execution, limited database support

How does Sequelize ORM help in managing database relationships in Node.js?

• Sequelize ORM only supports one-to-one relationships in Node.js.

• Sequelize ORM simplifies defining and managing relationships between database tables in Node.js.

• Sequelize ORM increases the complexity of managing database relationships in Node.js.

• Sequelize ORM does not provide any tools for defining relationships between tables in Node.js.