Backend (Node.js, Express.js, MongoDB)

What is one of the main advantages of using Express?

• It replaces JavaScript with a new programming language

• It is a slow and complex framework

• It provides a lightweight layer on top of Node.js for building web applications

• It only works with databases and not with APIs

Which of the following is NOT an HTTP Request Method?

• GET

• BODY

• POST

• DELETE

What is the primary purpose of HTTP headers?

• To replace the body of an HTTP request or response

• To carry additional information between the client and server

• To store large amounts of user data permanently

• To carry request parameters between the client and server

What is the primary role of a model in an application?

• To define the user interface and display data

• To control user input and manage application logic

• To replace the need for controllers in an application

• To handle data management and interactions with databases or APIs

Why is the enctype="multipart/form-data" attribute required in the form when uploading files?

• It allows the server to receive file uploads along with other form data

• It ensures that the form data is sent as plain text

• It compresses the file before sending it to the server

• It prevents the form from submitting without JavaScript

What is the purpose of Multer in a Node.js application?

• To serve static files like HTML and CSS

• To manage database connections

• To validate user authentication

• To handle multipart/form-data for file uploads

Which of the following is true about JSON Web Token (JWT) authentication?

• JWT tokens must be stored in the database.

• JWT allows authentication without storing user credentials on the server.

• JWT is a stateful authentication mechanism.

• JWT tokens are automatically encrypted.

What is the primary difference between authentication and authorization?

• Authentication verifies the user’s identity, while authorization determines what they can access.

• Authentication checks user permissions, while authorization validates passwords.

• Authentication is required only for administrators, while authorization applies to all users.

• Authentication and authorization are the same process.

Which method is used to retrieve all documents from a Mongoose model?

• findAll()

• find()

• fetchAll()

• getAll()

What does CRUD stand for in database operations?

• Connect, Retrieve, Update, Deploy

• Cache, Restore, Utilize, Destroy

• Create, Read, Update, Delete

• Compute, Reduce, Upload, Download