Building an advanced backend API from scratch using Node.js; CRUD, authentication and implementing awesome features— part 1 Quiz

Explore the essential steps to set up a modern backend API for blogging using Node.js, including CRUD operations, authentication, and foundational project structure. Learn the key concepts needed for building robust server-side applications.

1. Project Initialization and Prerequisites

   Which combination of tools is most appropriate to install and set up before starting backend API development with Node.js and MongoDB?

   1. Python, Docker, SQLite, Eclipse
   2. Node.js, Postman, VSCode, MongoDB Atlas
   3. Ruby, MongoDB Compass, Atom, Redis
   4. Java, Firebase CLI, NetBeans, PostgreSQL

   Explanation: Node.js is required as the runtime environment, Postman helps test APIs, VSCode is a popular code editor, and MongoDB Atlas provides a managed database. The other options mention tools that are unrelated or not optimal for a Node.js + MongoDB stack (e.g., Python, Java, Redis, Firebase CLI).

2. Express.js Role in the Project

   Why is Express.js favored when building RESTful APIs using Node.js?

   1. It is a type of NoSQL database compatible with Node.js.
   2. It replaces the need for a code editor during development.
   3. It simplifies routing and middleware management for server APIs.
   4. It provides a built-in templating engine for rendering web pages.

   Explanation: Express.js is widely used because it streamlines routing and middleware tasks in API development. It does not include a built-in templating engine by default, cannot replace a code editor, and is not a type of database.

3. Typical Authentication Flow

   In a backend API for a blogging platform, what happens when a user tries to create a new post while not logged in?

   1. The API automatically creates a guest account for them.
   2. They can create posts, but cannot edit or delete them.
   3. They receive an authentication error and cannot create the post.
   4. Their request is forwarded to an external microservice.

   Explanation: Users must be authenticated to create new posts, so unauthenticated attempts should result in an error. The system does not auto-create guest accounts, offload requests, or permit unauthenticated post creation.

4. Database Schema Responsibilities

   What is the main purpose of defining database schemas using tools like Mongoose in a backend API project?

   1. To configure server port numbers for the API.
   2. To structure and validate the format of data stored in the database.
   3. To generate and serve static files for the frontend.
   4. To manage the connection between the client and external APIs.

   Explanation: Mongoose schemas ensure data is well-structured and validated before it is stored in the database. They do not handle server configuration, client connections, or frontend static files.

5. CRUD Operations Access

   Which CRUD operations can be performed by any user, regardless of authentication, on a typical blogging API?

   1. Viewing all posts and user profiles
   2. Editing and deleting any post
   3. Creating a new post
   4. Following and unfollowing users

   Explanation: Anyone can view public posts and user profiles without authentication. Creating, editing, deleting posts, and following users typically require the user to be logged in for security and accountability.