Node.js, often referred to as simply "Node," is a powerful open-source runtime environment that allows developers to execute JavaScript code outside of web browsers. It is designed for building scalable and efficient network applications, particularly on the server side. Node.js leverages a non-blocking, event-driven architecture, making it ideal for handling asynchronous operations and real-time applications. With its vast ecosystem of packages and modules available through npm (Node Package Manager), Node.js has become a popular choice for web development, microservices, APIs, and more, enabling developers to create high-performance applications with ease.
Show All Answers
Practice Test
41. What is Express.js?
A. A database management system
B. A web application framework for Node.js
C. A front-end development framework
D. An operating system
Show Answer
Report This Question
Answer: A web application framework for Node.js
42. Which core feature of Express.js simplifies the creation of web routes and handling of HTTP requests and responses?
A. Middleware
B. Promises
C. Templates
D. Cookies
Show Answer
Report This Question
Answer: Middleware
43. What is middleware in Express.js?
A. A built-in JavaScript function
B. A component used for database queries
C. A function that handles specific tasks during the request-response cycle
D. A package manager
Show Answer
Report This Question
Answer: A function that handles specific tasks during the request-response cycle
44. Which command is used to install Express.js in a Node.js project?
A. npm add express
B. npm require express
C. npm install express
D. npm express create
Show Answer
Report This Question
Answer: npm install express
45. How does Express.js handle routing for web applications?
A. By using built-in HTML templates
B. By defining routes using HTTP verbs and route handlers
C. By managing database migrations
D. By using a separate routing module
Show Answer
Report This Question
Answer: By defining routes using HTTP verbs and route handlers
46. What is the purpose of the app.use() method in Express.js?
A. To define API routes
B. To create HTML templates
C. To specify middleware functions that should be executed for incoming requests
D. To manage database connections
Show Answer
Report This Question
Answer: To specify middleware functions that should be executed for incoming requests
47. Which template engine is commonly used with Express.js for rendering dynamic views?
A. Handlebars
B. React
C. Vue.js
D. Express-View
Show Answer
Report This Question
Answer: Handlebars
48. In Express.js, what is the purpose of the req and res objects in route handlers?
A. To manage database migrations
B. To define API routes
C. To represent the incoming request and the outgoing response, respectively
D. To create HTML templates
Show Answer
Report This Question
Answer: To represent the incoming request and the outgoing response, respectively
49. What is Express.js commonly used for in web development?
A. Real-time event handling
B. Front-end design
C. Building web applications, RESTful APIs, and server-side applications
D. Database management
Show Answer
Report This Question
Answer: Building web applications, RESTful APIs, and server-side applications
50. What is the primary benefit of using Express.js for web development?
A. It simplifies front-end design.
B. It automatically generates HTML templates.
C. It provides a fast and minimalistic framework for building web applications with Node.js.
D. It includes a built-in database management system.
Show Answer
Report This Question
Answer: It provides a fast and minimalistic framework for building web applications with Node.js.
