250+ Node Js MCQ With Online Practice Test

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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.

101. What is routing in the context of Node.js web applications?

Answer: Defining the path and handling of HTTP requests based on the requested URL

102. In Express.js, how is routing typically defined for handling HTTP requests?

Answer: Using the app.route method

103. What is a route parameter in Express.js routing?

Answer: A placeholder in a route URL that can capture values from the URL and make them available to the route handler

104. In Express.js routing, how do you define a route parameter in a route URL pattern?

Answer: By enclosing it in curly braces {}

105. What HTTP verb is typically used for retrieving data from the server in Express.js routing?

Answer: GET

106. What is the purpose of the app.get() method in Express.js routing?

Answer: To define a new route for retrieving data using the GET HTTP verb

107. In Express.js routing, what is the purpose of the req and res objects in a route handler function?

Answer: To represent the incoming request and the outgoing response, respectively

108. What is the primary benefit of using route parameters in Express.js routing?

Answer: They allow for dynamic routing based on values captured from the URL.

109. What is a route handler function in Express.js routing?

Answer: A function responsible for processing an HTTP request and generating an HTTP response for a specific route

110. In Express.js, what is the purpose of the app.use() method when defining middleware for routing?

Answer: To specify route handlers for all routes
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