Node Js Basic Interview Questions
Essential Node.js Interview Questions for Entry-Level Candidates
Node Js Basic Interview Questions
Node.js is a popular runtime environment for building scalable network applications. It is useful for developing real-time applications, web servers, and data streaming services due to its non-blocking, event-driven architecture. Basic interview questions often cover concepts such as event loop, modules, async programming, and the Node.js package ecosystem. Familiarity with these concepts is essential to understand the fundamentals of Node.js development and its key advantages in building efficient and scalable applications.
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1 - What is Node.js? A JavaScript runtime environment that allows you to build server side applications using JavaScript.
2) Why use Node.js? Event driven, non blocking architecture for high concurrency and scalability.
3) What is the main module in Node.js? The ‘exports’ module.
4) What is a callback in Node.js? A function passed as an argument to another function to be executed after a task is completed.
5) What is the difference between a synchronous and asynchronous function in Node.js? Synchronous functions block the execution of the Node.js event loop, while asynchronous functions do not.
6) What is the event loop in Node.js? A core component that listens for events and executes registered callbacks.
7) What is a stream in Node.js? An object that emits data events.
8) What is the purpose of the buffer class in Node.js? To represent binary data in memory.
9) What is the difference between a module and a library in Node.js? A module is a code snippet that can be reused in multiple applications, while a library is a collection of modules.
10) What is package.json in Node.js? A file that contains metadata about the project, including dependencies and scripts.
11 - What is the npm command in Node.js used for? Managing Node.js packages.
12) What is the purpose of a middleware in Node.js? To process incoming requests and outgoing responses in an application.
13) What is the difference between GET and POST requests in HTTP? GET requests retrieve data from a server, while POST requests submit data to a server.
14) What is the status code 404 in HTTP? Not Found.
15) What is the purpose of the ‘async/await’ syntax in Node.js? To make asynchronous code look synchronous, making it easier to read and write.
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- Course Overview
- This course covers the fundamental interview questions for Node.js developers at various experience levels. It provides comprehensive explanations, code snippets, and real-world examples to help candidates prepare effectively for technical interviews.
- Course Description
- Master the essential Node.js interview questions and prepare to ace your next job interview. This course covers core Node.js concepts, including modules, event loop, asynchronous programming, error handling, and testing.
- Key Features
- 1 - Comprehensive Tool Coverage: Provides hands-on training with a range of industry-standard testing tools, including Selenium, JIRA, LoadRunner, and TestRail.
- 2) Practical Exercises: Features real-world exercises and case studies to apply tools in various testing scenarios.
- 3) Interactive Learning: Includes interactive sessions with industry experts for personalized feedback and guidance.
- 4) Detailed Tutorials: Offers extensive tutorials and documentation on tool functionalities and best practices.
- 5) Advanced Techniques: Covers both fundamental and advanced techniques for using testing tools effectively.
- 6) Data Visualization: Integrates tools for visualizing test metrics and results, enhancing data interpretation and decision-making.
- 7) Tool Integration: Teaches how to integrate testing tools into the software development lifecycle for streamlined workflows.
- 8) Project-Based Learning: Focuses on project-based learning to build practical skills and create a portfolio of completed tasks.
- 9) Career Support: Provides resources and support for applying learned skills to real-world job scenarios, including resume building and interview preparation.
- 10) Up-to-Date Content: Ensures that course materials reflect the latest industry standards and tool updates.
Benefits of taking our course
Functional Tools
1 - Node.js: A JavaScript runtime environment that allows developers to execute JavaScript code on the server side.
2) Express.js: A web application framework for Node.js that simplifies the process of creating web applications.
3) MongoDB: A NoSQL database management system that stores data in JSON like documents.
4) React.js: A JavaScript library for building user interfaces.
5) Redux: A state management library for React.js applications.
6) Git: A distributed version control system that allows developers to track changes to code over time.
7) npm: A package manager for Node.js that allows developers to install and manage third party modules.
8) Heroku: A cloud platform that allows developers to deploy and manage web applications.
9) Docker: A containerization platform that allows developers to package and distribute applications in a consistent and reproducible way.
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