Basic Node Js Interview Questions

Basic Node Js Interview Questions

Essential Node.js Interview Questions for Beginners

Basic Node Js Interview Questions

Basic Node.js interview questions assess fundamental concepts crucial for web development using this JavaScript runtime environment. These questions cover topics such as event-driven programming, asynchronous operations, module management, error handling, and working with the file system. Mastery of these concepts is essential for building scalable, high-performing, and maintainable Node.js applications.

To Download Our Brochure: https://www.justacademy.co/download-brochure-for-free

Message us for more information: +91 9987184296

1 - What is Node.js?

Node.js is a cross platform, open source JavaScript runtime environment that executes JavaScript code outside of a web browser.

2) What are the key features of Node.js?

Non blocking I/O, event driven architecture, single threaded event loop, and a vast ecosystem of open source modules.

3) What is the Event Loop in Node.js?

The event loop is a core mechanism in Node.js that manages the execution of asynchronous tasks. It constantly checks for events that have been triggered and executes the appropriate callbacks.

4) What is the difference between synchronous and asynchronous code in Node.js?

Synchronous code executes sequentially, blocking the event loop, while asynchronous code allows other tasks to execute while waiting for the current task to complete.

5) What is a module in Node.js?

Modules are reusable blocks of code that can be imported into other Node.js programs.

6) What is the purpose of the package.json file?

The package.json file contains metadata about the Node.js project, including its dependencies, scripts, and other configuration settings.

7) What is Express.js?

Express.js is a popular web application framework for Node.js that simplifies the creation of web servers and APIs.

8) What is MongoDB?

MongoDB is a popular NoSQL database that stores data in flexible, JSON like documents.

9) What is the difference between GET and POST requests in HTTP?

GET requests are used to retrieve data from a server, while POST requests are used to submit data to a server.

10) What is RESTful API?

RESTful API (Representational State Transfer) is an architectural style for designing web APIs that emphasizes statelessness and resource based operations.

11 - What is the purpose of a middleware function in Node.js?

Middleware functions are used to intercept incoming HTTP requests and responses, allowing for preprocessing, post processing, or error handling.

12) What is a callback function in Node.js?

A callback function is a function that is passed as an argument to another function and is executed when the latter function is completed.

13) What is the difference between promises and async/await in Node.js?

Promises and async/await are two different mechanisms for handling asynchronous operations in Node.js. Promises are based on event listeners, while async/await uses a more structured approach with a simpler syntax.

14) What is npm?

npm (Node Package Manager) is a package manager for Node.js that allows developers to install, publish, and manage third party modules.

15) What is Docker?

Docker is a containerization platform that allows developers to package their applications together with their dependencies and run them in isolated, consistent environments.

• Answer questions quickly and accurately. The faster you answer questions, the more points you will earn. Try to answer at least one question per minute.
•  Answer questions in detail.* The more detail you provide in your answers, the more points you will earn. Try to answer questions in at least three sentences.
•  Up vote other users' answers.* Up voting other users' answers will help them earn points and will also help you earn points. Try to up vote at least one answer per minute.
•  Answer questions in popular categories.* Questions in popular categories are worth more points than questions in less popular categories. Try to answer questions in categories that are popular with other users.
•  Use the search bar.* The search bar can help you find questions that are relevant to your interests. Try to search for questions that are similar to questions you have already answered.
•  Be active in the community.* The more active you are in the community, the more points you will earn. Try to answer questions, up vote other users' answers, and comment on other users' answers.
• Course Overview
• This comprehensive course delves into essential Node.js interview questions, equipping candidates with a solid understanding of key concepts and best practices. Through hands-on exercises, practical demonstrations, and insightful discussions, participants will master core Node.js topics such as the event loop, modules, async programming, and error handling, empowering them to excel in technical interviews and secure their desired Node.js roles.
• Course Description
• This course covers essential interview questions on JavaScript runtime environment Node.js for beginners. It explores topics such as Node.js architecture, modules and packages, event loop, async programming, error handling, and testing, equipping participants with the knowledge and skills to confidently navigate interviews and demonstrate proficiency in Node.js fundamentals.
• 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 - Express: A powerful and widely used framework for building web applications and APIs in Node.js. It simplifies the process of handling HTTP requests, routing, and rendering views.

2) MongoDB: A popular document based database that enables developers to store, manage, and access data in a flexible and scalable manner. It is well suited for applications that require high performance and fast data retrieval.

3) React: A front end library for building interactive user interfaces. It leverages a component based architecture and virtual DOM (Document Object Model) to make it easier to manage and update complex web applications.

4) Nodemon: A development tool that monitors changes in the file system and automatically restarts the Node.js application when any changes are detected. This eliminates the need for manual restarting and speeds up the development process.

5) Jest: A testing framework for JavaScript applications, including Node.js projects. It provides a user friendly interface and a wide range of features for testing both functional and non functional aspects of software.

6) Chai: An assertion library used in Node.js for unit testing. It offers a flexible and extensible syntax for writing test assertions and comparing expected and actual results.

How to Get More Points in Discussions:

• Engage actively: Participate in discussions regularly, contribute thoughtful comments and questions, and respond to others' posts.
•  Be respectful and constructive:* Use polite language, avoid personal attacks, and focus on providing value to the discussion.
•  Share knowledge and insights:* Offer unique perspectives, research, or experiences that add to the conversation.
•  Use relevant sources:* Support your arguments with credible sources (articles, data, studies) to enhance your credibility.
•  Ask clarifying questions:* If you don't understand something, ask for clarification to demonstrate engagement and interest.
•  Write thoughtful responses:* Take time to craft well written responses that contribute to the discussion, rather than rushed or dismissive comments.
•  Encourage others:* Show appreciation for valuable contributions by others, upvote or like their posts, and respond with positive feedback.
•  Follow discussion guidelines:* Adhere to any rules or guidelines set by moderators or instructors to ensure a productive discussion environment.
•  Proofread your posts:* Check for grammar, spelling, and formatting errors before posting to enhance readability and professionalism.
•  Avoid spamming or self promotion:* Focus on contributing meaningful content, rather than posting irrelevant or promotional messages.
•  Consider the audience:* Tailor your contributions to the specific discussion topic and target audience to increase relevance and engagement.

Browse our course links : https://www.justacademy.co/all-courses 

To Join our FREE DEMO Session: 

This information is sourced from JustAcademy

Contact Info:

Roshan Chaturvedi

Message us on Whatsapp: +91 9987184296

Email id: info@justacademy.co

Interview Questions On React Js And Redux

React Native Advanced Interview Questions

React Js Interview Questions And Answers For Experienced Pdf