Infosys Interview Questions For Node Js
Infosys Node.js Interview Questions
Infosys Interview Questions For Node Js
Infosys interview questions for Node.js are designed to assess a candidate's knowledge and skills in the JavaScript runtime environment. They delve into various aspects, such as asynchronous programming, event-driven architecture, module systems, error handling, and performance optimization. By evaluating these areas, Infosys can identify candidates who possess the necessary technical proficiency to contribute effectively to their development teams. Additionally, understanding Node.js is crucial for the company's ongoing commitment to delivering innovative digital solutions to its clients.
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1 - What is Node.js?
Node.js is an asynchronous, event driven JavaScript runtime environment that leverages the Google V8 JavaScript engine.
2) Why use Node.js?
Node.js enables rapid development of real time applications, web pages, and network tools due to its event loop architecture.
3) Explain the event loop in Node.js.
The event loop is the core mechanism in Node.js that manages asynchronous tasks. It continuously checks for pending events, executes them, and schedules callback functions for later execution.
4) What are the key modules in Node.js?
Key modules include the file system module (fs), the os module, and the events module. These modules provide functionality for working with files, the operating system, and events, respectively.
5) What is a callback function?
A callback function is a function that is passed as an argument to another function. It is called after the first function has completed its execution.
6) What is a promise in Node.js?
A promise is an object representing the eventual result of an asynchronous operation. It allows developers to handle the result of an operation without the need for nested callbacks.
7) Explain the difference between synchronous and asynchronous code.
Synchronous code executes in a sequential manner, while asynchronous code allows other operations to occur while waiting for a result. Node.js heavily utilizes asynchronous code to avoid blocking the event loop.
8) How does Node.js handle concurrency?
Node.js handles concurrency through a single threaded event loop. Asynchronous tasks are scheduled and executed in the event loop, allowing multiple requests to be processed concurrently without blocking the main thread.
9) What are the advantages of using Node.js for real time applications?
Node.js's event driven architecture and high performance make it an ideal choice for building real time applications that require fast and responsive communication.
10) Explain the concept of streams in Node.js.
Streams represent sequences of data that are processed in a continuous manner. They provide a convenient way to handle large amounts of data efficiently without having to load the entire data into memory.
11 - What is the role of Express.js in Node.js?
Express.js is a popular web framework for Node.js. It provides a set of middleware functions that simplify the development of HTTP applications.
12) What are some security considerations when using Node.js?
Node.js applications should be developed with security in mind, including handling user input validation, preventing cross site scripting (XSS) attacks, and avoiding the use of deprecated or vulnerable modules.
13) Explain the importance of testing in Node.js.
Testing is crucial for ensuring the quality and reliability of Node.js applications. Unit testing, integration testing, and end to end testing are essential for catching bugs and ensuring that applications meet requirements.
14) What are some best practices for writing efficient Node.js code?
Optimizing for asynchronous operations, caching data to reduce redundant operations, and utilizing built in modules are among the best practices for efficient Node.js development.
15) Discuss the future of Node.js.
Node.js continues to evolve with new features and improvements. Its popularity in server side development, microservices, and IoT applications is expected to grow in the future.
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- Course Overview
- This comprehensive course equips you for technical interviews at Infosys by covering key Node.js concepts, essential for web development proficiency.
- Course Description
- Master the art of acing Node.js interviews with this comprehensive course. Explore commonly asked technical questions, coding challenges, and behavioral inquiries tailored to Node.js developers. Gain insights into data structures, algorithms, and design patterns relevant to Node.js development. Enhance your interview preparation and boost your chances of securing your dream job.
- 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
Tools Used in “Infosys Interview Questions for Node.js” Course:
1 - Visual Studio Code: An open source code editor with debugging and code completion features tailored for JavaScript and Node.js development.
2) Node.js Runtime: The JavaScript based runtime environment required to execute Node.js applications. Provides access to core modules, networking capabilities, and file system operations.
3) Express.js: A lightweight framework for building web applications in Node.js. Simplifies routing, middleware handling, and HTTP request/response handling.
4) Jest: A testing framework for JavaScript and Node.js. Supports unit testing, integration testing, and mocking. Enables developers to create comprehensive test suites to ensure code reliability.
5) MongoDB: A NoSQL database system designed to store and manage document oriented data. Provides flexibility in data schema design and is commonly used in Node.js applications.
6) Socket.IO: A library for real time communication between a server and multiple clients. Enables the creation of interactive and data intensive applications with real time data updates.
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100 Node Js Interview Questions
