Interview questions of node js for fresher
Node.js Interview Questions for Freshers
Interview questions of node js for fresher
Interview questions for Node.js for freshers delve into fundamental concepts, such as event-driven architecture, asynchronous programming, and the core functionalities of Node.js. These questions assess a candidate's understanding of the language's strengths and weaknesses, its use cases in various domains, and its integration with other technologies. They also gauge the candidate's ability to solve real-world problems using Node.js, demonstrate their programming skills, and explain how Node.js can enhance performance and scalability in web applications.
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1 - What is Node.js?
A runtime environment for building server side applications using JavaScript.
2) What are the advantages of Node.js?
Fast, non blocking I/O operations, real time data streaming, single threaded event loop.
3) What are the core modules in Node.js?
FS, Path, HTTP, HTTPS, URL, Utils.
4) What is the difference between “require” vs “import”?
“require” is used for synchronous module loading, while “import” is for asynchronous.
5) What is a callback function in Node.js?
A function that is passed as an argument to another function and executed when some asynchronous action is completed.
6) What is event driven programming in Node.js?
A programming paradigm where the flow of the program is dictated by events (e.g., user input, data arrival, timer expirations).
7) What are the different types of event emitters in Node.js?
EventEmitter, Stream, Net, DNS, ChildProcess.
8) What is an asynchronous function in Node.js?
A function that returns a Promise object or uses the “async/await” syntax, allowing for non blocking code execution.
9) What is a Promise object in Node.js?
An object that represents the eventual completion (or failure) of an asynchronous operation.
10) What are the HTTP methods supported by Node.js?
GET, POST, PUT, DELETE, HEAD, OPTIONS.
11 - What is a REST API in Node.js?
An application programming interface (API) that follows the principles of RESTful (Representational State Transfer) web services.
12) What is Express.js?
A popular Node.js framework for building web applications and APIs.
13) What is MongoDB?
A document oriented database that is often used with Node.js for data storage and retrieval.
14) What is Mongoose?
An Object Data Modeling (ODM) library for Node.js that simplifies interactions with MongoDB.
15) What are the security considerations for Node.js applications?
Use secure protocols (HTTPS), sanitize user inputs, implement authentication and authorization, use a web application firewall.
Strategies to Get More Points in Various Activities
Academic
- Attend class regularly: Presence and participation often contribute to points.
- Complete assignments on time:* Submission deadlines and assignment quality determine points awarded.
- Participate in discussions:* Contribute thoughtful insights and engage with classmates to earn participation points.
- Excel in exams:* Study diligently and demonstrate your understanding through accurate answers.
- Seek extra credit opportunities:* Take advantage of additional assignments or projects that offer bonus points.
- Sports
- Improve your performance:* Train consistently, develop your skills, and focus on enhancing your game play.
- Follow the rules:* Avoid penalties or deductions that can result in point loss.
- Be a team player:* Assist teammates, contribute to the team's success, and play to your strengths.
- Maintain sportsmanship:* Display fair play and ethical behavior, as unsportsmanlike conduct can lead to point penalties.
- Capitalize on opportunities:* Take advantage of key moments, such as scoring opportunities or defensive stops.
- Games
- Study the rules:* Understand the mechanics, scoring system, and strategies involved in the game.
- Practice consistently:* The more you play, the more familiar you become with the game and the better your chances of scoring points.
- Analyze your opponents:* Observe their strengths and weaknesses to develop effective strategies against them.
- Adapt to different situations:* Adjust your gameplay and tactics based on the game situation and your opponent's actions.
- Stay focused and composed:* Maintain a positive attitude and avoid distraction during gameplay to maximize your point scoring potential.
- Contests
- Follow the guidelines carefully:* Read the contest rules thoroughly to ensure you meet all requirements.
- Create high quality submissions:* Submit original, creative, and engaging content that meets the contest criteria.
- Promote your entry:* Share your entry with others, encourage voting or engagement, and follow the contest rules for promotion.
- Enter multiple times:* If allowed, submit multiple entries to increase your chances of winning or gaining points.
- Stay connected:* Keep track of the contest timeline, updates, and any additional opportunities to earn points.
- Social Media
- Post engaging content:* Create and share valuable, informative, or entertaining content that resonates with your audience.
- Interact with followers:* Respond to comments, ask questions, and engage in meaningful conversations.
- Run contests or giveaways:* Offer incentives to encourage engagement and grow your following.
- Collaborate with influencers:* Partner with other accounts to cross promote content and reach a wider audience.
- Use relevant hashtags and keywords:* Optimize your posts for discoverability and increase the reach of your content.
- Course Overview
- This course provides an overview of frequently asked Node.js interview questions for freshers, covering essential concepts like core modules, event loop, asynchronous programming, popular frameworks (e.g., Express.js), and debugging techniques.
- Course Description
- This course covers common interview questions for Node.js developers, providing comprehensive preparation for job interviews. It delves into core concepts, such as event-loop, I/O operations, error handling, and testing, equipping candidates with the knowledge and confidence to excel in Node.js interviews.
- 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 Core Concepts:
Modules, Event Loop, Non blocking I/O, Node.js Ecosystem.
2) Express.js Framework:
Routing, HTTP Verbs, Middleware, Templating.
3) MongoDB Database:
Data Modeling, CRUD Operations, Aggregation, Query Optimization.
4) Git Version Control:
Basic Commands, Branching, Merging, Pull Requests.
5) JavaScript Fundamentals:
Variables, Data Types, Functions, Control Flow, Object Oriented Programming.
6) Debugging and Testing:
Error Handling, Unit Testing (Jest/Mocha), HTTP Status Codes.
- Answer questions accurately and comprehensively. The more accurate and complete your answers, the more points you will receive.
- Be the first to answer a question.* The first person to answer a question correctly will receive a bonus.
- Answer questions in a timely manner.* The sooner you answer a question, the more points you will receive.
- Use your knowledge to help others.* If you see someone struggling with a question, offer your help. You will receive points for helping others.
- Participate in discussions.* The more you participate in discussions, the more points you will receive.
- Create content.* If you create content that is helpful to the community, you will receive points.
- Vote on content.* Voting on content helps to promote the best content and earn points.
- Invite friends to join the community.* You will receive points for each friend you invite who joins the community.
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