Senior Node Js Developer

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Senior Node Js Developer Interview Questions and Answers

Updated 8 Jul 2024

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Q1. Make a queue class in JavaScript.

Ans.

Implement a queue class in JavaScript.

  • Create a class with methods like enqueue, dequeue, isEmpty, and peek.

  • Use an array to store the queue elements.

  • Ensure proper error handling for dequeue on an empty queue.

Q2. System design of a chat application.

Ans.

A chat application system design involves real-time messaging, user authentication, message storage, and scalability.

  • Use WebSockets for real-time communication

  • Implement user authentication and authorization

  • Store messages in a database like MongoDB or Redis

  • Consider using a message queue like RabbitMQ for handling message delivery

  • Design for scalability by using load balancers and microservices

Q3. shopping portal system design

Ans.

Designing a shopping portal system involves creating a platform for users to browse, search, and purchase products online.

  • Implement user authentication and authorization for secure transactions

  • Design a database schema to store product information, user data, and order history

  • Develop a responsive front-end interface for users to navigate and interact with the portal

  • Integrate payment gateways for seamless transactions

  • Implement search and filter functionalities for users to easi...read more

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Senior Node JS Developer 5-9 years
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