Nxtra Data IT Infrastructure Manager Interview Questions and Answers

I have a solid understanding of JS, Node.js, React, and MongoDB, with practical experience in building full-stack applications.

• JavaScript: Proficient in ES6+ features, asynchronous programming, and DOM manipulation. Example: Built a dynamic web app using vanilla JS.

• Node.js: Experienced in building RESTful APIs and handling server-side logic. Example: Developed a Node.js API for a task management app.

• React: Skilled in c...read more

Modules in Node.js are reusable blocks of code that encapsulate related functionality.

• Modules in Node.js can be built-in modules like fs (file system) or third-party modules like express.

• Modules help in organizing code into separate files for better maintainability and reusability.

• Modules can be imported using the require() function in Node.js.

Indexes in MongoDB improve query performance by allowing the database to quickly locate and retrieve specific documents.

• Indexes help to speed up query performance by allowing the database to quickly locate specific documents based on the indexed fields.

• Without indexes, MongoDB would have to perform a collection scan, which can be slow and resource-intensive.

• Indexes can be created on single fields or compound fields to ...read more

Hooks are a feature in React that allow you to use state and other React features in functional components. useRef is a hook that allows you to create a mutable object that persists for the lifetime of the component.

• Hooks are used to add state and lifecycle methods to functional components in React

• useRef is used to create a mutable reference that persists between renders

• useRef can be used to access DOM elements directl...read more

Python is my favorite programming language due to its simplicity, versatility, and strong community support.

• Easy to learn: Python's syntax is clear and concise, making it accessible for beginners. Example: 'print("Hello, World!")'.

• Versatile: Used in web development, data analysis, artificial intelligence, and more. Example: Django for web apps.

• Strong libraries: Rich ecosystem with libraries like NumPy for numerical com...read more

I approach code reviews as collaborative opportunities for improvement, valuing feedback for personal and team growth.

• I actively seek feedback from peers to enhance code quality and maintainability.

• I provide constructive feedback, focusing on code clarity and best practices, like suggesting clearer variable names.

• I view code reviews as learning experiences, often discussing alternative solutions or design patterns.

• I en...read more

Create a div that starts a timer when hovered over

• Create a div element in HTML

• Use CSS to style the div

• Add JavaScript event listeners for hover

• Start a timer using JavaScript when hover event is triggered

Build a secure OTP component for authentication purposes.

• Generate random one-time passwords using a secure algorithm

• Implement time-based expiration for OTPs

• Provide a way for users to input and verify OTPs

• Store OTPs securely to prevent unauthorized access

• Consider using multi-factor authentication for added security