React Interview Questions & Answers đź’ˇ What is the difference between PureComponent and component? React.PureComponent is similar to React.Component. The difference between them is that React.Component doesn’t implement, but React.PureComponent implements it with a shallow prop and state comparison. PureComponent will do a shallow comparison on both props and state when they changed while Component […]
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Top React Routing Questions & Answers This Article contains Question of React Router V5 and V6 React Router v6https://reactrouter.com/docs/en/v6/getting-started/overview đź’ˇ What are route matching components? Switch and Route are the two route matching components. When a <Switch> is rendered, it searches through its children <Route> elements to find one whose path matches the current URL. […]
Read More → React JS Interview Questions & Answers đź’ˇ What is a Hook in React? Hooks are a new addition to React 16.8. Hooks are functions that let you “hook into” React state and lifecycle features from function components. Hooks don’t work inside classes. React provides a few built-in Hooks like useState. You can also create your […]
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Higher Order Component with Functional Component đź’ˇ A pattern where a function takes a component as an argument and returns a new component. A higher-order component (HOC) is an advanced technique in React for reusing component logic. HOCs are not part of the React API, per se. They are a pattern that emerges from React’s […]
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Top React JS Interview Questions and Answers đź’ˇ What are DOM or real DOM? DOM stands for “Document Object Model”. It represents the entire UI of the web application as a tree data structure. In simple terms, it is a structural representation of the web application’s HTML parts & elements. đź’ˇ Why Real DOM is […]
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React JS Interview Questions & Answers âś” What is NPX? The npx stands for Node Package Execute and is included with npm. If you install npm above version 5.2.0, npx will be installed as well. It’s a npm package runner that allows you to run any package from the npm registry without having to install […]
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Cyber Security Fundamental Questions & Answers What is a brute force attack? A brute force attack, or exhaustive search, is a cryptographic hack that uses trial-and-error to guess possible combinations for passwords used for logins, encryption keys, or hidden web pages. What is password spraying? Password spraying is a type of brute force attack. In […]
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Application & Web Security Interview Questions âś” What is the meaning of 256-bit encryption? To transmit electronic documents or data over the internet, we use encryption algorithms and when encryption uses a key of 256-bit length, that is called 246-bit encryption. âś” What is the Cipher suite? Cipher Suite is a set of algorithms that […]
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Top Scrum Master and Agile Question & Answers âś” What is the User story INVEST Model in Agile? A good user story should be: Independent (of all others)Negotiable (not a specific contract for features)Valuable (or vertical)Estimable (to a good approximation)Small (so as to fit within an iteration)Testable (in principle, even if there isn’t a test […]
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Trapping Rain Water Leetcode This question is taken by LeetCode. You can find question detail by the below link. Let’s write an optimized solution to this problem. https://leetcode.com/problems/trapping-rain-water/ Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap after raining. Example 1: Input: height = […]
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