All questions
- Explain the use of the arrow function in React The arrow function helps you to predict the behavior of bugs when passed as a callback. Therefore, it prevents bug caused by this all togeth... 2
- How can you update state in react js? A state can be updated on the component directly or indirectly. 2
- What is React State? It is an object which decides how a specific component renders and how it behaves. The state stores the information which can be changed ove... 1
- Explain synthetic event in React js Synthetic event is a kind of object which acts as a cross-browser wrapper around the browser’s native event. It also helps us to combine the... 1
- Name two types of React component Two types of react Components are: Function component Class component 2
- Explain yield catchphrase in JavaScript The yield catchphrase is utilized to delay and resume a generator work, which is known as yield catchphrase. 1
- What is the use of a super keyword in React? The super keyword helps you to access and call functions on an object’s parent. 2
- What are Props in react js? Props mean properties, which is a way of passing data from parent to child. We can say that props are just a communication channel between c... 1
- Explain the Presentational segment A presentational part is a segment which allows you to renders HTML. The segment’s capacity is presentational in markup. 1
- Explain the term high order component A higher-order component also shortly known as HOC is an advanced technique for reusing component logic. It is not a part of the React API,... 1
- What is meant by callback function? What is its purpose? A callback function should be called when setState has finished, and the component is re-rendered. As the setState is asynchronous, which is... 2
- What is dispatcher? A dispatcher is a central hub of app where you will receive actions and broadcast payload to registered callbacks. 1
- What is Jest? What is Jest? Jest is a JavaScript unit testing framework created by Facebook based on Jasmine. It offers automated mock creation and a jsdom environment.... 1
- What are the popular animation package in React ecosystem? Popular animation package in React ecosystem are React Motion React Transition Group 1
- Explain React Router React Router is a routing library which allows you to add new screen flows to your application, and it also keeps URL in sync with what’s be... 1
- Explain the term stateless components Stateless components are pure functions that render DOM-based solely on the properties provided to them. 1
- Name the important features of React Here, are important features of React. Allows you to use 3rd party libraries Time-Saving Faster Development Simplicity and Composable Fully... 1
- What is an action in Redux? It is a function which returns an action object. The action-type and the action data are always stored in the action object. Actions can sen... 2
- What is the ‘Store’ feature in Redux? Redux has a feature called ‘Store’ which allows you to save the application’s entire State at one place. Therefore all it’s component’s Stat... 1
- Define the term Redux in React Redux is a library used for front end development. It is a state container for JavaScript applications which should be used for the applicat... 1
- What is Flux Concept In React? Facebook widely uses flux architecture concept for developing client-side web applications. It is not a framework or a library. It is simply... 1
- State the difference between Real DOM and Virtual DOM Real DOM Virtual DOM It is updated slowly. It updates faster. It allows a direct update from HTML. It cannot be used to update HTML directly... 1
- Give me two most significant drawbacks of React Integrating React with the MVC framework like Rails requires complex configuration. React require the users to have knowledge about the inte... 1
- When was React first released? React was first released publicly (as open source) on 29 May 2013. React was created by Jordan Walke, a software engineer at Facebook (now M... 1