React Js Interview Question
● What is React js
● What is difference between virtual dom and shallow
dom, dom in React js
● What is controlled and uncontrolled component in
React js
● What is hooks in React js
● What is jsx, babel, webpack
● What is Redux
● What is reducer, action, store in Redux
● What is middleware in Redux
● Explain data flow in Redux
● What is Redux-Thunk
● What is Redux-Saga, Difference between
Redux-thunk and Redux-saga
● Difference between class component and function
component
● How can we implement componentWillUnmount in
function component
● useEffect,UseState, useMemo.useCallback hooks in
Details
● Explain lifecycle method in React js
● What is difference between export default and export
in React js
● What is portal in React js● What is reconciliation in React js
● What is useRef in React js
● What is server side render in React js
● What is useStrict in React js
● What is fragment in React js
● What is react router in React js
● What is node module in React js
● What is the default localhost server port in react js.
how can we change the local server port
● What is high order component in React js
● What is pure component in React js
● What is difference state and props in React js
● How to optimize React js app
● What is difference between React js and Angular js
● What is prop drilling in React js how to overcome it
● What is context api in React js
● What is super, constructor, render function in React jsHTML interview question
● What is <!Doctype html> in Html5
● What is difference between div and span in Html
● What is semantic tags and non semantic tags in
Html
● What is difference between html and html5
● What is Iframe tag in Html5
● What are the formatting tags in html
● What is difference <b> and <Strong> in html
● What is view port attribute in html
● What is attribute in html
● What is block level element and inline element in
html
● What is difference between Html and Html5Css Interview Question
● What is difference between css and css3
● What are the selector in css
● What is media query in css
● What is different position in css
● What is bom in css
● What is difference between PX,unit,em,rem in
css
● What is flex box in css
● What is pseudo selector in css
● How to make website responsive
● What are breakpoint for viewport responsive
device
● Why we use box-sizing in cssJavascript interview Question
● What is Ecmascript in Javascript
● What is difference between let ,cons and var
● What is spread operator, Rest operator ,
default parameter
● What is deep copy and shallow copy in
Javascript
● What is promise , callback function , async await
in in Javascript
● What is difference between promise and
callback in Javascript
● What is event bubbling and event capturing in
Javascript
● What is higher order function in Javascript
● Explain different-2 types of function in Javascript
● What is arrow function in Javascript
● Why we use call, apply bind method in
Javascript
● How many way to create object in Javascript● What is prototype inheritance in Javascript
● What is typescript
● What are the array method , string method
● What is difference between java and javascript
● What is throttling and debouncing in js
● What is Null and undefined in javascript
● What are the falsy values in javascript
● What is execution context, event loop ,stack,
call queue,microtask queue in Javascript
● What is setTimeOut and setInterval in Javascript
● What is object.seal and object.freeze in
Javascript
● What is difference between map and set in
Javascript
● What is Weakmap and Weakset in Javascript
● What is sessionStorage, localStorage , cookie,
● Write a program to sort an array
● What is use of json.stringify and json parse()
method in Javascript
● What are is map, filter , reducer in javascript
● What is generator function in Javascript
● How to stop event propagation in Javascript
● What is closure in Javascript
● What is housing in Javascript● What is dead zone in Javascript
● What is function currying in Javascript
● What is mutation observer in Javascript
● What is memorization in javascript
