Cognizant ReactJs Interview | 🎉 Selected | ReactJs & Javascript | Frontend Interview

This is just the interview experience and If you know the right answers please comment below which can also help others.

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@devaditya

[TheReactGuy]

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[sameeryadav]

In the React code, it should be if(name === 'changecolor'){}. Also, in the button, it would be <button style={{ backgroundColor: color}}, because color is a variable.

[rajulinda]

You won't believe me...but 2 days before I had an interview and the questions were the same ... literally same

[serial_chiller_rides]

Visibility hidden - element is there, it takes the space in page, but it's hidden. Display:none - element is completely removed from the page.

[sapkatharatm]

After seeing this interview.. I've got the confidence.. that I can also crack the interview like this 🎉

[prasadharmalkar]

Knowledgeable... We need more videos like this 😉

[infinteuniverse]

Indian IT companies rely too much on definitions. I bet most people use it but don't know how to define it.

[nitigyajoshi]

I think event bubbling definition you gave is wrong. Event bubbling is a way of event propagation in the HTML DOM API. Suppose there is a element with a child element and both have registered a event listener for same thing. So with bubbling, when the event is fired, it is handled by the innermost element and then propagated to outer elements.

[nitigyajoshi]

Psuedo classes are hover, active, disabled, first-child, nth-child, etc. whereas psuedo elements in css are ::before, ::after, etc. You gave opposite example in interview.

[shivam]

I like how he is giving examples, plenty of them were not so accurate still examples show the degree of experience he had.

[mr_who]

I don't why these guys are still using class based components when there are functional based component which is way more easier than class components

[greedo]

Thanks for exposing Cognizant’s interview questions. Immediate grounds for firing.

[javascriptduniya]

In 2022, We should be using react functional components not class.

[anandv]

Very basic level questions, because nowadays each react js developer is expecting min 20L, and some are asking 40L also. Hope we need to start with react js and javascript instead of HTML and css.

[Digi_Blocks]

Visibility hidden - DOM will have(available at the code level-can be rendered), Display done - DOM wont have(wont available at the code level - wont available to render),

[shahi]

Seriously is this the level of cognizant, They ask these questions to a guy with 2+ years of experience

[rohitreddy]

This interview is too easy 🗿. I was able to answer every question.

[phoneix]

No one asks questions on unit testing the code which is perhaps one of the most important things a developer can do to ensure quality.
Also what is the purpose of asking someone what a box model is? A front end developer doesn't have to know what a combination of content, margin, border is called if he knows what they are and how to use them properly. These guys ask ridiculous questions to devs.

[johnkiran]

Html:
Event bubbling and Event looping
Semantic tags in html
Css:
Box model
Visibility vs display
Flex
Pseudo classes and pseudo elements
Margin vs padding
Js:
Closure
Var vs let
Hoisting
Code to change colour of button
Prevent multiple onchange - debounce
Redux

[supersardar]

Thank u so much. I've been so confused, but tNice tutorials video helped a lot.