ReactJS experience test

Fullname *

Email *

Do you think the package-lock.json file is important in our project?

No, it's useless and cause many code conflicts

Yes, it's so important

I usually don't care about that file

Have you done any project that allow users to chat or call with each other?

Yes

No

What is the output of this script

for(var i=0; i<=3; i++) {

    setTimeout(function() {
        console.log(i)
    }, 0)
}

4, 4, 4, 4

1, 2, 3, 4

it's depended on speed of the running machine

Do you think TypeScript is better than JavaScript?

No, it's the same and we can use what ever we want

Yes, TypeScript has better scalability

Yes, TypeScript is simpler to learn

Do you have experience writing unit test in React.JS project?

Yes

No

Do you think static typing (like TypeScript) is necessary for large-scale project? Why or why not?

Have you contributed to open source project? If yes, list the project below

What is Virtual DOM? How does Virtual DOM help optimize React.JS performance?

Did you use functional component? When do you prefer to use functional component over class-based component in React.JS?

Do you know circular reference? Can circular reference cause memory leak in javascript application? Why or why not?