JavaScript - Interview Questions and Answers for 'JavaScript' | Search Interview Question

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Q31. What are the benefits of using UI framework like Angular , View js etc instead of plain vanilla js and html ?

Ans. These frameworks facilitates easier product development and enhancement and maintainability by having separation of concerns ( using oops ) and helps in development of reusable libraries / components. So in nutshell , they make development and maintenance of large scale application easier.

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Q32. How can print the whole object state in the console in javascript ?

Javascript

Ans. We can JSON.stringify

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Q33. How can you trim all strings in an array ?

Ans. array.map(s => s.trim())

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Q34. Is it safe to use session storage ?

Javascript

Ans. Session storage can be accessed from XSS (Cross site Scripting) attacks but cookies (if set with "HttpOnly" and "Secure" flags) are more safer against these attacks.

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Q35. What is Array.Map function ? What will be output of following ?

const myArray = [1, 4, 9, 16];
const result = myArray.map(x => x * 2);

Javascript

Ans. It will create an array with each value as x*2

[2, 8, 18, 32]

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