Frontend developer II

Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.

An input string is valid if:

Open brackets must be closed by the same type of brackets.

Open brackets must be closed in the correct order

.Every close bracket has a corresponding open bracket of the same type.

Implement a polyfill for Promise.all().(Link)

Given two strings s and t, return true if t is an anagram of s, and false otherwise.

An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once.

Given an array nums with n objects colored red, white, or blue, sort them in-place so that objects of the same color are adjacent, with the colors in the order red, white, and blue.

We will use the integers 0, 1, and 2 to represent the color red, white, and blue, respectively.

You must solve this problem without using the library's sort function.

Given a sorted array arr[] of size N, the task is to remove the duplicate elements from the array.

Implement Carousel behaviour in React Js.

Basic concepts on CSR, SSR, Debounce and Throttle, Optimization, Lazy loading, Js concepts.