SDE II - Frontend

Implement polyfill for Promise.all() method in javascript. (Learn)

Questions on Batching in React, Hooks, and Component lifecycle.

calc(10).add(5).multiply(2).val() // should return 30[(10+5)*2=30]

My Solution:
const calc= num => ({
 add: x=> calc(num+x),
 multiply: x=> calc(num*x),
 val:()=> num,
})

Ninja has been given two sorted integer arrays/lists ‘ARR1’ and ‘ARR2’ of size ‘M’ and ‘N’. Ninja has to merge these sorted arrays/lists into ‘ARR1’ as one sorted array. You may have to assume that ‘ARR1’ has a size equal to ‘M’ + ‘N’ such that ‘ARR1’ has enough space to add all the elements of ‘ARR2’ in ‘ARR1’.

For example:

‘ARR1’ = [3 6 9 0 0]
‘ARR2’ = [4 10]
After merging the ‘ARR1’ and ‘ARR2’ in ‘ARR1’. 
‘ARR1’ = [3 4 6 9 10]

You are given a string 'S'. Your task is to reverse the vowels in the string while keeping the consonants unchanged.

Note:

The alphabets 'a', 'e', 'i', 'o', and 'u' are vowels, while all the remaining alphabets are consonants.

YouTube PlayBack: How would you implement the feature of YouTube that plays from the timestamp that you last left?

Explain concepts like Module Federation, MicroFrontends.

Explain React Hooks. (Learn)

Articles website (Provides publishing, editing & deleting articles functionality).