Software Development Engineer -1 Frontend

You are given an array of integers, arr, and a series of Q queries. Each query is defined by an inclusive range [low, high].

For each query, your task is to determine the total number of elements in the original array arr that fall within that specific range. That is, for a given [low, high], you need to count how many elements x in arr satisfy low <= x <= high.

You must return a list of answers, where the i-th element is the count corresponding to the i-th query.

Frontend Machine Coding: Currency Converter

visibility:hidden and display:none
Visibility:hidden and opacity:0

Polyfills

[1.5, 2.7, 3.8, 5.6].arrCeil() // [2,3,4,6]

Array.prototype.arrCeil=function(){
if(!Array.isArray(this))
   Throw new Error(“not a array”);

 return  this.map(Math.ceil);
}

console.log(1<2<3) true
console.log(3>2>1) false

True === 1 //

for(var i = 1; i<10 ;i+=2){ 
setTimeout(() => console.log(i+1)
),0

Create a Candlestick component. (like the one in Stock Trading Graphs)

1. What middlewares have you used? Are there any others you know?
2. How would you update the 1000th entry in the Redux store?
3. What is server-side rendering? What is hydration?
4. What is state normalization?

The VP of Technology conducted a discussion on the projects I worked on in my previous organisation.

Create three boxes centred within each other.

This round was taken by the DoE and was the final round. We discussed the remaining projects that were not covered in the previous round.

1. "I was asked more about the second project, which I couldn’t fully discuss earlier."
2. "We had a discussion on how we could build our own event tracking system, similar to MoEngage or GTM."
3. "Suppose there is a listing of 200–300 cars — how can we optimize it, considering loading all 200 at once wouldn't be feasible?"