Inan inanmadak

Senior Frontend Interview Questions

Some questions about frontend development that might be in your next job interview. The questions were formulated by @mauvieira, a super senior fullstack developer

General Frontend

What are the strategies we can use to optimize the performance of web applications?
- CDNs, GraphQL (maybe) to reduce overfetching, improve backend performance, use SSR and/or SSG, lazy loading for loading assets only when it's needed, minimize and compress HTML, CSS and JS files, and optimize images by compressing and resizing them.
What are Web Vitals (LCP, FID, CLS)? And how are they applied in the real world?

The Ultimate Unit Testing Cheat-sheet

Sinon Chai
Chai
Sinon

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

	var AWS = require('aws-sdk'),
	fs = require('fs');

	// http://docs.aws.amazon.com/AWSJavaScriptSDK/guide/node-configuring.html#Credentials_from_Disk
	AWS.config.loadFromPath('./aws-config.json');

	// assume you already have the S3 Bucket created, and it is called ierg4210-shopxx-photos
	var photoBucket = new AWS.S3({params: {Bucket: 'ierg4210-shopxx-photos'}});

	function uploadToS3(file, destFileName, callback) {

	/* *******************************************************************************************
	* THE UPDATED VERSION IS AVAILABLE AT
	* https://github.com/LeCoupa/awesome-cheatsheets
	* ******************************************************************************************* */


	// 0. Synopsis.
	// http://nodejs.org/api/synopsis.html