José Thomaz josethz00

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?

	#!/bin/bash

	echo "Searching for node_modules directories..."

	# Assuming NVM is installed in the default location, update this if you have a custom NVM directory
	NVM_DIR="$HOME/.nvm"

	# exclude nvm
	find $HOME -path $NVM_DIR -prune -o -name "node_modules" -type d -print \| while read dir; do
	echo "Deleting $dir..."

	import boto3, dotenv, os

	# Load .env file
	dotenv.load_dotenv()

	# Oracle Cloud Infrastructure has a compatibility API for S3, so we can use the boto3 library to connect to OCI Object Storage
	# For more information on the compatibility API, see: https://docs.cloud.oracle.com/en-us/iaas/Content/Object/Tasks/s3compatibleapi.htm
	# Keep in mind that for the compatibility API to work, you need to do some extra configuration in your OCI Object Storage Bucket
	s3 = boto3.resource(
	's3',