Practice

I Hate Programming Questions

• They usually require a special "trick" to solve correctly

GitHub Repositories

• https://github.com/aizatto/interview-preparation
• https://github.com/trekhleb/javascript-algorithms
• https://github.com/basarat/algorithms

Online Practice

• HackerRank
• LeetCode
• CareerCup
• Interview Cake
• InterviewBit
• http://www.reddit.com/r/cscareerquestions/
• https://www.quora.com/HackerRank-What-are-the-coding-contests-sites-where-companies-hire-from

InterviewBit

• JavaScript seems to be using ES5 (2009)
  • No use of const/let

Offline Practice

Go to meetups

Books/PDFs

• Cracking the Coding Interview: 189 Programming Questions and Solutions 6th Edition
• Wealthfront Silicon Valley Career Guide

Live Programming Environment

• coderpad.io
• collabedit
• karak.io

When using these, ask wether the interviewer if they are comfortable with pseudo code, or is correct syntax/semantics important.