Google Docs works via operational transformation. The basic idea of operational transformation is to transform (or adjust) the parameters of an editing operation according to the effects of previously executed concurrent operations so that the transformed operation can achieve the correct effect and maintain document consistency. Google produced a video about operational transformation for Google … Read more
I found this answer in Quora which has some very useful documents, videos and articles. Both answers are really good: http://www.quora.com/Job-Interviews/How-should-I-prepare-system-design-questions-for-Google-Facebook-Interview Also: How to Rock a Systems Design Interview How do I design an arbitrary system in an interview? System design – This is a very complete step-by-step guide/tutorial System Design Tutorials – A collection … Read more
API Gateway and Load Balancer are 2 different things. Load Balancer -> Its a software which works at protocol or socket level (eg. tcp, http, or port 3306 etc.) Its job is to balance the incoming traffic by distributing it to the destinations with various logics (eg. Round robin). I doesn’t offer features such as … Read more
Development Environment Well, you need a web server (depends on server-side architecture) like Apache or IIS to simulate the AJAX communication. Sometimes an editor for javascript is included in the editor of the server-side development language. There’s a interesting question about javascript IDEs: https://stackoverflow.com/questions/209126/good-javascript-ide-with-jquery-support Debugging Techniques & Profiling Use built-in browser debugging and profiling tools … Read more
Everyone who wants to be a PHP programmer, always takes only the first word and completely ignores the second. While “programming” is WAY more important than “PHP”, to be a PHP professional, one should be a programmer in the first place. So, I’d vote for the last one – reading books. Not on PHP, but … Read more