Hi,
I have 8 years of experience as a developer in global product-based companies..
Recently I got call from google , facebook but I don't feel confident enough because I have never prepared up to that difficulty level.
I am actually facing scarcity of abundance. There are so many sites and so much of materials available online and I am really confused where to start.
It will be really helpful if some one could share the preparation strategy along with the preparation material .