> They don't know deeply at least one or two techniques and tools.

I think we see people from so many different walks of life that for junior people the goal is to make sure that they know the shit that they have in their resume and drill them if they don't. As in, we don't hire for specific techniques or tools because the team has its own collection of tools/libraries (Spark/Hadoop/Python/Word2Vec/CF etc) which you will be able to pick up fast if you are good enough.

I think you misread what eshvk was saying; he isn't saying that they don't know one or two specific techniques or tools, but rather they don't have any tools/techniques at all that they know deeply. If you read what followed the part you quoted, it should become clear.