The questions vary. However, it didn't include any coding questions. Most interviewers have terrible English skill. They don't really understand you, and sometimes don't even know how to say things correctly.
For example, "Do you know ACID?" (he pronounces ACID as "a, c, i, d" all letters individually spelled out) instead of pronouncing as the word "acid". So if you say no, terrible, you now got a negative mark. He explains what it is, then you say oh you mean acid, which stands for "Atomicty, Consistency..." and then he agrees; but doesn't matter. You already got a negative point there.
Most questions are basically like that "do you know x framework" or "x technology". Other type of technical question is "tell me about the architecture of what you're working on" and then when you talk about it, they ask something about that architecture. The problem is, sometimes they ask irrelevant part, which you don't really mention in the architecture. For example if you're doing some back-end work for some product, they might ask you something related to front end. It just seemed to me that they want to steer the conversation to the areas which is outside of your main responsible area.
The other thing they insisted was, Alibaba specific open source technologies. They expect you to know it.
Best way to study this interview is:
1) Study your tech stack. If it is Java for example, read a lot about how JVM works, threading works, GC works, memory model works etc.
2) Get the job description, read about all the frameworks. Especially if they list something you've not heard of it; or not too sure how it works.
This is for back-end purposes. They don't seem to use RESTful APIs, insist using RPC frameworks. So do read up about the web frameworks' RPC support.