A while back, buddy children to the US group interview, interviewed before and know that I got the Offer (though did not go back). I say give him a few points of knowledge, he said, how could test those too? The results of five test three, if he listen to me, how one could get 60 minutes pass without?

I also put this knowledge point for everyone to share it, more or less hoping to help you some.

1, tell me about the JVM is how a class is loaded into memory inside?

In fact, this problem is relatively simple, but you need to carefully study under the JVM, including his district, class loading mechanism, parents delegate, etc. In short JVM is certainly a focus of the interview.

2, talk about how Spring matters annotation, then went on to say about the transaction isolation level you understand.

A range of features some of the principles Spring is also compulsory, like AOP principles; while some of the principles of the database also need to know the following problem is often the exam.

3, talk about MySQL indexing structure, optimize the index talk about you encounter slow or SQL optimization experience.

MySQL is used in every company in the database, so he is p3, usually around the problem in the index structure, index optimization, MVCC and the sub-library sub-table.

4, now you do QPS project is how much? For performance issues you have done what?

This problem is very embarrassing, I do obviously 2B business, please do not talk to me about high concurrency can it? But still we must be prepared for the interview, such as some key elements: clipping (not inside the Dragon), current limiting, fuse, demotion, plan, knowledge of these key points still need to prepare for it, at least not cold field Well .

5, to write a binary search.

Of course, not necessarily allow you to write binary search algorithm but always examinations you a question, so this requires you to work hard, I remember before I recommend it? LeetCode line on the Chinese version of the day, a question, the interview will be invincible.

In fact, it can be seen from the above, knowledge of the interview are in fact fixed, a new name, as long as you grasp the principle, and the rest is not a problem. Having said that, or come up with something to the actual point of it, here are some of the advanced materials.

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