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Java zero foundation encyclopedia recommended by front-line architects and advanced route of Java engineers

Preparation before interview

honestly , I usually look at some interview questions when I'm free , So I go straight to the face . But I still want to suggest that if you are preparing for an interview , The following preparation is needed

  1. Recite the question : Take a look at the recent face Scripture , Understand what kind of questions the company is facing now , Prepare some common questions , Open your back ! If some basic js No, that's a small problem .

  2. Algorithm : Do some arithmetic problems ,leetcode One, two or three stars above are enough , The front-end algorithm is very simple , It's basically the difficulty of junior high school mathematics .

  3. project : Project review , You do the project from the technical architecture to the source code to do enough to understand , At least don't be asked by the interviewer during the interview . And show your role in the work , Reflect self drive ( Big companies value self drive )

  4. Bright spot : Prepare for the highlights , You don't have to answer all the questions , But there must be bright spots in the interview process ( Or you'll get feedback , The interviewer said you were OK , But never ~) I usually prepare a few points , Every point is guaranteed to sleep for half an hour . In addition, we must understand it deeply , And be able to express it in your own words !!( A few points I prepared , performance optimization 、 engineering 、 cache 、http)

  5. push : It's better to find someone to push in , The success rate will increase a little

  6. try : Find a few companies you don't want to go to first ( It's about the same size ) Practice hands , If you go to your favorite company for the first interview , The elimination rate will be very high .

  7. State of mind : Mindset is important , The interview is just normal , Don't prove you're not good , It's just not suitable for , Summarize interview experience , Prepare for the next time .

  8. Answer the questions : How to make a good answer to your own problems , This is the key

  • Clear logic : Make sure the logic is clear , Otherwise, even if you know the answer to this question , The interviewer will not be satisfied , If you have a clear logic , Even if the answer doesn't , The interviewer will also give you points

  • Unique understanding : Today's interview questions are very similar , So it's important to show your strengths . Combine your business and your own knowledge base

  • Think deeply : We must think deeply about every problem , Otherwise, it's hard to get into big companies , In order to get good results in the interview, we should have a promotion in depth

  • Fluent expression : Interview is a process of expression , There are some problems that I can't understand in my mind , And express it fluently , Basically, if the interviewer thinks you're fluent , When you're in the middle of it, you won't be allowed to go on , The proof has been passed

Writing questions is absolutely the most important thing , So I asked my classmates in Ali to come to their company P8 A series of interview questions for large factories , Brush till it's dark , Now it's a perfect ending , These interview questions also have a core structure advanced knowledge points that I collected before . The existence of network disk is not very useful , So share it here for free to friends in need

 It is recommended by the architects of large front-line factories Java Zero foundation Encyclopedia ,Java Engineer Advanced route _Java

Bytes to beat 4 Noodles (3 Surface technology +1 Noodles HR) Interview experience

1.1 The byte is bouncing

  1. First, introduce yourself ,balabala……( Omit three minutes here )

  2. Find one of your projects and talk about it , First of all, your project introduction , What responsibilities did you take on , What has been done , difficulty ( Differ from man to man , This will not be repeated ,balabal……( Omit three minutes ))

  3. You can see from your project that , You're using mysql,mysql Of int What are the data types ? From small to large , How many bytes each takes up ?

  4. java Medium int What are the ? How many bytes take up

  5. Ask you a question about computer network ,tcp Three handshakes and say ?

  6. tcp and udp The difference between ?

  7. You said you were familiar with linux, I'll give you a case study , Search out log Most frequent occurrences in text IP, And give the number of times

  8. Under the said java Of gc?

  9. The way hashmap This data structure ?

  10. If you do a search haspmap What is the time complexity of ?

  11. I'll give you an algorithm. You can have a look at it , There's an infinite array of integers , Sort from small to large , Non-increasing . So how to find one in the array key?

  12. gossip

Then he asked me which book I read recently , What has been learned , What are you still learning recently ? Asked me about career planning , Hobby , Also said the company's language selection , I later asked about my interview performance evaluation , It's not convenient for people to say , I also asked about the cultivation of new people .

1.2 Byte jumps on two sides

  1. Self introduction. (balabla)

  2. And then say it mysql The index structure of

  3. Look at a problem , How to index this question

(1) The first question : mysql The order table has several properties : Order id, user user_id、 Order date date( Accurate to the sky ) etc. , How to build the index a. Query all orders of a user b. Query all orders for a day c. Query all orders of a user on a certain day (2) The second question : 10G file , One for each line uint32 Numbers . There is one 1G Memory machine - A. Find the biggest k Number - B. Find out the repeating numbers (3) The third question : I have a bunch of cards in my hand , But the audience doesn't know the order of it . First step , I take a card from the top of the card , Put it on the table . The second step , I'll take another card from the top , At the bottom of the card in your hand . The third step , Repeat first / Two step operation , Until all the cards in my hand were on the table . Last , The audience can see that the order of the cards on the table is :13\12\11\10\9\8\7\6\5\4\3\2\1 Excuse me, , What's the order of the cards I've just started to hold in my hand ? Use code to implement the following

1.3 Byte jumps three sides

The interviewer should be a director level , I'm very tough , It must be a senior man , All in one 40 More minutes . I didn't ask about the basis of the regular interview , The project and algorithm are pure .

  1. Self introduction.

  2. What do you think are the difficulties you are facing now ? Difficulties in the project ?

  3. How big is your project database ?QPS How many? ? Which? sql It's slow ?( I won't talk about the project ……balaba)

  4. So you think that in the future qps Bigger words , How do you design ?

  5. I'll give you an algorithm problem , Take a look at the ideas

  6. Let's have a chat for two minutes , What do you want to ask me

1.4 Byte jumps on all sides

HR Noodles , about 35 minute , It's mainly about personal career planning 、 salary , And the expectation of byte skipping and so on

《MySql Interview topics 》

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 It is recommended by the architects of large front-line factories Java Zero foundation Encyclopedia ,Java Engineer Advanced route _ The backend development _03

《MySql Performance optimized 21 Best practice 》

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《MySQL Advanced knowledge notes 》

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The information presented in this paper includes :**《MySql Mind mapping 》《MySql Core notes 》《MySql Tuning notes 》《MySql Interview topics 》《MySql Performance optimized 21 Best practice 》《MySq Advanced knowledge notes 》** Here's the picture

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This article has been  CODING Open source project :【 A big factory Java Analysis of interview questions + Core summary learning notes + The latest explanation video + Actual project source code 】 Included

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