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Love, love! Alibaba's internal open source sharing of online shopping mall projects based on spring boot, spring cloud, redis, MySQL and many other technology stacks!

Preface

This content comes from me 16 A senior student who graduated in , First in 58, After Ali , Now I'm ready to change jobs , The following is his recent interview experience ( And the summary of learning materials before and after each interview ):

I recently left the factory and stayed in Hefei for a month , I have been preparing for more than half a month , from 7 At the end of the month, I started to submit my resume for interview , At present, it is java Senior position , So far it's been done 24+ Company , There are also some intentions in hand offer. Now take a general note of the interview questions you've had against the interviewer . I hope it can be helpful to the friends who are preparing for the interview and those who have failed in the interview . Need full HD PDF File partners just need to like the article , After paying attention to me, there is 100% free access at the end of the article !

Hand tearing code serial gun

  1. Do you understand the singleton pattern ? With what kind of ?
  2. Write a singleton pattern ? What's wrong with this singleton pattern ?
  3. sychronized How to use the ?
  4. volatile Well ?
  5. Write a bubble algorithm ?
  6. If you have an array [1,2,3,3,4,4,5,6,6,7], Relatively increasing order , Given a value, suppose 3, Print the first index subscript that the value appears in the array ? Analyze the time complexity of your program .
  7. Write a quick sort ? How to implement non recursion ?
  8. Write a binary tree to traverse the order before ? Non recursive middle order traversal of binary trees ?
  9. If you have an array [3,2,2,3,3,4,4,5,6,6,7,4,4,4], There's duplicate data , Now it's time to go heavy , It is required that the array elements after de duplication are consistent with the index order of the original data . Analyze the time complexity and the space complexity ? Is there a better solution ? What's the idea ?
  10. If you have an array [1,3,7,3,8,4,9,6], Now the index index of two numbers with the largest difference in the array is required . If the index index index is large, the minus index index index is small . Analyze the time complexity and the space complexity ? Is there a better solution ? What's the idea ?
  11. Writing a LRU Cache, guarantee get/put api All are O(1) Time complexity of ?
  12. Write a program to achieve the minimum stack ?

Network protocol serial gun

  1. Do you know network protocol ?
  2. The way 7 What layers are the layer network protocols ?
  3. Let's talk about it. I input a from the browser url What is the whole process of visiting tmall website ?
  4. DNS do ?
  5. CDN Understand? ? What do you do? ?
  6. If I visit 12306, It's a slow discovery , How to troubleshoot ?
  7. The way http What are the requests for the protocol ?
  8. The way https And http The difference between ?
  9. The way http What are the status codes of , What does it mean ?
  10. The way HTTP in session and cookie The difference between ?
  11. The way HTTP The process of establishing links ?
  12. RPC Have you ever used a frame ? Is based on TCP Agreed ?
  13. The way TCP The handshake and wave of the agreement ? Why three handshakes , Four waves ?
  14. TCP Slide the window to see ? What problems have been solved ?
  15. If my RPC There's a lot of service Timewait and closewait How to check the links of ?
  16. TCP Do you know long links and short links ? What's the difference? ? What scenarios do they apply to ?
  • Talk about network protocol

  • At a glance :

 

Design mode serial gun

  1. What strategy patterns have you used ? Take a few examples ?
  2. mybatis perhaps spring Have you read the source code ? Know what design patterns are in it ?
  3. java Do you understand the class loading mechanism ? What design pattern is used ?
  4. Has the single case mode been used ? Write a singleton pattern ? Are there any other implementation solutions ? What's the difference? ?
  5. Say what is a strategic model ? What are the advantages and disadvantages ? Tell me where the proxy model will be used ?
  6. If I want to dock with a third-party system , But my own business service agreement doesn't support , If it is supported, there is a certain transformation cost , Which design pattern will reduce the intrusion into the system ?
  7. Let's talk about the difference between adapter mode and bridge mode ?
  • 23 Design patterns PDF

  • At a glance :

 

Business system architecture chain gun

  1. Hello , I am a xx My name is... The interviewer of the company xx, You should introduce yourself first ?
  2. Tell me what you are good at ?java Back end ? More specifically ?
  3. How do you use these technologies ?
  4. Tell me about the projects you are familiar with ?
  5. Tell me which systems or large modules you do independently owner Developed ? What are the challenges ?
  6. Draw a business architecture ? What are the core business models in it ?
  7. What are the business areas ?
  8. If it's a microservice architecture, how do you divide so many projects ? Why do you do this ?
  9. What do you think is the disadvantage of the architecture model of this system ?
  10. DDD Understand? ? If it's you, how do you sort out domain models ?
  11. How do you design engineering architecture and business function modules without relying on any specific framework ? Tell me what the benefits of doing so are ?
  12. Talk about a few business processes that you are familiar with , On paper / Draw on the whiteboard ?
  • The way of building cultivation

  • At a glance

hr Serial guns

  1. Hello , What do you think of our interview process ?
  2. What do you think of our interviewer ?
  3. How about the office environment of our company ?
  4. What kind of content did you do in your last company ? What kind of growth ?
  5. Why did you leave your last company ?
  6. Tell me about your impression of the last company ? How about the working atmosphere ?
  7. Do you have any requirements for your next job ? What kind of work do you want to do ?
  8. What impresses you at work ? How did you solve it ?
  9. Tell me if you have anything else you need to learn recently ? How do you usually learn ?
  10. What do you think you have ?
  11. Do you have a girlfriend? ?
  12. Our company will have overtime at present , Can you accept ?
  13. What is the minimum salary you expect ?
  14. How long have you been interviewing now ?
  15. There are a few on hand offer? If you give your offer What's the quickest time you can be employed ?

Performance optimized serial gun

  1. done java Program performance optimization ?
  2. If I had one RPC There's a service FGC How to troubleshoot ?
  3. If I have a lot of services on different machines , One of the services has a serious timeout. What should I do ?
  4. If I find out through monitoring CPU What do you think about the high speed ?
  5. One sql The execution is slow. How would you investigate ?
  6. RPC Do you understand the principle ? say something RPC Call procedure for ?
  7. If you go to design one RPC Framework in which aspects will you consider the performance and high availability of this framework ?
  8. Talk about why service governance is needed ?
  9. The introduction of docker/k8s What are the advantages and disadvantages ?
  10. What is the continuous integration system you use when you deploy your system ? What are the features to improve development efficiency ?
  11. Have you done a performance test ? How to evaluate the performance of an interface ?
  12. If my upstream system calls my interface, the concurrency is high , What should I do ?
  13. If you are sensitive to the upstream system delay ?
  14. What if the upstream system is the core application and can not limit the flow ?
  • Java performance optimization

  • Performance tuning practice

Ask the interviewer about the serial gun

HR:

  1. May I ask what time your company usually goes to and from work ?
  2. How many people are there in the technical team of your department ?
  3. How many people are your company going to recruit in the future ?
  4. Is it in a rising period of business ?
  5. It's said that your company's recent wind review is not very good , Is it true that ?
  6. There are other things on hand now offer, If you can give offer Words , Can you offer any more attractive terms ?
  7. Can you give us a brief introduction of the company's welfare ?

interviewer :

  1. I have no problem now , Do you have anything to ask me ?
  2. I'd like to ask you what kind of content you are responsible for now ?
  3. What is your department's current position in the company ?
  4. How many people are on your department team at present ?
  5. Do you have any challenging problems recently ?
  6. Has your department considered commercialization of this system ?
  7. What does the storage system do ,Mysql?
  8. Can you tell me the general content and process of the business you are responsible for ?
  9. Let me ask you the question of the interview. Do you have any ideas ?

Finally, let's have a look at the analysis of the real interview questions of large Internet companies ( With answers )

  • List of contents

Because the article is very long here , It can only be shown roughly in this way

At the end

At present, many novice programmers who have not entered the industry, including some junior programmers, may be misled by some comments on the Internet , Just like these :

In fact, the reason for these dilemmas is that they have not yet reached a high level , When you improve your ability , After climbing to a higher level , Both salary and development will be greatly improved . Now the speed of technology update is faster and faster , We programmers as a group stop learning and will be eliminated , This is a very real problem . If you are preparing for an interview or want to learn to improve yourself , Then this document will certainly help you . Need full HD PDF File partners just need to like the article , Follow me and add a little assistant to get 100% free !

 

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