Ali Java successfully developed and upgraded P6 in four aspects, bitter experience and learning ideas

Enter her 2020-11-09 16:11:21
ali java successfully developed upgraded


 

End of autumn move , from 5 Start to review in the middle of the month ,7 I started to submit my resume in January , Until now , Take a brief note of , What I want to share with you today is that I was lucky to get Ali offer Interview experience of a friend of mine , The epidemic has just improved , I believe there are many friends who work online , I have nothing to do , Some real questions about my friend Ali's interview , And some of the real questions I've compiled to share with you .

Here's a list of recent BAT The latest interview questions ,2020 The new version of the ship !! Friends in need can : Click here !! Code open source !. I hope those in need can find a satisfactory job in the first wave of recruitment this year !


Ali side (60 minute ): Speed Of Soon , It basically covers all the regular examination points

  • Project situation ,redis, Message middleware , Data consistency , Distributed session, Implement distributed session The way ( except redis The third party ), Login process
  • redis effect , Deletion policy , colony , Cache breakdown
  • spring The cycle of dependence ,spring bean Life cycle of , Transaction propagation level
  • Introduce common collections ,Arrayslist,hashmap,hashset etc.
  • Common concurrent package classes
  • What are the common sorts of , Talk about the Hill sort , Why fast ?
  • Introduction to mangrove , Properties of red-black trees , How the red and black trees rotate
  • mysql, Index structure B+ Trees ,hash Indexes , How to solve slow queries , What is the situation when the index is not used ,sql Statement execution flow , Implementation of overlay index
  • virtual machine , Class loading mechanism , Garbage collector ,cms,ps Use scenarios
  • int integer difference ( Memory location )
  • Computer networks shake hands three times , Four waves ,ddos At what stage of the attack

I added a written test that night :1. Given a string , Please arrange the characters in the string in descending order of frequency .2. The longest unrepeated string is very simple. It's been written in half an hour


Ali on both sides (70 minute ): Talk to the interviewer Of Very happy. , In particular, the last talk about learning methods , life , I'm so talkative

  • The five layers of the computer network , Seven tier protocol
  • udp/tcp The difference between , What kind of wechat is used
  • Introduction to quicksort
  • I can't remember ( It's all basic knowledge , It's all answered ) It's simple
  • How do you usually study ?

Three sides of Ali (35 About minutes ): A casual chat , I gave it on the spot , Tell me to prepare for the follow-up interview

  • Self introduction. , Project introduction
  • Distributed session,redis How to improve the access rate
  • Security md5 Encryption process
  • say something redis( This paper introduces single thread , Multiplexing , A master-slave mode , Sentinel mode , Cluster pattern ,rdb,aof Persistence process )
  • Introduction to quicksort , Analyze time complexity , How to improve ?

All around Ali (40 minute )

  • Occupation planning
  • You are right about java What are the suggestions for the future version ?
  • If it's you , How do you design a garbage collector , How to reduce fullGC Time
  • An article , I'm going to put it hash To a space , You can use fingerprints to save and decrypt , How do you design ?

Knowledge to prepare

Here are some more impressive questions in recent interviews , There will be no branches , Because it doesn't make sense , Roughly classify and record , At present, I only think of so many , But it's important to know that these problems are just the tip of the iceberg , Even if it's all there, it's not going to work , The most important , Or a solid foundation , A clear mind .

By the way, I have arranged a copy for you 《Java Summary of interview 》, It includes Java Basic knowledge of , Assembly containers , Concurrent programming ,JVM, Common open source framework Spring,MyBatis, database , Middleware etc. , Included as a Java Most of the knowledge that an engineer needs or may use in an interview .

If you need this full version of the interview notes , Three companies support , You can get information for free —— After three companies ( promise :100% free )
Quick start channel : Backstage private message 【 e-book 】!
Sorting is not easy to , Feel helpful friends can help, like to share support ~
Your support , My motivation ; I wish you a bright future ,offer constantly !!!

4 Face Ali Java Successful R & D, landing and grading P6, Bitter talk about bitter experience and learning ideas

 

Structure design interview questions :

  1. Please list in JDK Several common design patterns in ?
  2. What is design pattern ? Have you ever used any design patterns in your code ?
  3. Static proxy .JDK Dynamic agents and CGUB A dynamic proxy
  4. Static proxy
  5. Dong Jie's agent
  6. cglib generation t The reason is
  7. The singleton pattern
  8. Factory mode
  9. Observer mode
  10. Decorator mode
  11. Seckill system design
  12. Distributed
  13. Distributed Overview
  14. Distributed
  15. colony
  16. Microservices
  17. Multithreading
  18. High concurrency
  19. Distributed system design concept
  20. The goals and elements of distributed systems
  21. Two ideas of distributed system design : Centralization and decentralization
  22. What is the difference between distributed and clustered ?
  23. CAP Theorem
  24. CAP Proof of Theorem
  25. BASE theory
  26. BASE The core idea of the theory
  27. BASE Three elements of theory
  28. 1. Basic available
  29. 2. Soft state
  30. 3. The final consistency of quantity
  31. Data structure and algorithm
  32. Bubble sort
  33. Selection sort
  34. Quick sort
  35. recursive
  36. Two points search
  37. Uniformity Hash Algorithm

Java Basic knowledge interview questions :

  1. Java Is there any goto
  2. final What's the usage? ?
  3. final finally finalize difference
  4. this Keyword usage
  5. super Keyword usage
  6. this And super The difference between
  7. static The main meaning of being
  8. static What's unique about
  9. static Application scenarios
  10. static matters needing attention
  11. Flow control statement
  12. break ,continue ,return The difference and function of
  13. stay Java in , How to jump out of the current multiple nested loop
  14. object-oriented
  15. Object-oriented overview
  16. The difference between object-oriented and process oriented
  17. Three characteristics of object-oriented
  18. What are the features of object-oriented
  19. What is polymorphism mechanism ? Java How language realizes polymorphism ?
  20. What are the five basic principles of object orientation ( Optional )
  21. Comparison of abstract classes and interfaces
  22. What are the differences between ordinary and abstract classes ?
  23. Abstract classes can be used final Embellishment ?

Spring Interview questions (2020 The latest version )

  1. Spring The design goal of the framework , Design concept , And what the core is
  2. Spring What are the advantages and disadvantages of ?
  3. Spring What are the application scenarios
  4. Spring Which modules are composed of ?
  5. Spring What design patterns are used in the framework ?
  6. Explain the core container in detail (spring context Application context ) modular
  7. Spring What are the different types of events in the framework
  8. Spring What are the different components of an application ?
  9. Use Spring What are the ways ?
  10. Spring Inversion of control (IOC) (13)
  11. What is? Spring I0C Containers ?
  12. Inversion of control (loC) What's the role
  13. I0C What are the advantages of ?
  14. Spring loC Implementation mechanism
  15. Spring Of IoC What functions are supported
  16. BeanFactory and ApplicationContext What's the difference? ?
  17. Spring How to design containers ,BeanFactory and AplicationContext The pass of This is a detailed explanation of
  18. ApplicationContext What is the usual implementation ?
  19. What is? Spring Dependency injection of ?
  20. The basic principles of dependency injection
  21. What are the advantages of dependency injection
  22. What are the different types of dependency notes , Such as the way of implementation ?
  23. Constructor dependency injection and Setter Differences in method injection
  24. Spring Beans (19)
  25. What is? Spring beans?
  26. - individual Spring Bean What does the definition contain ?
  27. How to give Spring Container provides configuration metadata ? Spring There are several configurations

Message middleware MQ And RabbitMQ Interview questions (2020 The latest version )

  1. Why use MQ? MQ The advantages of
  2. What are the advantages and disadvantages of message queues ? RabbitMQ What are the advantages and disadvantages ?
  3. What message middleware is used in your company's production environment ?
  4. Kafka、ActiveMQ、 RabbitMQ、 RocketMQ What are the advantages and disadvantages ?
  5. MQ What are the common problems ? How to solve these problems ?
  6. What is? RabbitMQ?
  7. rabbitmq Usage scenarios of
  8. RabbitMQ Basic concepts
  9. RabbitMQ Working mode of
  10. How to ensure RabbitMQ The order of the message ?
  11. How messages are distributed ?
  12. How to route messages ?
  13. What transmission is the message based on ?
  14. How to ensure that messages are not consumed repeatedly ? Or say , How to ensure the idempotency of message consumption ?
  15. How to ensure that messages are sent to RabbitMQ? How to ensure that the message receiver consumes the message ?
  16. How to ensure RabbitMQ Reliable transmission of messages ?
  17. Why shouldn't all of message All use persistence mechanism ?
  18. How to ensure high availability ? RabbitMQ The cluster of
  19. How to solve the problem of message queue delay and expiration ? What to do when the message queue is full ? There are millions of messages that keep piling up for hours , Talk about how to solve ?
  20. Design MQ Ideas

Java virtual machine (JVM) Interview questions (2020 The latest version )

  1. Java Memory area
  2. The way JVM The main components and functions of ?
  3. The way JVM Run time data area
  4. Deep copy and light copy
  5. Talk about the difference between stacks ?
  6. What are queues and stacks ? What's the difference? ?
  7. HotSpot Exploring virtual machine objects
  8. Object creation
  9. Allocate memory for objects
  10. Dealing with concurrency security issues
  11. Object access location
  12. Handle access
  13. Direct Pointers
  14. Memory overflow exception
  15. Java Is there a memory leak ? Please give us a brief description
  16. Garbage collector
  17. sketch Java Garbage collection mechanism
  18. GC What is it? ? Why GC
  19. Advantages and principles of garbage collection . And think about 2 A recycling mechanism
  20. What is the basic principle of garbage collector ? The garbage collector can be . Reclaim memory on ? What is the way to inform virtual machine of garbage collection ?
  21. Java What are the reference types in ?
  22. How do you determine if an object can be recycled ?
  23. stay Java in , When can objects be garbage collected
  24. JVM Will garbage collection occur in persistent code in
  25. The way JVM What are the garbage collection algorithms ?

Spring Interview questions (2020 The latest version )

  1. Java Memory area
  2. The way JVM The main components and functions of ?
  3. The way JVM Run time data area
  4. Deep copy and light copy
  5. Talk about the difference between stacks ?
  6. What are queues and stacks ? What's the difference? ?
  7. HotSpot Exploring virtual machine objects
  8. Object creation
  9. Allocate memory for objects
  10. Dealing with concurrency security issues
  11. Object access location
  12. Handle access .
  13. Direct Pointers
  14. Memory overflow exception
  15. Java Is there a memory leak ? Please give us a brief description
  16. Garbage collector
  17. sketch Java Garbage collection mechanism
  18. GC What is it? ? Why GC
  19. Advantages and principles of garbage collection . And think about 2 A recycling mechanism
  20. What is the basic principle of garbage collector ? Can the garbage collector reclaim memory immediately ? What is the way to inform virtual machine of garbage collection ?
  21. Java What are the citations | Use type ?
  22. How do you determine if an object can be recycled ?
  23. stay Java in , When can objects be garbage collected
  24. JVM Will garbage collection occur in persistent code in
  25. The way JVM What are the garbage collection algorithms ?
  26. Mark - Clear algorithm
  27. Copy algorithm

Interview tips

Include Java Basic knowledge of , Assembly containers , Concurrent programming ,JVM, Common open source framework Spring,MyBatis, database , Middleware etc.

1、 Ali P8 It's written by Daniel 283 page Java Core knowledge

4 Face Ali Java Successful R & D, landing and grading P6, Bitter talk about bitter experience and learning ideas

 

4 Face Ali Java Successful R & D, landing and grading P6, Bitter talk about bitter experience and learning ideas

 

2、 Interview treasure

Interview review guide 、 Brushing before the interview will help you a lot !

4 Face Ali Java Successful R & D, landing and grading P6, Bitter talk about bitter experience and learning ideas

 

3、 More architecture topics and videos are shown below :

4 Face Ali Java Successful R & D, landing and grading P6, Bitter talk about bitter experience and learning ideas

 


Due to space limitation ,《Java Summary of interview 》(PDF) The details are too comprehensive , There are so many details , So just edit the chapter of part of the module, a brief introduction , Each chapter has more detailed content in the node !

If you need this full version of the interview notes , Three companies support , You can get information for free —— After three companies ( promise :100% free )
Quick start channel : Click here !! Code open source !
Sorting is not easy to , Feel helpful friends can help, like to share support ~
Your support , My motivation ; I wish you a bright future ,offer constantly !!!

 
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