Ali, byte, Tencent and interview questions are all covered. This Java interview document is too strong

Mr. Ma Bing 2021-01-21 02:04:00
ali byte tencent interview questions


Preface

【Java Study + Interview guide 】 One covers most Java The core knowledge that programmers need to master

This Github The content of the project is also very comprehensive . With JVM For example :

  1. Java Memory area
  2. JVM Garbage collection
  3. JDK Monitoring and troubleshooting tools
  4. Class file structure
  5. Class loading process
  6. Class loader
  7. 【 To be completed 】 The most important JVM Parameter guide ( The translation is half perfect )
  8. JVM Configure common parameters and common GC Tuning strategy
  9. 【 snacks 】 Great vernacular brings you to know JVM

As a Java The programmer , You're always stuck in business development , I'm busy typing code every day , Go to system development , Down to Bug modify , You feel like you can do anything . But an occasional party , You've heard that the students who started their career together have already got their annual salary 50 ten thousand , But I'm shy in my pocket . So you want to see new opportunities , Find a new platform , Develop well .

But during the interview , When the smiling interviewer asks what you're familiar with Java The question is , You just feel familiar , But how can't answer the point . such as HashMap How it works , Or volatile Usage scenarios of .

This is the time , You may doubt your ability , I also hate why I didn't review well at the beginning .

The new version of the document is in Github I've been up for a week 30K+star Of Java Core interview magic ( This parameter , I don't need to say more about the quality ) Very comprehensive , Inclusion Java Basics 、Java aggregate 、JavaWeb、Java abnormal 、OOP、IO And NIO、 Reflection 、 annotation 、 Multithreading 、JVM、MySQL、MongoDB、Spring Family bucket 、 computer network 、 Distributed architecture 、Redis、Linux、git、 front end 、 Algorithm and data structure 、MyBatis、RocketMQ、Netty、Dubbo、Zookeeper、 Distributed cache 、 Data structure and so on are very rich , Has helped a lot of people take over the Internet first-line companies offer. Now let me share with you .

If you need to get it, please click three times and then look at the wechat of the little assistant below :(vip1024x) Add and you can get it for free

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Java aggregate / Generic

  • ArrayList and linkedList The difference between
  • HashMap and HashTable The difference between
  • Collection Package structure , And Collections The difference between
  • Common features of generics ( To be added )
  • say something List,Set,Map Differences among the three
  • Array And ArrayList What's different ?
  • Map What are the characteristics of
  • Set memory in Java.util In bag , How many are there Kind of interface
  • What is? list Interface
  • say something ArrayList( Array )

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Due to the fact that there are too many details in the document, only part of the knowledge points of the chapter are edited, and a rough introduction to , There are more detailed contents in each chapter ! Here is a list of some chapters , Due to the limited length of the headlines, the detailed explanations in the table of contents can not be listed one by one , At the end of the article, you can get all the details of the following chapters .

Java abnormal

  • Java What are the two types of exceptions in ?
  • There are several handling mechanisms for exceptions ?
  • How to customize an exception
  • try catch fifinally,try Are there in return,finally Is it still implemented ?
  • Excption And Error Package structure
  • Thow And thorws difference
  • Error And Exception difference ?
  • error and exception What's the difference?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Java Medium IO And NIO

  • Java in IO flow ?
  • Java IO And NIO The difference between
  • Commonly used io What are the classes
  • The difference between byte stream and character stream
  • Blocking IO Model
  • Non blocking IO Model
  • Multiplexing IO Model
  • Signal driven IO Model
  • asynchronous IO Model
  • JAVA NIO

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Java Reflection

  • Besides using new Besides creating objects , How else can you create objects ?
  • Java Reflection is more efficient in creating objects through new It's efficient to create objects ?
  • java The effect of reflection
  • Where is the reflection mechanism used ?
  • How reflection is implemented :
  • Realization Java Reflective class :
  • Advantages and disadvantages of reflection mechanism :
  • Java Reflection API
  • Reflection steps ( obtain Class object 、 Call object method )
  • obtain Class There are several ways for objects
  • Using reflection to dynamically create object instances

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Java serialize

  • What is? java serialize , How to achieve java serialize ?
  • preservation ( Persistence ) Object and its state to memory or disk
  • Serialized objects are kept in byte arrays - Static members do not save
  • Serialize user remote object transfer
  • Serializable Implement serialization
  • writeObject and readObject Custom serialization strategy
  • serialize ID
  • Serialization does not hold static variables
  • Transient Keyword prevents the variable from being serialized into a file
  • serialize ( deep clone One is to realize )

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Multithreading & Concurrent

JAVA Concurrent knowledge base

  • Java There are several ways to implement multithreading in
  • Inherit Thread class
  • Realization Runnable Interface .
  • ExecutorService、 Callable、 Future There are return value threads
  • A thread pool based approach
  • 4 Thread pool
  • How to stop a running thread
  • notify() and notifyAll() What's the difference? ?
  • sleep() and wait() What's the difference? ?
  • volatile What is it? ? Can order be guaranteed ?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

JVM

  • java Is there a memory leak in , Please give us a brief description .
  • 64 position JVM in ,int The length of ?
  • Serial And Parallel GC Differences between ?
  • 32 Bit and 64 Bit JVM,int The length of type variable is majority ?
  • Java in WeakReference And SoftReference The difference between ?
  • JVM Options -XX:+UseCompressedOops What's the role ? Why use
  • How to pass Java Procedure to judge JVM yes 32 position still 64 position ?
  • 32 position JVM and 64 position JVM The maximum heap memory of is most ?
  • JRE、JDK、JVM And JIT What's the difference between ?
  • explain Java Heap space and GC?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Mysql

  • Database storage engine
  • InnoDB(B+ Trees )
  • TokuDB( Fractal Tree- Node with data )
  • Memory
  • What are the database engines
  • InnoDB And MyISAM The difference between
  • Indexes
  • Common indexing principles are
  • What are the three paradigms of a database
  • First normal form (1st NF - All columns are inseparable )

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Redis

  • What is? Redis?
  • Redis And others key-value What's the difference between storage ?
  • Redis Data type of ?
  • Use Redis What are the benefits ?
  • Redis comparison Memcached What are the advantages ?
  • Memcache And Redis What are the differences ?
  • Redis Single process, single thread ?
  • What is the maximum capacity of a string type intelligent storage ?
  • Redis Persistence mechanism
  • Cache avalanche 、 Cache penetration 、 Cache preheating 、 Cache update 、 Cache degradation and other issues

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Memcached

  • Memcached What is it? , What's the role ?
  • memcached What are the application scenarios of services in the enterprise cluster architecture ?
  • Memcached How to realize service distributed cluster ?
  • Memcached What are the service characteristics and working principles ?
  • sketch Memcached Principle of memory management mechanism ?
  • memcached How does it work ?
  • memcached What is the biggest advantage ?
  • memcached and MySQL Of query
  • memcached And the server local cache( such as PHP Of APC、mmap Documents, etc. ) comparison , What are the advantages and disadvantages ?
  • memcached Of cache What is the mechanism ?
  • memcached How to implement redundancy mechanism ?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

MongoDB

  • mongodb What is it? ?
  • mongodb What are the characteristics of ?
  • What you said NoSQL What does database mean ?NoSQL And RDBMS What's the direct difference ? Why use and not use NoSQL database ? say NoSQL Several advantages of database ?
  • NoSQL What are the types of databases ?
  • MySQL And MongoDB What is the basic difference between ?
  • How do you compare MongoDB、CouchDB And CouchBase?
  • MongoDB Be the best NoSQL What's the reason for the database ?
  • journal Play back in item (entry) When incomplete ( For example, there happened to be a midway fault ) Is there a problem ?
  • The analyzer is in MongoDB What is the role of ?
  • Namespace (namespace) What is it? ?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Spring

  • Different versions Spring Framework What are the main functions ?
  • What is? Spring Framework?
  • list Spring Framework The advantages of .
  • Spring Framework What are the different functions ?
  • Spring Framework How many modules are there in , What are they respectively ?
  • What is? Spring The configuration file ?
  • Spring What are the different components of an application ?
  • Use Spring What are the ways ?
  • What is? Spring IOC Containers ?
  • What is dependency injection ?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Spring Boot

  • What is? Spring Boot?
  • Why use SpringBoot
  • Spring Boot What are the advantages ?
  • Spring Boot Which is the core annotation of ? Which annotations does it consist of ?
  • function Spring Boot What are the ways
  • How to understand Spring Boot Medium Starters?
  • How to be in Spring Boot Run some specific code at startup ?
  • Spring Boot Do you need a separate container to run ?
  • Spring Boot What is the monitor in ?
  • How to use Spring Boot Implement exception handling ?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Spring Cloud

  • What is? Spring Cloud?
  • Use Spring Cloud What are the advantages ?
  • What does service registration and discovery mean ?Spring Cloud How to achieve ?
  • What's the point of load balancing ?
  • What is? Hystrix? How does it achieve fault tolerance ?
  • What is? Hystrix Circuit breaker ? Do we need it ?
  • What is? Netflix Feign? What are its advantages ?
  • What is? Spring Cloud Bus? Do we need it ?
  • What is microservice
  • What is service fusing ? What is service degradation

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

RabbitMQ

  • What is? rabbitmq
  • Why use rabbitmq
  • Use rabbitmq Scene
  • How to ensure that messages are sent to RabbitMQ? How to ensure that the message receiver consumes the message ?
  • How to avoid repeated delivery or consumption of messages ?
  • What transmission is the message based on ?
  • How messages are distributed ?
  • How to route messages ?
  • How to ensure that messages are not lost ?
  • Use RabbitMQ What are the benefits ?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Dubbo

  • Why use Dubbo?
  • Dubbo What are the layers of the overall architecture design of ?
  • What communication framework is used by default , Is there any other choice ?
  • Is the service call blocking ?
  • What kind of registration center do you usually use ? Is there any other choice ?
  • What serialization framework is used by default , What else do you know ?
  • What is the principle of service provider's failure ?
  • How can the service go online without affecting the old version ?
  • How to solve the problem of too long service call chain ?
  • What are the core configurations ?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

MyBatis

  • What is? Mybatis?
  • Mybaits The advantages of
  • MyBatis Disadvantages of the framework
  • MyBatis The frame is suitable for
  • MyBatis And Hibernate What are the differences ?
  • {} and ${} What's the difference ?
  • When the property name in the entity class is different from the field name in the table , What do I do ?
  • Fuzzy query like How to write a sentence ?
  • Usually a Xml The mapping file , I can write a Dao The interface corresponds to it , Excuse me, , This Dao How does the interface work ?Dao Methods in the interface , When the parameters are different , Can methods be overloaded ?
  • How to get auto generated ( Lord ) Key value ?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

ZooKeeper

  • What is? Zookeeper?
  • Zookeeper How to ensure the distributed consistency ?
  • ZooKeeper What is offered ?
  • Zookeeper file system
  • ZAB agreement ?
  • Four types of data nodes Znode
  • Zookeeper Watcher Mechanism -- Data change notice
  • Client registration Watcher Realization
  • Server-side processing Watcher Realization
  • Client callback Watcher

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

data structure

  • Stack (stack)
  • queue (queue)
  • Linked list (Link)
  • Hash table (Hash Table)
  • Sort binary trees
  • Prefix tree
  • Red and black trees
  • B-TREE
  • Bitmap

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Elasticsearch

  • elasticsearch To understand how much , Talk about your company es Cluster architecture of , Index data size , How many pieces are there , And some Tuning Tools .
  • elasticsearch What is the inverted index of
  • elasticsearch What to do if there is too much index data , How to tune , Deploy
  • elasticsearch How to achieve master Elected
  • Describe in detail Elasticsearch The process of Indexing Documents
  • Describe in detail Elasticsearch The search process ?
  • Elasticsearch At deployment time , Yes Linux What are the optimization methods for the setting of
  • lucence What is the internal structure ?
  • Elasticsearch How to achieve Master Elected ?
  • Elasticsearch The nodes in the ( For example 20 individual ), Among them 10 I chose one master, in addition 10 One chose the other master, What do I do ?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Kafka

  • Kafka What is it?
  • partition Data files for (offset, MessageSize, data)
  • Data file segmentation segment( Sequential reading and writing 、 Segment command 、 Two points search )
  • Load balancing (partition Will be evenly distributed to different broker On )
  • Bulk delivery
  • Compress (GZIP or Snappy)
  • Consumer Design
  • Consumer Group
  • How to get topic A list of topics
  • What is the command line for producers and consumers ?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Microservices

  • What are the advantages of microservice architecture ?
  • What are the characteristics of microservices ?
  • What's the best time to design microservices ?
  • How does microservice architecture work ?
  • What are the advantages and disadvantages of microservice architecture ?
  • monolithic ,SOA What's the difference with microservice architecture ?
  • When using microservice architecture , What are your challenges ?
  • SOA What is the main difference between and microservice Architecture ?
  • What are the characteristics of microservices ?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

Linux

  • What is the symbol of absolute path ? Current directory 、 What does the upper directory mean ? What is the home directory for ? What is the command to switch directories ?
  • How to view the current process ? How to execute exit ? How to view the current path ?
  • How to clear the screen ? How to exit the current command ? How to perform sleep ? How to check when
  • Ls What function does the command perform ? What parameters can I take , What's the difference? ?
  • What are the commands to view the file
  • List a few commonly used Linux command
  • How do you check the log ?
  • Build soft links ( Shortcut ), And hard link commands
  • What is the command for directory creation ? What command is used to create a file ? What's the command for copying files ?
  • See what commands are available for the contents of the file ?

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

 

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

interview , Difficult or not ? The final result is good or bad ? Depends on the interviewer's background ( Air field + Skill )、 Mindset and cognitive and communication skills . And some of the major Internet companies are interviewing ( Alibaba 、 JD.COM 、 Meituan 、 sound of dripping water ) You need to show your ability in the interview , So as to gain the appreciation and affirmation of the interviewer .

And programmers need to go through layers of interviews when applying . It is said that , Sharpening a knife never misses a woodcutter , Preparing for the interview can help you better deal with the interviewer's questions and the unexpected situations in the interview .

Because of space limitation ,pdf The detailed information of the document is too comprehensive , There are so many details , Therefore, only a partial screenshot of the knowledge points is provided for a rough introduction , Each small node has more detailed content ! There's a program in need ( Yuan )

If you need to get it, please click three times and then look at the wechat of the little assistant below :(vip1024x) Add and you can get it for free

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

 Ali , byte , tencent , The interview questions cover , This a Java The interview documents are too strong

Terror : This Github Fairy interview notes , It's almost all Java Knowledge interview questions are written out

版权声明
本文为[Mr. Ma Bing]所创,转载请带上原文链接,感谢
https://javamana.com/2021/01/20210121020248201p.html

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