Recently, a lot of friends went to the major Internet companies for interviews ( Alibaba , JD.COM , Byte runout , Ant gold suit , sound of dripping water ), I will be sent some interview questions after the interview . Some friends pass the test easily , Get it offer, But some of them came to me for answers .

I made a special arrangement , There are many problems that can't be explained in a few words , So I made a copy Java Core knowledge points to solve these interview questions . Many of the questions are simple , But the thinking and logic behind it is not simple , To know what it is, we need to know what it is .

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this PDF Content of :
Java,MyBatis,ZooKeeper,Dubbo,Elasticsearch,Memcached,Redis,MySQL,Spring,Spring
Boot,Spring Cloud,RabbitMQ,Kafka,Linux Etc. technology stack , Free collection at the end of the article

JVM

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thread

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JVM Memory area

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JVM Runtime memory

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Garbage collection and algorithm

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JAVA Four reference types

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GC Generational collection algorithm VS Partition collection algorithm

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GC garbage collector

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JAVA IO/NIO

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JVM Class loading mechanism

JAVA aggregate

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Interface inheritance and Implementation

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List

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ArrayList( array )

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Vector( Array implementation , Thread synchronization )

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LinkList( Linked list )

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Set

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HashSet(Hash surface )

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TreeSet( Binary tree )

JAVA Multithreading concurrency

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JAVA Concurrent knowledge base

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JAVA Thread implementation / How to create

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4 Thread pool

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Thread life cycle ( state )

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Terminate thread 4 Ways

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sleep And wait difference

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start And run difference

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JAVA Background thread

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JAVA lock

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Thread basic method 4.1.11. Thread context switch

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Synchronization lock and deadlock

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Thread pool principle

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JAVA Blocking queue principle

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CyclicBarrier,CountDownLatch,Semaphore Usage of

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volatile The role of keywords ( Variable visibility , Prohibit reordering )

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How to share data between two threads

JAVA Basics

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JAVA Exception classification and handling

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JAVA reflex

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JAVA annotation

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JAVA Inner class

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JAVA generic paradigm

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JAVA serialize ( Create reusable Java object )

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JAVA copy

Spring principle

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Spring characteristic

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Spring Core components

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Spring Common modules

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Spring Main package

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Spring Common notes

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Spring Third party integration

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Spring IOC principle

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Spring APO principle

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Spring MVC principle

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Spring Boot principle

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JPA principle

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Mybatis cache

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Tomcat framework

Microservice

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Service registration discovery

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API gateway

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Configuration center

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Event scheduling (kafka)

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Service tracking (starter-sleuth)

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Service fuse (Hystrix)

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Hystrix Breaker mechanism

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API Administration

Netty And RPC

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Netty principle

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Netty High performance

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Netty RPC realization

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key technology

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Core process

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Message encoding and decoding

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Communication process

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RMI Implementation mode

Distributed cache

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Cache avalanche

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Cache penetration

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Cache preheating

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Cache update

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Cache degradation

Zookeeper

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Zookeeper concept

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Zookeeper role

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Zookeeper working principle ( Atomic broadcasting )

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Znode There are four forms of directory nodes

Kafka

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Kafka concept

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Kafka Data storage design

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partition Data files for (offset,MessageSize,data)

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Data file segmentation segment( Sequential reading and writing , Segment command , Dichotomy search )

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Data file index ( Segmented index , Sparse storage )

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Producer design

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load balancing (partition Will be evenly distributed to different broker upper )

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Bulk send

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compress (GZIP or Snappy)

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Consumer Design

RabbitMQ

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RabbitMQ concept

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RabbitMQ framework

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Exchange type

algorithm

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Consistency algorithm

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Java algorithm

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data structure

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encryption algorithm

After reading the above , I believe you have a clear goal and direction , The next step is to find the learning materials , We have a set of systematic architect learning package for you and BAT Interview materials , For your reference , The contents and receiving methods of the learning package are as follows

Partial information display :

【 This is just a small part of it 】

Collection method

Scanning code plus QQ group :679716314

Collect materials free of charge

ps: The data will be updated regularly in the group every week .

Finally, I wish everyone who is about to change jobs and is already looking for a good job , I put these interview questions , Put it in mine Java Resource sharing group , There are all kinds of books in the group , There are also senior people in the group HR Can recommend work , Exchange technology with industry bulls , Welcome to exchange and study .

stamp “ Read the original ” You can also enter directly QQ Get interview materials free of charge !

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