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 】
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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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