Received a remote interview invitation with byte skipping last week , heart startling and gallbladder trembling -- be deeply , I thought every minute would be killed by seconds , I didn't expect to let go of the interviewers （ Ouch ~ It's a little rusty ）, So I want to share this experience with you .
Total bytes 3 Face technology +1 Noodles HR, I am a little confused about which side asked what questions , But I remember that each knowledge point asked about those questions , Roughly divided into Java+Redis+Linux/ operating system + network + database + The six parts of the algorithm , Say something from the heart , The reason why this time can kill byte interviewers , I've worked hard, too , Stay up late every day and brush up questions to review （ It's still miserable ~）
ok , It's no nonsense to say so much , Let's have a look at the three aspects of knowledge !（ Let me show you how to review ）
Byte interview knowledge points ：Java+Redis+Linux/ operating system + network + database + algorithm
（1）Java
* JVM Memory area
* HashMap,CurrentHashMap
* String, StringBuffer, StringBuild Sanlian
* GC algorithm
* Why replication algorithms are needed 2 individual Survivor space , 1 Can't one
* survivor What if there is not enough space
* volatile effect
* synchronize bottom
* Re entry lock bottom /AQS bottom
* LRU Underlying implementation
（2）Redis
* Redis Object structure of
* Implement the underlying data structure of the object
* SDS advantage , Linked list , Implementation and complexity of hop table
* The bottom layer of ordered sets - Dictionary and skip table Why use these two structures
* Redis Why fast # Helping the poor in action #
* RDB AOF Advantages and disadvantages , How to choose ,
（3） database
* Mysql Indexes hash and btree What is the use of
* B+ Number advantage , Why not use red and black trees
（4）Linux/ operating system
* Switching between kernel mode and user mode
* see CPU Usage command
* select poll epoll Sanlian
* The role of virtual memory
* CPU L2 cache
（5） network
* From input url To display web page process , HTTPS Certification of , DNS Analytic process
* TCP Three handshakes , What's wrong with two handshakes
* TCP UDP difference
* TIME_WAIT effect
* How to quickly reuse TIME_WAIT Connection of ? Don't you understand?
（6） algorithm
* Sort a string Time requirement O(n)
* Maximum square area ( I can't change the topic )
* Odd ascending and even decreasing linked list sorting Space requirements O(1)
* Give an array with duplicate numbers , Find the set {(a,b,c) | a+b+c=0}
How do I review ?
（1） The first step Crazy supplement knowledge
* 《JAVA Collation of core knowledge PDF》 A collection by chance 28
* RDB AOF Advantages and disadvantages , How to choose ,
（3） database
* Mysql Indexes hash and btree What is the use of
* B+ Number advantage , Why not use red and black trees
（4）Linux/ operating system
* Switching between kernel mode and user mode
* see CPU Usage command
* select poll epoll Sanlian
* The role of virtual memory
* CPU L2 cache
（5） network
* From input url To display web page process , HTTPS Certification of , DNS Analytic process
* TCP Three handshakes , What's wrong with two handshakes
* TCP UDP difference
* TIME_WAIT effect
* How to quickly reuse TIME_WAIT Connection of ? Don't you understand?
（6） algorithm
* Sort a string Time requirement O(n)
* Maximum square area ( I can't change the topic )
* Odd ascending and even decreasing linked list sorting Space requirements O(1)
* Give an array with duplicate numbers , Find the set {(a,b,c) | a+b+c=0}
How do I review ?
（1） The first step Crazy supplement knowledge
Pay attention ： I said these review materials have been sorted into documents
* Brain maps of learning thinking （ Help you plan your study route ）
* 《JAVA Collation of core knowledge PDF》 A collection by chance 283 Page's PDF
include JVM,JAVA aggregate ,JAVA Multithreading concurrency ,JAVA Basics ,Spring principle , Microservices ,Netty And RPC, network , journal ,Zookeeper,Kafka,RabbitMQ,Hbase,MongoDB,Cassandra, Design patterns , load balancing , database , Consistent Hashing ,JAVA algorithm , data structure , encryption algorithm , Distributed cache ,Hadoop,Spark,Storm,YARN, machine learning , Cloud computing, etc 30 Chapters .
such as JVM：
For example, microservices ：
* Practical books （ A little bit ）
（2） Crazy problem writing
All the major topics are dead and crazy （ The following is a part of my brush problem information ~）
If you think my review materials are useful for you , Then you can share it for free
Remember !!!
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