Wall crack recommended! The full version of the 888-page Java notes is available for download by Ali Million Architects, absolutely dry!

Author notes: from P8-class architect Ali: Chao Pengfei (real name is not a stage name!)

Note-taking features: Clearly organized, easy to understand with graphical representation.

Content summary: Including Java collections, JVM, multithreading, concurrent programming, design patterns, Spring family bucket, Java, MyBatis, ZooKeeper, Dubbo, Elasticsearch, Memcached, MongoDB, Redis, MySQL, RabbitMQ, Kafka, Linux, Netty, Tomcat, etc. Dachang interview questions etc., wait for the technology stack!

Since the entire document is relatively comprehensive, the content is relatively large, and the length is not allowed, the following is a screenshot. If you need to get information, you can privately mail me [ notes ] in the background after the three-linked article or see the following for free.

JAVA collection

1. Interface inheritance and implementation
2. List
3. ArrayList (array)
4. Vector (array implementation, thread synchronization)
5. LinkList (linked list)
6. Set
7. HashSet（Hash表）
8. TreeSet (binary tree)

 

 

JVM

JVM is the java virtual machine, it is a fictitious computer, which can simulate various computer functions on the actual computer. JVM has its own complete hardware structure, such as processor, stack and register, etc., as well as corresponding instruction system.

1. Thread
2. JVM memory area
3. JVM runtime memory
4. Garbage collection and algorithms
5. JAVA four reference types
6. GC generational collection algorithm VS partition collection algorithm
7. GC garbage collector
8. JAVA IO / NIO
9. JVM class loading mechanism

 

 

JAVA multithreaded concurrency

1. JAVA Concurrent Knowledge Base
2. JAVA thread implementation / creation method
3. 4 types of thread pools
4. Thread life cycle (state)
5. 4 ways to terminate threads
6. The difference between sleep and wait
7. The difference between start and run
8. JAVA background thread
9. JAVA lock
10. Basic thread method 4.1.11. Thread context switch
11. Synchronization and deadlock
12. Principle of Thread Pool
13. JAVA blocking queue principle
14. Usage of CyclicBarrier, CountDownLatch, Semaphore
15. The role of the volatile keyword (variable visibility, prohibit reordering)
16. How to share data between two threads

 

 

Spring principle

1. Spring features
2. Spring core components
3. Spring common modules
4. Spring main package
5. Spring common annotations
6. Spring third-party integration
7. Spring IOC principle
8. Spring APO principle
9. Spring MVC principle
10. Spring Boot principle
11. JPA principle
12. Mybatis cache
13. Tomcat architecture

 

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Microservice

When it first entered the software industry, it was still a single application era. The concept of front-end and back-end separation has not yet been popularized. When developing, it takes a lot of time to spend a lot of time on the "powerful" JSP. At that time, SOA was already considered a new technology. Now that microservices have become popular, is there any Internet product that does not call itself a microservice architecture?

1. What do you know about microservices?
2. What are the advantages of microservice architecture?
3. What are the characteristics of microservices?
4. What are the best practices for designing microservices?
5. How does the microservice architecture work?
6. What are the advantages and disadvantages of the microservice architecture?
7. Monolithic, what is the difference between SOA and microservice architecture?
8. What challenges do you face when using microservice architecture?
9. What are the main differences between SOA and microservice architecture?
10. What is cohesion?
11. What is coupling?
12. What is REST / RESTful and what is its purpose?

 

 

Netty 与RPC

1. Netty principle
2. Netty high performance
3. Netty RPC implementation
4. Key technology
5. Core process
6. Message codec
7. Communication process
8. RMI implementation

 

The internet

1. 7-layer network architecture
2. TCP/IP principle
3. TCP three-way handshake/four waved hands
4. HTTP principle
5. CDN principle
6. Distribution service system
7. Load balancing system
8. Management system

 

 

Log

1. Slf4j
2. Log4j
3. LogBack
4. Logback advantages
5. ELK

 

 

Kafka

1. Kafka concept
2. Kafka data storage design
3. Data file of partition (offset, MessageSize, data)
4. Data file segmentation (sequential read and write, segment command, binary search)
5. Data file index (segment index, sparse storage)
6. Producer design
7. Load balancing (partitions will be evenly distributed to different brokers)
8. Batch send
9. Compression (GZIP or Snappy)
10. Consumer design

 

 

Dubbo aspect

• Why use Dubbo?
• What are the layers of Dubbo's overall architecture design?
• What communication framework is used by default, are there other options?
• Is the service call blocking?
• What registry is generally used? Are there other options?
• What serialization framework is used by default, and what else do you know?
• What is the principle that the service provider can achieve the failure kick-out?
• Why does the service launch not affect the old version?
• What protocol does Dubbo recommend?

 

Hbase

1. Hbase concept
2. Columnar storage
3. Hbase core concept
4. Hbase core architecture
5. Hbase write logic
6. HBase vs Cassandra
7. MongoDB
8. MongoDB concept
9. MongoDB features

 

 

Cassandra

1. Cassandra concept
2. Data model
3. Cassandra consistent hash and virtual node
4. Gossip protocol
5. Data replication
6. Data write request and coordinator
7. Data read request and background repair
8. Data storage (CommitLog, MemTable, SSTable)
9. Secondary index (a RowKey is generated for the value summary to be indexed)
10. Data read and write

 

Design Patterns

1. Design Principles
2. Factory method pattern
3. Abstract factory pattern
4. Singleton mode
5. Builder mode
6. Prototype mode
7. Adapter mode
8. Decorator mode
9. Agency model
10. Appearance mode
11. Bridge mode
12. Combination mode
13. Flyweight model
14. Strategy mode
15. Template method pattern
16. Observer mode
17. Iterative subpattern
18. Chain of Responsibility Model
19. Command mode
20. Memo mode

 

database

1. Storage engine
2. index
3. Three paradigms of database
4. Database is transaction
5. Stored procedures (set of SQL statements for specific functions)
6. Trigger (a program that can be executed automatically)
7. Database concurrency strategy
8. Database lock
9. Distributed lock based on Redis
10. Classification table
11. Two-phase commit agreement
12. Three-phase commit agreement
13. Flexible transaction
14. CAP

 

 

Consensus algorithm

1. Paxos
2. Oats
3. Raft
4. NWR
5. Gossip
6. Consistency Hash
7. Consistent Hash feature
8. Consistency Hash principle

 

 

JAVA algorithm

1. Binary search
2. Bubble sort algorithm
3. Insertion sort algorithm
4. Quick sort algorithm
5. Hill sorting algorithm
6. Merge sort algorithm
7. Bucket sorting algorithm
8. Base sorting algorithm
9. Pruning algorithm
10. Backtracking algorithm
11. Shortest path algorithm
12. Largest array algorithm
13. Longest Common Subsequence Algorithm
14. Minimum spanning tree algorithm

 

 

data structure

1. Stack
2. Queue
3. Link
4. Hash Table
5. Sorted binary tree
6. Red black tree
7. B-TREE
8. bitmap

 

 

Hadoop

1. Hadoop concept
2. HDFS
3. Client
4. NameNode
5. Secondary NameNode
6. DataNode
7. MapReduce
8. JobTracker
9. TaskTracker
10. Task
11. Reduce Task execution process
12. The life cycle of Hadoop MapReduce jobs
13. Job submission and initialization
14. Task scheduling and monitoring.
15. Task operating environment preparation
16. Task execution
17. Homework completed

 

 

Spark

1. Spark concept
2. Core architecture
3. Core components
4. SPARK programming model
5. SPARK calculation model
6. SPARK operation process
7. SPARK RDD process
8. SPARK RDD

 

 

Storm

1. Storm concept
2. Cluster architecture
3. Nimbus (master-code distribution to Supervisor)
4. Supervisor (slave-manages the start and termination of the Worker process)
5. Worker (process that specifically handles component logic)
6. Task
7. ZooKeeper
8. Programming model (spout->tuple->bolt)
9. opology operation
10. Storm Streaming Grouping
11. ResourceManager
12. NodeManager
13. ApplicationMaster
14. YARN operation process

 

 

cloud computing

1. SaaS
2. PaaS
3. IaaS
4. Docker
5. Openstack
6. Namespaces
7. Process (process isolation implemented by CLONE_NEWPID)
8. Libnetwork and network isolation
9. Resource isolation and CGroups
10. Mirroring and UnionFS
11. Storage driver

 

 

Due to space limitations, the detailed information of the document is too comprehensive and there are too many details, so only some of the knowledge points are screenshots for a rough introduction, and each small node has more detailed content! The following is a screenshot of the catalog:

 

Since the entire document is relatively comprehensive, the content is relatively large, and the length is not allowed, the following is a screenshot. If you need to obtain information, you can scan the following article for free directly after three consecutive articles.

The following is a video explanation of the java architecture interview: