Notes features: clear and organized, with graphical representations that are easier to understand.
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!
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JAVA collection
- Interface inheritance and implementation
- List
- ArrayList (array)
- Vector (array implementation, thread synchronization)
- LinkList (linked list)
- Set
- HashSet(Hash表)
- TreeSet (binary tree)
JVM
JVM is the java virtual machine. It is a fictitious computer that can simulate the functions of various computers on the actual computer. JVM has its own complete hardware structure, such as processor, stack and register, etc., and also has a corresponding instruction system.
- Thread
- JVM memory area
- JVM runtime memory
- Garbage collection and algorithms
- JAVA four reference types
- GC generational collection algorithm VS partition collection algorithm
- GC garbage collector
- JAVA IO / NIO
- JVM class loading mechanism
JAVA multi-threaded concurrency
- JAVA Concurrent Knowledge Base
- JAVA thread implementation / creation method
- 4 types of thread pools
- Thread life cycle (state)
- 4 ways to terminate threads
- The difference between sleep and wait
- The difference between start and run
- JAVA background thread
- JAVA lock
- Basic thread method 4.1.11. Thread context switch
- Synchronization and deadlock
- Principle of Thread Pool
- JAVA blocking queue principle
- Usage of CyclicBarrier, CountDownLatch, Semaphore
- The role of the volatile keyword (variable visibility, prohibit reordering)
- How to share data between two threads
Spring principle
- Spring features
- Spring core components
- Spring common modules
- Spring main package
- Spring common annotations
- Spring third-party integration
- Spring IOC principle
- Spring APO principle
- Spring MVC principle
- Spring Boot principle
- JPA principle
- Mybatis cache
- Tomcat architecture
Microservice
When it first entered the software industry, it was a single application era. The concept of front-end and back-end separation has not yet been popularized. During development, 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 claim to be a microservice architecture?
- What do you know about microservices?
- What are the advantages of microservice architecture?
- What are the characteristics of microservices?
- What are the best practices for designing microservices?
- How does the microservice architecture work?
- What are the advantages and disadvantages of the microservice architecture?
- Monolithic, what is the difference between SOA and microservice architecture?
- What challenges do you face when using microservice architecture?
- What are the main differences between SOA and microservice architecture?
- What is cohesion?
- What is coupling?
- What is REST / RESTful and what is its purpose?
Netty 与RPC
- Netty principle
- Netty high performance
- Netty RPC implementation
- Key technology
- Core process
- Message codec
- Communication process
- RMI implementation
The internet
- 7-layer network architecture
- TCP/IP principle
- TCP three-way handshake/four waved hands
- HTTP principle
- CDN principle
- Distribution Service System
- Load balancing system
- Management system
Log
- Slf4j
- Log4j
- LogBack
- Logback advantages
- ELK
Kafka
- Kafka concept
- Kafka data storage design
- Data files of partition (offset, MessageSize, data)
- Data file segmentation (sequential read and write, segment command, binary search)
- Data file index (segment index, sparse storage)
- Producer design
- Load balancing (partitions will be evenly distributed to different brokers)
- Batch send
- Compression (GZIP or Snappy)
- 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 any 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 doesn't the service launch affect the old version?
- What protocol does Dubbo recommend?
Hbase
- Hbase concept
- Columnar storage
- Hbase core concept
- Hbase core architecture
- Hbase write logic
- HBase vs Cassandra
- MongoDB
- MongoDB concept
- MongoDB features
Cassandra
- Cassandra concept
- Data model
- Cassandra consistent hash and virtual node
- Gossip protocol
- Data replication
- Data write request and coordinator
- Data read request and background repair
- Data storage (CommitLog, MemTable, SSTable)
- Secondary index (a RowKey is generated for the summary of the value to be indexed)
- Data read and write
Design Patterns
- Design Principles
- Factory method pattern
- Abstract factory pattern
- Singleton mode
- Builder mode
- Prototype mode
- Adapter mode
- Decorator mode
- Agency model
- Appearance mode
- Bridge mode
- Combination mode
- Flyweight model
- Strategy mode
- Template method pattern
- Observer mode
- Iterative subpattern
- Chain of Responsibility Model
- Command mode
- Memo mode
database
- Storage engine
- index
- Three paradigms of database
- The database is a transaction
- Stored procedure (a set of SQL statements for a specific function)
- Trigger (a program that can be executed automatically)
- Database concurrency strategy
- Database lock
- Distributed lock based on Redis
- Classification table
- Two-phase commit agreement
- Three-phase commit agreement
- Flexible transaction
- CAP
Consensus algorithm
- Paxos
- Oats
- Raft
- NWR
- Gossip
- Consistency Hash
- Consistent Hash feature
- Consistency Hash principle
JAVA algorithm
- Binary search
- Bubble sort algorithm
- Insertion sort algorithm
- Quick sort algorithm
- Hill sorting algorithm
- Merge sort algorithm
- Bucket sorting algorithm
- Radix sorting algorithm
- Pruning algorithm
- Backtracking algorithm
- Shortest path algorithm
- Largest array algorithm
- Longest Common Subsequence Algorithm
- Minimum spanning tree algorithm
data structure
- Stack
- Queue
- Link
- Hash Table
- Sorted binary tree
- Red black tree
- B-TREE
- bitmap
Hadoop
- Hadoop concept
- HDFS
- Client
- NameNode
- Secondary NameNode
- DataNode
- MapReduce
- JobTracker
- TaskTracker
- Task
- Reduce Task execution process
- The life cycle of Hadoop MapReduce jobs
- Job submission and initialization
- Task scheduling and monitoring.
- Task operating environment preparation
- Task execution
- Homework completed
Spark
- Spark concept
- Core architecture
- Core components
- SPARK programming model
- SPARK calculation model
- SPARK operation process
- SPARK RDD process
- SPARK RDD
Storm
- Storm concept
- Cluster architecture
- Nimbus (master-code distribution to Supervisor)
- Supervisor (slave-manages the start and termination of the Worker process)
- Worker (process that specifically handles component logic)
- Task
- ZooKeeper
- Programming model (spout->tuple->bolt)
- opology operation
- Storm Streaming Grouping
- ResourceManager
- NodeManager
- ApplicationMaster
- YARN operation process
cloud computing
- SaaS
- PaaS
- IaaS
- Docker
- Openstack
- Namespaces
- Process (process isolation implemented by CLONE_NEWPID)
- Libnetwork and network isolation
- Resource isolation and CGroups
- Mirroring and UnionFS
- 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 space is not allowed, the following screenshots are used to show it. If you need to get information and documents, you can click on the portal ! !