1. Computer basics:
1.1 Data structure basis:
Main learning:
1. Vector, linked list, stack, queue and heap, dictionary. Familiar with
2. tree, binary search tree. Familiar with
3. Graphs, directed graphs, undirected graphs, basic concepts
4. Familiar with binary search categories A, B, and C, familiar with 9 sorts.
5. The front, middle and back of the tree, levels, zigzags, the shortest path.
6. KMP and other string algorithms.
1.2 Operating system:
Main learning:
1. Process, thread, process thread difference. Inter-process communication
2. Process scheduling algorithm understanding
3. Storage, virtual memory, paging segmentation, memory scheduling algorithm
4. File system, chain, index
5. Deadlock: cause, avoid, release k
6. Linux basic operating commands, Know a script programming: shell, Python
1.3 Computer network:
Main learning:
1. Network layering: five layers, seven layers, four layers, etc.
2. Network layer: IP classification, subnet division, supernet. ARP protocol, ICMP protocol. Understand internal gateways and external gateways, vpn, etc.
3. Transport layer: port, UDP protocol understanding, TCP protocol understanding, three handshake, four disconnections.
4. Application layer: understand the ports and underlying protocols used by common protocols.
5. Deeper understanding: TCP/IP controls congestion, sliding windows, how to achieve reliability, etc.
1.4 Basic algorithm:
Main learning:
1. Understand the big O and other symbols
2. Dynamic programming such as: It is best to have ready-made codes for written tests for several types of backpack problems. The longest common subsequence
3. Greedy algorithm: understand Huffman coding (concept of written test frequently)
4. B tree B+ tree is used to understand database index
5. Commonly used graph algorithms: breadth first, depth first, shortest path algorithm (the shortest Good ready-made code), minimum spanning tree.
2. JAVA knowledge base:
2.1JAVA basics
Recommended books: programming ideas
1. Master java common technologies, io, multi-threading, reflection, common collection framework
2. Familiar with IO processing input and output, used for written tests
3. Know Iterator, Iterable and Comparable, Comparator, and commonly used Traversal and sorting of collections.
4. Be familiar with NIO, as well as understand JMS and RPC
5. Be familiar with basic concepts of JAVA, such as the difference between abstract classes and interfaces, etc., remember these by heart.
2.2 JAVA source code
1. Hashmap, hashtable, concurrentHashMap source code and differences
2. Other collection frameworks: linkedHashMap, LinkedHashSet, Copy-On-Write, etc.
3. Understand the source code of Lock, Object, String, etc.
2.3 JAVA Concurrent API
Recommended books: Coping with written interviews: JAVA multi-threaded programming and core technology. The true book: JAVA concurrent programming practice.
The difference and usage of Synchronize and Lock
2.wait () and await () notify () and signal (), wait () and sleep () difference and usage
3. Other API usage: yield, join, etc.
4. Voliate in-depth understanding, and CAS understanding
5. JAVA lock bottom layer realization: spin lock, blocking lock, reentrant lock, bias lock, etc.
6. Thread pool and blocking queue
7. And some common concurrent implementation cases such as producer and consumer
2.4 Understand JVM
Recommended books: in-depth understanding of JAVA virtual machine
1. JAVA memory model, which content is stored in which area
2. Citing technology method and accessibility analysis method
3. The difference and function of strong, soft, weak and virtual references of objects
4. JVM garbage collection mechanism, and recycling algorithm
5. Common causes and solutions of OOM and SOF, and what tools to analyze.
6. Familiar with common JVM input parameters
7. Understand GC pause, escape analysis, TLAB area, off-heap memory, etc.
8. Common garbage collectors: G1, CMS, etc.
9. Understand common performance monitoring tools: such as visualvm jconsole, etc.
10. Must be familiar with the virtual machine class loading mechanism, including the principle steps, and the principle of parent delegation.
3. Regular reserve knowledge learning
3.1 Database:
Recommended books: Introduction to sql: Mysql must know and know. In-depth understanding: high-performance Mysql
1. Commonly used related query syntax, a few handwritten by yourself
2. In-depth knowledge and understanding of database indexes
3.JDBC learning
4. Common database tuning methods: such as index tuning
5. The difference between InnoDB and MyISAM
6. Understand the primary key, foreign key, index, unique index
7. Understand indexes, views, triggers, cursors and stored procedures
8. Commonly used relational databases and non-relational databases: Relational understanding: Mysql, Oracle Non-relational understanding: redis, Hbase, monogodb, etc.
3.2 Design pattern:
Zen of Design Patterns
1. Several writing methods of singleton mode must be known
2. Corresponding design patterns in the JDK: such as the decoration pattern and the adapter pattern in IO
3. Commonly used design patterns in the framework: such as the chain of responsibility pattern in Struts, the factory pattern in Spring, the dynamic proxy pattern, etc.
4. Understand the 6 design principles
3.3 HTTP protocol:
The definitive guide to HTTP
1. What is HTTP, protocol version, etc.
2. Learn to use a browser to view HTTP requests and responses
3. Familiar with HTTP request header and request body
4. Familiar with HTTP response headers and response bodies
5. Understand Rest style
3.4 God-like Spring:
Spring actual combat and Spring technology insider
1. Understand the principle and function of IOC
2. Understand the principles and functions of AOP
3. Commonly used XML configuration
4. Spring transaction principle and use
5.SpringMVC
6. Understand Spring webflow, remote service, rest, messaging, security, etc.
7. New features: Spring boot and cloud
4. The road to back-end learning
4.1 WEB back-end learning road
You can choose some SSH integration development and the like
1. JSP and Servlet learning
2. XML and JSON parsing learning
3. Front-end knowledge: HTML, css, js
4. JDBC learning, file upload/download, JAVAMail, etc.
5. Can use jsp and Servlet to develop simple projects
6. Then frame learning: Struts2, Hibernate, Spring and mutual integration development
7. Then you can understand: SpringMvc, Mybatis, Lucene, shiro, etc.
8. Use the framework to implement simple projects such as CMS.
4.2 The road to service architecture learning (this part of the written test interview may not be learned)
Principle and practice of distributed service framework and microservice design
1. Understand SOA and microservices
2. Load balancing: LVS, NGINX, etc.
3. RPC framework learning: RMI, Thrift, etc.
4. Message framework learning: ActiveMq, etc.
5. Netty communication framework learning
6. Service framework: dubbo
4.3 Hadoop learning road (this part of the written test interview may not be learning)
The definitive guide to Hadoop
1. Familiar with mapReduce and HDfS
2. Hadoop cluster construction
3. Understand: zk, hive, hbase, pig, mahout, etc.
4. Zk has several common functions such as being a registration center, putting configuration information, etc.
Alibaba Cloud internal tutorial
SSM enterprise-level combat
Big data analysis
Interview Collection
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