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**English** ** Japanese** ** ** English**
- Recommended online reading (more experience, faster): javaguide.cn
- Interview surprise version (focus only, with fine PDF downloads): interview.javaguide.cn
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GitHub
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> - ** Large Model Field Project**: ⭐AI Smart Interview Support Platform + RAG Knowledge Base (based on Spring Boot 4.0 + Java 21 + Spring AI 2.0, well suited as a learning and curriculum vitae project with a low learning threshold).
> - ** interview supplement**:
> - Java Interview Point North: Four years of grinding, and JavaGuide's open-source content complement, to get you ready for interviews from scratch!
> - Back-end HF system design & scene question: 30+ DHF system design and scene interview to help you respond to the current trend of mid- and large-scale plant interviews.
> - ** used recommendation**: If you want to systematically prepare Java backend interviews but do not know how to start, you can refer to Java backend interview clearance scheme (general backend).
> - **Star**: If you think JavaGuide's content will help you, please order a free Star, which is my greatest encouragement, thank you all for your time together and for your time!
> - ** Reproduced in the annex**: all the following articles, if not the initial notes, are original JavaGuide, for which reference is made at the beginning. If malicious copying/handling is detected, legal weapons are used to defend their interests. Let's maintain a good technological environment!
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AI Application of development interview guide
AI application development for back-end developers, AI programming field and interview guidelines are open and cover core technical and engineering practices such as LLM, Agent, RAG, MCP, Claude Code, Codex. Welcome, Star!
-** Project address**: https://github.com/Snailclimb/AIGuide
** Online** https://javaguide.cn/ai/
Backend interview preparation
- Java backend interview clearance plan (covering the backend common system) (must see: +1:)
- How to efficiently prepare Java interview?
Java, back-end interview highlights.
Java Learning Route (update, 4w+ words)
- Guidelines for the preparation of curriculum vitae of programmers
- Project experience guide
- What if we get too nervous?
- What if the school admissions don't have an internship? What about an internship?
Java.
Foundation
** Summary of knowledge points/interviews** (must read: +1:):
- Java Basic Common Knowledge Point & Summary of Interviews (up)
- Java Basic Common Knowledge Points & Summary of Interviews (C)
Java Basic Common Knowledge Point & Summary of Interviews (under)
** Detailed key knowledge points**:
- Why is Java only worth passing?
- Java Sequenced Details
- Pan/Pyramid Details
- Java, reflect.
- Java proxy model.
BigDecimal.
- Java, magic, Unsafe.
- Java SPI Detailed Mechanism
- Java.
Gather.
** Summary of knowledge points/interviews**:
- Java Gathering Common Knowledge Points & Summary of Interviews (Previously: +1:)
- Java Gathering Common Knowledge Points & Summary of Interviews (low) (Required: +1:)
- Java, wrapping up the contents of the container.
**Source analysis**:
- ArrayList Core Source + Capability Mechanism Analysis
- LinkedList Core Source Analysis
- HashMap Core Source + Bottom Data Structure Analysis
- ConcurentHashMap Core Source + Bottom Data Structure Analysis
LinkedHashMap Core Source Analysis
- CopyOnWriteArrayList Core Source Analysis
- Array BrockingQueue Core Source Analysis
- Core source analysis for PriorityQueue
- DelayQueue Core Source Analysis
IO
- IO Basic summary
- IO Design Model Summary
- IO model details
NIO Core Knowledge Summary
Parallel
** Summary of knowledge points/interviews** (required: +1:)
- Java and a summary of common knowledge points and interviews (up)
- Java and a summary of common knowledge points and interviews (C)
- Java and a summary of common knowledge points and interviews (low)
** Detailed key knowledge points**:
- Java, lock. Break
- A lock on optimism and pessimism.
- CAS, details.
- JMM (Java Memory Model)
- ** Threadpool**: Java Thread Pool Detail, Java Thread Pool Best Practices
- ThreadLocal.
- Java, co-container summary.
- Atomic Atomic Summary
- AQS, details.
Completable Future.
JVM (must read: +1:)
This part of the JVM is based on JVM Virtual Machine Code-Java8 and Teacher Zhou Ji Minh ' s In-depth Understanding Java Virtual Machine (3rd edition) (recommended to read many times).
- ** Java Memory Area**
- **JVM Waste recycling**
- Class File Structure
-** Class loading process**
- Class loader
- The most important JVM parameter summary.
- I'll take you to JVM.
- JDK surveillance and trouble management tool
New Feature
- ** Java 8**: Java 8 New Character Summary (Translation), Java 8 Common New Character Summary
- Java 9 Overview of new features
- Java 10, Overview of new features
- Java 11, an overview of new features.
- Java 12 & 13 Overview of new features
- Java 14 & 15 Overview of new features
- Java 16, Overview of new features
- Java 17, a new profile.
- Java 18, a new profile.
- Java 19 Overview of new features
- Java 20, Overview of new features
- Java 21 Overview of new features
- Java 22 & 23 Overview of new features
- Java 24, Overview of new features
- Java 25 Overview of new features
Computer base
Operating systems
- Common knowledge points in operating systems & summary of interviews (up)
- Common knowledge points for operating systems & summary of interviews (low)
- Process and line details: distinction, state, communication, context switching and virtual lines Cheng
- IPC details: conduit, message queue, shared memory, Socket and Binder
- Death locks: four necessary conditions, Java, death locks, database death locks
- Detailed storage management in the operating system: break pages, segments, page replacements, Swap and OOM
- Virtual memory details: address conversion, TLB, missing page interruption and page replacement
- Operational system file system details: inode, VFS, Page Cache and log mechanisms
- I/O Multi-Role Detail: Self, Poll, Poll Principles and Differences
- Zero details: map, sendfile and splice
- ** Linux**:
- Linux Basic Summary for Backend Programmers
- Shell Programming Basics Summary
Network
** Summary of knowledge points/interviews**:
- Common knowledge points on computer networks & summary of interviews (up)
- Common knowledge points on computer networks & summary of interviews (down)
- Summary (additional) of Mr. Sheikyan ' s Computer Network
** Detailed key knowledge points**:
- OSI and TCP/IP network hierarchy model elaboration (basis)
- Summary of common application level protocols (appliance level)
- HTTP vs HTTPS (appliance level)
- HTTP 1.0 vs HTTP 1.1 (appliance level)
- HTTP Common Status Code (appliance level)
- DNS Domain Name System Details (Application Layer)
- TCP, three handshakes and four handshakes.
- What's the difference between TCP Kepalive and HTTP Keep-Alive? (transmitting layer)
- TCP Transfer Reliability Assurance (Transfer Layer)
- Yes, through Ping. TCP must be connected? (transmitting layer)
- TCP and UDP can use the same port? (transmitting layer)
- How many TCP connections can a host keep? (transmitting layer)
- ARP protocol detail (network level)
- NAT protocol details (network level)
- Summary of common means of cyberattack (security)
Data structure
** Graphical data structure:**
- Linear data structure: arrays, chains, bars, queues
- Figures.
- Pile.
- Trees: Focus on red trees, B-, B+, B\, LSM trees
Other commonly used data structures:
- Blom filter.
Algebra
This part of the algorithm is very important, if you don't know how to learn the algorithm, read me:
- Algorithmic learning books + resource recommendations.
- How do you do it?
**Summary of common algorithm issues**
- Several common string algorithms.
- A few common chain algorithms.
- Sword finger offer part programming.
- Ten classic sorting algorithms.
Also, GeeksforGeeks, a website that summarizes common algorithms, is more comprehensive.
Database
Foundation
- Database fundamentals summary
- NoSQL Basic knowledge summary
- Character Encapsulation
-SQL:
- Summary of basic knowledge of SQL
SQL Summary of Common Interviews
MySQL
** Summaries of knowledge points/interviews:**
-** MySQL Common Knowledge Point & Summary of Interviews** (Must read: +1:)
- MySQL Summary of high performance optimization normative recommendations
** Key knowledge points:**
MySQL index details
- MySQL Index Expiry Summary
- MySQL service level details
- MySQL three logs (binlog, redo log and undo log)
- MySQL Backup and Restore Detail
- InnoDB storage engine for MVCC
- Implementation of SQL statements in MySQL
- MySQL query cache
MySQL Implementation Plan Analysis
- MySQL Self-Additional Primary Key must be continuous?
- MySQL time-type data storage proposal
- MySQL implicit conversion causes index failure
Redis.
** Summary of knowledge points/interviews** (must read: +1:):
- Redis Common Knowledge Points & Summary of Interviews (above)
- Redis Common Knowledge Point & Summary of Interviews (low)
** Key knowledge points:**
- 3 Common Cache Reading and Writing Strategies
- Redis, can you do the news line? How?
- Redis 5 detailed basic data structure
- Redis 3 Special Data Structure Detailed
- Redis, the mechanism for durability.
- Redis memory debris analysis
- Redis, summary of common obstructions.
- Redis, cluster.
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