current position：Home>Crazy blessing! Tencent boss's "million JVM learning notes", real topic of Huawei Java interview 2020-2021
Crazy blessing! Tencent boss's "million JVM learning notes", real topic of Huawei Java interview 2020-2021
2021-08-21 14:22:23 【be on call】
summary + Java Technical system +Java The history of +Java Virtual machine family ：（Sun Classic/Exact VM、HotSpot VM、Mobile/Embedded VM、BEA JRockit/IBM J9 VM、BEA Liquid VM/Azul VM、Apache Harmony/Google Android Dalvik VM、Microsoft JVM And others ）+ expectation Java The future of Technology + actual combat ： Compile it yourself JDK
Java Memory area and memory overflow exception ： Run time data area ：（ Program counter +Java Virtual machine stack + Native Method Stack + Java Pile up + Method area + Runtime constant pool + Direct memory ）tSpot Exploring virtual machine objects + actual combat ：OutOfMemoryError abnormal （Java Heap overflow + Virtual machine stack and local method stack overflow + Method area and runtime constant pool overflow + Local direct memory overflow ）
** Garbage collector and memory allocation strategy ：** The object is dead. ？+ Garbage collection algorithm +HotSpot The algorithm details of the implementation of + The classic garbage collector + Low latency garbage collector + Choose the right garbage collector + actual combat ： Memory allocation and recycling strategy
** Virtual machine performance monitoring 、 Troubleshooting tools ：** Basic troubleshooting tools + Visual fault handling tool +HotSpot Virtual machine plug-ins and tools
** Tuning case analysis and practice ：** case analysis ：（ Program deployment strategy on large memory hardware + Memory overflow caused by synchronization between clusters + Overflow error due to out of heap memory + External commands cause the system to slow down + The server virtual machine process crashed + Improper data structure leads to excessive memory consumption + from Windows Long pause caused by virtual memory + Long pause caused by safety point ）
** Class file structure ：** The cornerstone of irrelevance +Class Class file structure + Introduction to bytecode instruction + Public design , Private implementation +Class The development of document structure
** Virtual machine class loading mechanism ：** Class load time + The process of class loading + Class loader +Java Modular system
VM bytecode execution engine ：? Runtime stack frame structure + Method call + Dynamic type language support + Stack based bytecode interpretation execution engine
** Class loading and execution subsystem cases and actual combat ：** case analysis ：( Tomcat： The orthodox classloader Architecture + OSGi： Flexible classloader Architecture + Bytecode generation technology and implementation of dynamic proxy +Backport Tools ：Java Your time machine )+ actual combat ： Do it yourself to realize remote execution function
** Front end compilation and optimization ：**Javac compiler +Java The taste of grammar sugar （ Generic + Automatic boxing 、 Unpacking and traversing cycle + Conditional compilation ）+ actual combat ： Plug in annotation processor
** Back end compilation and optimization ：** Just in time compiler + Ahead of time compiler + Compiler optimization technology + In depth understanding of Graal compiler
**Java Memory model and thread ：** Efficiency and consistency of hardware +Java Memory model （ Main memory and working memory + Inter memory interaction + about volatile Special rules for type variables + in the light of long and double Special rules for type variables + Atomicity 、 Visibility and order + Antecedent principle ）+Java With threads （ Implementation of threads +Java Thread scheduling + State transition ）+Java With the process
Getting familiar with Ali's interview questions in previous years in advance must be of great help to the interview , But as a technical profession , Having solid skills in hand is the most useful weapon for you to face the interviewer , This is self-confidence emanating from the inside .
The most time I spent preparing for Ali was learning technology , It accounts for... Percent of all my study plans 70, These are some learning notes that I think are very good during my study , And learning videos are You can click here for free Of ！
Why should I write this article , In fact, I think learning can't stop , Share with you on the Internet , Discuss together , You can't just meet more of the same people , You can broaden your horizons , Learn more technology , I will be in csdn、 Blog 、 Share technology on websites such as nuggets , This is also a way of learning .
I'll share it with you today , Thank you for your attention , I will share more dry goods to you in the future ！
author[be on call],Please bring the original link to reprint, thank you.
The sidebar is recommended
- BEM - a front-end CSS naming methodology
- Another ruthless character fell by 40000, which was "more beautiful" than Passat and maiteng, and didn't lose BMW
- CSS learning notes - Flex layout (Ruan Yifeng tutorial summary)
- Zheng Shuang's 30th birthday is deserted. Chen Jia has been sending blessings for ten years. Is it really just forgetting to make friends?
- Asynchronous solution async await
- Installing Vue devtool for chrome and Firefox
- Basic usage of JS object
- Front end Engineering - scaffold
- Array de duplication problem solution - Nan recognition problem
guess what you like
New choice for app development: building mobile applications using Vue native
Less than 200000 to buy a Ford RV? 2.0T gasoline / diesel power, horizontal bed / longitudinal bed layout can be selected
Front end, netty framework tutorial
The wireless charging of SAIC Roewe rx5 plus is so easy to use!
Left hand IRR, right hand NPV, master the password of getting rich