Recently, I have sorted out some interview questions and answers in my article. I hope you can master the core knowledge of virtual machines in the question-oriented process. Interview is an interview after all, we still have to master the core knowledge, come on ~~~

Below is a summary of some JVM learning related to interviews, broken down by JVM virtual machine knowledge. The typical Interview question for a Java programmer is Java memory area, virtual machine garbage algorithm, virtual garbage collector, AND JVM memory management. These references to chapters 2 and 3 of this week’s In-depth Understanding of the Java Virtual Machine will suffice for the following in-depth understanding of the Java memory region of a virtual machine: and in-depth understanding of virtual machine garbage collection.

Github address (welcome star and pull) : github.com/Snailclimb/…

Understanding the Java memory region of a virtual machine:

  1. Introduce the Java memory area (runtime data area).
  2. Object access location in two ways.

In-depth understanding of virtual machine garbage collection

  1. How to tell if an object is dead (two ways).
  2. This section briefly introduces strong references, soft references, weak references, and virtual references (the differences between virtual references and soft references and weak references, and the benefits of using soft references).
  3. What are the algorithms for garbage collection and their characteristics?
  4. Why HotSpot is divided into new generation and old generation?
  5. What are the common garbage collectors?
  6. Introduce the CMS,G1 collector.
  7. What’s the difference between the Minor AND Full Gc?

Vm performance monitoring and troubleshooting tools

  1. What are the common command-line tools for JVM tuning?

In-depth understanding of file structures such as virtual machines

  1. A brief introduction to the Class file structure (what are the two main constants in the constant pool? How is the inheritance of a Class file determined? What information do field tables, method tables, and property tables mainly contain?

In-depth understanding of virtual machine class loading mechanism

  1. A brief description of the class loading process. What does it do?
  2. Do you know anything about class loaders?
  3. What is the parental delegation model?
  4. How the parental delegation model works and the benefits of using it.

In-depth understanding of virtual machine bytecode execution engines for virtual machines

Welcome to my wechat official account :”Java Interview Clearance Manual “(a warm wechat official account, looking forward to common progress with you ~~~ adhere to the original, share beautiful articles, share a variety of Java learning resources) :