Book Image

Mastering the Java Virtual Machine

By : Otavio Santana
Book Image

Mastering the Java Virtual Machine

By: Otavio Santana

Overview of this book

Mastering the Java Virtual Machine is a comprehensive guide that will take you into the heart of Java programming, guiding you through the intricate workings of the Java Virtual Machine (JVM) and equipping you with essential skills to become a proficient Java developer. You’ll start by understanding the JVM, exploring its architecture and how it executes Java code. Through detailed explanations and real-world examples, you’ll gain a deep understanding of JVM internals, enabling you to write efficient and optimized Java applications. As you progress, you’ll delve into memory management and execution, unraveling the complexities of heap and stack management, garbage collection, and memory profiling. You'll learn how memory is allocated and reclaimed in the JVM, as well as how to optimize memory usage and identify performance bottlenecks in your applications. With this knowledge, you’ll be able to create Java programs that are not only robust but also highly performant. By the end of this book, you’ll have the skills needed to excel in Java programming, writing efficient, maintainable code.
Table of Contents (19 chapters)
Free Chapter
1
Part 1: Understanding the JVM
5
Part 2: Memory Management and Execution
9
Part 3: Alternative JVMs
12
Part 4: Advanced Java Topics

Questions

Answer the following questions to test your knowledge of this chapter:

  1. What is the primary goal of ergonomics in JVM tuning?
    1. Minimizing code compilation time
    2. Automatically adjusting JVM configuration based on runtime characteristics
    3. Maximizing heap size for all applications
    4. Disabling garbage collection for enhanced performance
  2. Which GC is often chosen by ergonomics as the default for single-processor systems or when memory is limited?
    1. Serial GC
    2. Parallel GC
    3. G1 GC
    4. ZGC
  3. In the context of garbage collection, what does “multi-mapping” refer to?
    1. Multiple mapping of virtual memory addresses to physical memory
    2. The use of multiple garbage collection algorithms simultaneously
    3. Multithreading during garbage collection
    4. Allocating memory in multiple regions simultaneously
  4. Why might developers prefer manual GC configuration over ergonomics?
    1. Manual tuning is more cost-effective
    2. Ergonomics is not compatible with modern JVM versions
    3. Developers have better control over performance...