Java Garbage Collection 面试题与答案
问题 1. What is Garbage Collection in Java?
Garbage Collection is the automatic process of reclaiming the runtime unused memory by destroying the objects that are no longer reachable or referenced by the program.
问题 2. Explain the purpose of the finalize() method.
The finalize() method is called by the garbage collector before reclaiming the memory occupied by an object. It can be overridden to perform cleanup operations before an object is garbage collected.
问题 3. What is the role of the JVM (Java Virtual Machine) in garbage collection?
The JVM is responsible for managing the memory, including garbage collection. It runs the garbage collector to identify and reclaim unused memory.
问题 4. Name the different types of garbage collectors in Java.
The types of garbage collectors in Java include Serial Garbage Collector, Parallel Garbage Collector, CMS (Concurrent Mark-Sweep) Garbage Collector, and G1 (Garbage-First) Garbage Collector.
问题 5. What is the purpose of the Young Generation in the Java heap?
The Young Generation is the part of the heap where new objects are created. It is designed for short-lived objects, and garbage collection occurs more frequently in this generation.
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- What is the purpose of the Young Generation in the Java heap?
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