Pub Quiz - Specialist Topic "Basic Java"

What is the purpose of garbage collection? retrieve memory that is no longer in use gather terminated methods into one area in memory store old values for variables that have been changed backup the stack to the heap backup the heap to the stack	When does garbage collection occur? whenever the developer initiates it at regular scheduled intervals whenever a method exits whenever a class constructor is called whenever the JVM decides it should
If overriding equals method, should also ... implement equalsIgnoreCase method overload hashcode method override hashcode method implement Comparable interface overload equals method	An object consists of ... classes and messages attributes and variables methods and classes variables and methods classes and interfaces
Keyword used to instantiate object of a class ... static new object assert instantiate	How can you reference instance variables? using the static keyword using dot notation using the new keyword using the = operator instance variables can't be referenced
Keyword to create new class that inherits from another extends implements inherits super is-a	Allow access to a member of a superclass from subclass? new extends implements sub super
Purpose of overridding a method? replace a subclass method in the superclass replace a superclass method in the subclass to extend the subclass to mark the superclass as final to mark the subclass as final	Class from which all Java classes are utimately derived? Super Sub Window Object Class