20 Questions
What happens when a class is loaded into memory?
A static object is created immediately
How are static variables different from non-static variables?
Static variables have a single instance while non-static variables have multiple instances
What is the default value for an uninitialized static variable of type double?
Which keyword do you use to declare a static variable in a class?
static
How can you refer to a class's static variables inside the class?
By using their names directly
What is the key difference between ordinary variables and static variables in Java?
Ordinary variables are bound to objects of the class, while static variables are bound to the class's static object.
In Java, how can you access a static variable defined in a class from another class?
By using the class name followed by the static variable name
What happens to static variables when the Java machine finishes loading a class?
They are stored in the static object of the class
What is the memory organization difference between static and non-static variables immediately after loading a class in Java?
Static variables have their own memory space, while non-static variables share memory space with instances of the class
What is a characteristic of accessing ordinary (non-static) variables in Java?
They can only be accessed using an object reference to an instance of the class
What happens when a class is loaded into memory in Java?
A static object is created immediately and stores static class variables
What is the default value for an uninitialized static variable of type boolean in Java?
false
How can you access a static variable defined in a class from another class in Java?
By using the class name followed by the dot operator and then the variable name
What is the characteristic of accessing ordinary (non-static) variables in Java?
They can only be accessed through an instance of the class
What is the key difference between ordinary variables and static variables in Java?
Static variables always have an assigned value while ordinary variables can remain uninitialized
What is the key difference between an ordinary (non-static) variable and a static variable in Java?
Ordinary variables are unique to each instance of the class, while static variables are shared across all instances of the class
How are static variables different from non-static variables in terms of memory organization immediately after loading a class in Java?
Non-static variables have memory allocated for each instance of the class, while static variables have memory allocated only once for the entire class
Which keyword do you use to declare a static variable in a class?
static
What happens to static variables when the Java machine finishes loading a class?
They remain unchanged and continue to exist throughout the program's execution
In Java, how can you access a static variable defined in a class from another class?
By writing the name of the class followed by the variable name without creating an instance of the class
Test your knowledge about static variables and their behavior in Java classes. Understand the concepts of static object creation and storage, as well as the difference between static and non-static variables.
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