Writing Classes in AP Computer Science A

Static methods can access and change the values of static variables

Static methods cannot access or change the values of static variables

Static methods can change the values of static variables, but not access them

Static methods can access the values of static variables, but not change them

The constructor of the class.

An instance method of the class.

An instance variable of the class.

A static variable of the class.

It requires an object to be instantiated before it can be used.

It can be called on a class rather than an instance of the class.

Its behavior changes every time it is called with different arguments.

It cannot access other static methods within its class.

It depends on its access modifier.

No, they never do.

Yes, they always do.

It depends on its return type.

A variable that can only be accessed by static methods.

A variable that changes every time an object is created.

A variable that is shared among all instances of a class.

A constant value that cannot be modified after declaration.

Resets its value every time an object is instantiated.

Shared by all instances of the class.

Exists only within a method's scope.

Holds data specific to one instance of the class.

Counter.count

count

Class.count

Counter()->count

To restrict access to the variable from other classes in the package.

To allocate extra memory for storing multiple copies of the variable.

To allow the variable to be shared by all instances of the class.

To mark the variable for garbage collection after method execution.

Memory usage increases due to added overhead for managing static access across instances.

Memory usage decreases since one shared copy replaces many individual copies of the variable.

Memory becomes fragmented as both static and non-static versions coexist during transition phases.

Memory usage remains unchanged as each instance still requires unique memory allocation for variables.

You get a compilation error.

A runtime exception is thrown.

The code runs but returns null for the field.

The field becomes static automatically.