Classes that contain abstract and concrete methods, and serve as blueprints to sub-classes. Classes can only implement one abstract class.

Classes that contain only abstract methods, and serve as contracts that other classes must follow when implementing. Classes can implement multiple interfaces.

the process of writing methods that, although having the same name, result in different actions from references (robots)

what gives computers information about where to build objects. Marked with = ex: UrRobot Karel = new UrRobot(1, 3, East, -1);

variables created in classes to execute methods.

separated blocks of code that can contain methods, constructors, objects, and references. Classes can be public or private, and extend or implement something.

public = can be seen and used by other classes private= is exclusive to that class, cannot be re-used

objects that return or produce nothing.

the issue of calling methods from objects that are null. You will receive this error.

code that sets limitations and expectations of objects. Ex: (int street, int avenues, Direction direction, int beepers) int = integers

breaking complex problems into smaller problems, which require simpler solutions

additional information that is sent to an object that can have any type

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AP COMPSCI

Question	Answer
Abstract classes	Classes that contain abstract and concrete methods, and serve as blueprints to sub-classes. Classes can only implement one abstract class.
Interfaces	Classes that contain only abstract methods, and serve as contracts that other classes must follow when implementing. Classes can implement multiple interfaces.
polymorphism	the process of writing methods that, although having the same name, result in different actions from references (robots)
references	what gives computers information about where to build objects. Marked with = ex: UrRobot Karel = new UrRobot(1, 3, East, -1);
objects	variables created in classes to execute methods.
classes	separated blocks of code that can contain methods, constructors, objects, and references. Classes can be public or private, and extend or implement something.
public and private	public = can be seen and used by other classes private= is exclusive to that class, cannot be re-used
null	objects that return or produce nothing.
NullPointerException	the issue of calling methods from objects that are null. You will receive this error.
Constructers	code that sets limitations and expectations of objects. Ex: (int street, int avenues, Direction direction, int beepers) int = integers
OOP	Object Oriented Programming
Step-Wise refinement	breaking complex problems into smaller problems, which require simpler solutions
parameters	additional information that is sent to an object that can have any type

Created by: user-1979518

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