AP Computer Science Unit 3

User Interface

The inputs and outputs that allow a user to interact with a piece of software. User interfaces can include a variety of forms such as buttons, menus, images, text, and graphics.

Input

Data that are sent to a computer for processings by a program. Can come in a variety of forms, such as tactile interaction, audio, visuals, or text.

Output

Any data that are sent from a program to a device. Can come in a variety of forms, such as tactile interaction, audio, visuals, or text.

Program Statement

A command or instruction. Sometimes also referred to as a code statement.

Program

A collection of program statements. Programs run (or “execute”) one command at a time.

Sequential Programming

Program statements run in order, from top to bottom. There is no user interaction and the code runs the same way every time.

Event Driven Programming

Some program statements run when triggered by and event, like a mouse click or a key press. Programs run differently each time depending on user interactions.

Debugging

The process of finding and fixing problems in a code.

Documentation

A written description of how a command or piece of code works or was developed.

Comment

Form of program documentation written into the program to be read by people and which do not affect how a program runs.

4 Steps for Debugging

Describe the Problem, Hunt for Bugs, Try Solutions, Document as you go

Pair Programming

A collaborative programming style in which two programmers switch between the roles of writing code and tracking or planning high level progress.