Lesson 1 PLTW Computer Science
Terms in this set (25)
Procedural abstraction gives a name to a procedure. People can then use the procedure without worrying about the finer grain details.
Analog information has continuous values instead of jumping from one value to another value without passing through the values in between. Most physical information such as position, wind speed, light intensity, or sound pressure, is analog.
The values that a program provides to a function.
When two parties exchange information so that they trust that each other is who they say they are
Backlog A prioritized list of features or user stories to add to a program
Binary information is written using only two values: zero and one. Everything can be approximately represented using a binary representation.
A Boolean expression is either True or False. Boolean operators include "and," "or," and "not."
Any single typeset unit, including uppercase and lowercase letters, digits, punctuation marks, international characters like letters with Ümläüts, and special characters like tabs and carriage returns.
Parts of an interface
A problem solving strategy of breaking a problem apart into smaller subproblems
A default value is a value that a variable will have if no action is taken by the user.
Digital information has discrete values with gaps between the values. Digital information can be exactly represented using a binary representation. Digital information can be duplicated exactly, without loss in quality. Digital information can be transmitted error-free.
To determine the result of an expression.
An action that triggers an event handler to be executed, such as user input or a timer's alarm
A part of a program that runs when an event occurs
Information provided to the computer from a person or from another computer, through input devices such as the keyboard, mouse, or touch screen
The way a human interacts with a computer through the input and output
Information sent by the computer to a person or to another computer, through output devices such as a display or printer, speaker, or motor
The component of a computer that follows instructions
A variable that stores information about an object
Any value that a method or function gives back to the statement command from which the function or method is called
The portion of a program that knows about a variable. In App Inventor, variables are either global (known by the blocks in a screen) or local (known by the blocks in a procedure or for loop.
Sprint task list
A list of small steps to accomplish, breaking down a user story from the backlog
A sequence of characters.
Voltage is the energy difference per electron between two locations. The energy can be converted to kinetic energy when electrons fall from low voltage to high voltage.
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