Section 2.7 Unit 2 Summary

Subsection 2.7.1 Unit 2 Vocabulary

Review the following Unit 2 vocabulary:

Activity 2.7.1 2.1 Design Vocabulary.

Review the vocabulary in 2.1. Drag the vocabulary term from the left and drop it on its correct definition on the right. Click the "Check Me" button to see if you are correct.

Review the vocabulary in 2.1 and try again.

iterative development
developing a program through repeated cycles of design, implementation, and testing
incremental development
developing a program by in small steps adding new features or functionality
user research
the process of gathering information about users and their needs
program requirements
the specific needs and constraints that a program must meet to be successful
user stories
short, simple descriptions of a feature from the perspective of the user
storyboard
a visual representation of a sequence of events or scenes

Activity 2.7.2 2.1 Copyright Vocabulary.

Review the vocabulary in 2.1. Drag the vocabulary term from the left and drop it on its correct definition on the right. Click the "Check Me" button to see if you are correct.

Review the vocabulary in 2.1 and try again.

copyright
a legal right that protects the creator’s work from being used without permission
intellectual property
ownership for creations of the mind, like inventions, literary and artistic works
Creative Commons license
a type of license that allows creators to share their work with others while retaining some rights
open source software
software whose source code is available for anyone to view, modify, and distribute
Creative Commons Zero (CC0)
a license that waives all copyright and related rights in a work

Activity 2.7.3 2.2 Boolean Vocabulary.

Review the vocabulary in 2.2. Drag the vocabulary term from the left and drop it on its correct definition on the right. Click the "Check Me" button to see if you are correct.

Review the vocabulary in 2.2 and try again.

Boolean
a data type that can only have the values True or False
Boolean expression
an expression that evaluates to either True or False
relational operator
an operator like == or < that compares two values and returns True or False
logical operator
an operator like and, or, or not that combines Boolean expressions and returns True or False

Activity 2.7.4 2.3 Selection Vocabulary.

Review the vocabulary in 2.3 Selection. Drag the vocabulary term from the left and drop it on its correct definition on the right. Click the "Check Me" button to see if you are correct.

Review the vocabulary in 2.3 and try again.

selection
the process of choosing which statements to execute based on certain conditions
conditional statement
a statement that checks a condition and executes different code depending on whether the condition is true or false
else
a keyword used in conditional statements to specify code that should be executed if the condition is false
nested conditionals
conditional statements that are placed inside other conditional statements

Activity 2.7.5 2.4 Iteration Vocabulary.

Review the vocabulary in 2.4 Iteration. Drag the vocabulary term from the left and drop it on its correct definition on the right. Click the "Check Me" button to see if you are correct.

Find the words in the 2.4 Iteration lesson above and try again.

iteration
repetition of a sequence of instructions
while loop
a type of loop that continues as long as a condition is true
for loop
a type of loop that repeats a set of statements a specific number of times
loop variable
a variable that is used to control the number of iterations in a loop
infinite loop
a loop that never ends
tracing
the process of following the line by line keeping track of the variables and output.

Activity 2.7.6 2.5 Algorithms Vocabulary.

Review the vocabulary in 2.5 Algorithms. Drag the vocabulary term from the left and drop it on its correct definition on the right. Click the "Check Me" button to see if you are correct.

Review the words in the 2.5 lesson and try again.

sequencing
ordering instructions one after another
iteration
repetition of a sequence of instructions
selection
choosing which statements to execute based on certain conditions
algorithm
a step-by-step procedure for solving a problem
accumulator pattern
a loop with a variable that accumulates a sum or total
average
the sum of a set of numbers divided by the size of the set
minimum
the smallest value in a set of numbers
maximum
the largest value in a set of numbers
side effect
a change other than the output to the program’s state or variables when the program runs
divide and conquer pattern
an algorithm that divides the problem into smaller parts and solves each part

Activity 2.7.7 2.6 Errors Vocabulary.

Review the vocabulary in lesson 2.6 Errors. Drag the vocabulary term from the left and drop it on its correct definition on the right. Click the "Check Me" button to see if you are correct.

Find the words in the lesson 2.6 Errors and try again.

syntax error
an error caught by the interpreter because the rules of the programming language were not followed
logic error
an error in the code that causes it to produce incorrect results although it runs
runtime error
an error that occurs while the program is running
test cases
inputs used to check the correctness of an algorithm

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