AP CSP Big Idea 1&2 Data and Creative Development

Abstraction

General idea of a specific part of an algorithm

• ex: flowchart —> general idea of how a program works

Analog Data

Is a continuous stream of data values

• Waves

  • Radio waves

  • Sounds waves

Digital Data

Binary Code

-0s and 1s

Metadata

Is data that describes data and can help others find data and use it more effectively

• date

• time stamp

• file size

• file type

• author/owner

Cleaning data

• ensures incomplete data does not hide or skew results

• removes bad data

• repairs incomplete data

Integers

Whole numbers (1, 2, 3, 4, 5)

• Math with decimals—> imprecise sometimes

• 5 × 0.3= 1.5, but in integers would just be 1

Switching from a computer with 32 bits to 64 bits would

make it 2^(32) more

Data compression algorithm are used when

it is too large to send in a timely manner

Syntax error

missing punctuation or parenthesis, and typos

• Must be corrected before your program is run

Runtime error

Occur when the program is executing

• ex: var= 0 and 0 divide —> crash when its 0 but works at other times

Logic Error

Produces unexpected results

• use a variety of test cases

• Using “+” instead of “-”

Overflow

Interger is larger than programming can hold