Big Idea 2

Question 1

Binary

Answer 1

made up of 1s and 0s

Question 2

Binary Digits also known as

Answer 2

bits

Question 3

1 byte =

Answer 3

8 bits

Question 4

Abstraction

Answer 4

remove details to make something more general. this makes it easier to use the process for multiple purposes rather than one specific purpose.

Question 5

Converting Decimal Numbers to Binary

Answer 5

Decimal - base 10: 1, 10, 100, etc
Binary - base 2: 1, 2, 4, 8, 16, 32, etc

1. Write down decimal number
2. Subtract the largest binary number from that number that will not make the number negative
3. Put a 1 in the column of the binary number subtracted and 0s in the ones not used
4. Repeat

Question 6

How can binary numbers be represented

Answer 6

Letters
Colors (RGB)
Machine Instructions

Question 7

Overflow Error

Answer 7

when the integer needed to be represented needs more bits than the programming language can represent

Question 8

Round-Off Error

Answer 8

Occurs when there are very obscure decimal points.

(0.999999998 could just be 1)

Question 9

Analog Data

Answer 9

a continuous stream of data values

Question 10

Data Compression

Answer 10

reducing amount of space of a file

Lossless - allow original image to be restored. no data is lost, but the file size cannot be compressed as much (spot patterns in the code and replace them with shorter code)
Lossy - lose some data in the compression process. original cannot be restored, but compression is greater

Question 11

Raw Data

Answer 11

data collected from all sorts of events. computers were made to help manage this.

Question 12

How Computers Help Process Data

Answer 12

• Cleaning: removing corrupt data, flagging invalid data, helps clear out abbreviations made (Rd or Road)
• Filtering: different subsets can be identified to help ppl make meaning out of data
• Classifying: grouping data in large datasets by commonalities
• Bias: when data doesn’t represent all possibilities in the pool of available options
• Patterns

Question 13

Correlation

Answer 13

correlation doesn’t mean one causes the other. just something that share similar characteristics

Question 14

Scalability

Answer 14

ability to increase the capacity of a resource without having to go to a completely new solution, allowing the resource to continue to operate at acceptable levels when increased capacity is added.

Question 15

Metadata

Answer 15

data that describes data:

• Date
• Time
• Author
• File Size
• File Type

Question 16

How many more bits are available if you go from a 32 bit computer to a 64 bit one

Answer 16

2^32

Question 17

When is sampling needed

Answer 17

When converting analog data to digital data

Question 18

How many unique combination in a byte

Answer 18

256 (2^8)