Unit 1

Question 1

Binary

Answer 1

A way of representing information using only two options. This is how computers represent information.

Question 2

Bit

Answer 2

A contraction of “Binary Digit”; the single unit of information in a computer, typically represented as a 0 or 1

Question 3

Byte

Answer 3

8 bits

Question 4

Overflow Error

Answer 4

Error from attempting to represent a number that is too large.

Question 5

Round-Off Error

Answer 5

Error from attempting to represent a number that is too precise. The value is rounded.

Question 6

Analog Data

Answer 6

Data with values that change continuously, or smoothly, over time. Some examples of analog data include music, colors of a painting, or position of a sprinter during a race.

Question 7

Digital Data

Answer 7

Data that changes discretely through a finite set of possible values

Question 8

Sampling

Answer 8

A process for creating a digital representation of analog data by measuring the analog data at regular intervals called samples.

Question 9

Loseless Compression

Answer 9

A process for reducing the number of bits needed to represent something without losing any information. This process is reversible.

Question 10

Lossy Compression

Answer 10

A process for reducing the number of bits needed to represent something in which some information is lost or thrown away. This process is not reversible.

Question 11

Intellectual Property

Answer 11

A work or invention that is the result of creativity, such as a piece of writing or a design, to which one has rights and for which one may apply for a patent, copyright, trademark, etc.

Question 12

Creative Commons

Answer 12

A collection of public copyright licenses that enable the free distribution of an otherwise copyrighted work, used when an author wants to give people the right to share, use, and build upon a work that they have created

Question 13

Convert this binary number to decimal: 01111111

Answer 13

127

Question 14

Convert this decimal number to binary: 67

Answer 14

01000011

Question 15

There are 20 people in our classroom. What is the minimum number of bits that would be needed to count all of these people?

Answer 15

5

11111 = 1 + 2 + 4 + 8 + 16 = 31
BUT
1111 = 1 + 2 + 4 + 8 = 15

Question 16

Abstraction

Answer 16

Simplifying complexity so the concept is more general.

Numbers are abstract since the same amount can be represented by different number representations.

Question 17

To create a higher quality digital representation of an analog black and white image, do you increase or decrease the size of the sampling square?

Answer 17

Decrease. The smaller the square, the more pixels and bits you can use to produce the digital representation.

Question 18

What’s the difference between low and high frequency?

Answer 18

High Sampling = more bits, more pixels, smoother image
Lower Sampling = less bits, less pixels, jagged image

Question 19

What color is represented by this 9-bit-color: 000111000

Answer 19

Green.
First 3 bits is Red, Middle 3 is Green, Last 3 is Blue

Question 20

What color is represented by this 9-bit-color: 000111000

Answer 20

Green.
First 3 bits is Red, Middle 3 is Green, Last 3 is Blue