Module 2

Question 1

What is a bit?

Answer 1

A single 0 or 1 is called a bit

Question 2

What is a byte?

Answer 2

Eight bits, like 11000101, are called a byte

Question 3

How do you convert binary to decimal?

Answer 3

List the powers of two from right to left. Write the digits of the binary number below their corresponding powers. Add them up.

Question 4

What is ASCII?

Answer 4

ASCII (American Standard Code for Information Interchange) is a character encoding format that represents text in computers and other devices

Question 5

What is unicode?

Answer 5

Unicode is a universal character encoding standard where each letter, digit, or symbol is assigned a unique numeric value

Question 6

What is 1 kilobit or 1 Kb?

Answer 6

2^10 or 1024

Question 7

What is 1 megabit or 1 Mb?

Answer 7

2^20 or 1048576

Question 8

What is 1 gigabit or 1 Gb?

Answer 8

2^30 or 1073741824

Question 9

What is hexadecimal?

Answer 9

Base 16, it goes from 0 to F

Question 10

What is Octal?

Answer 10

Base 8, it goes from 0 to 7

Question 11

What is unsigned binary numbers?

Answer 11

Positive numbers (no arithmetic signs)

Question 12

What is Overflow?

Answer 12

Overflow occurs when the result of a binary operation is too large to fit in allowed number of bits

Question 13

What are Logical Gates?

Answer 13

A logic gate (or just gate) is a transistor circuit that implements a logic function

Question 14

What is a NOT gate?

Answer 14

A NOT gate is called an inverter. It does the opposite, e.g if input is 0, NOT outputs 1.

Question 15

What is a AND gate?

Answer 15

An AND gate outputs 1 only if both the gate’s inputs are 1’s. If one or both inputs is 0, the AND gate outputs 0.

Question 16

What is an OR gate?

Answer 16

An OR gate outputs 1 if either, or both, of the gate’s inputs is a 1. If both inputs are 0, the OR gate outputs 0.

Question 17

What is JPEG

Answer 17

JEPG is a compression standard

Question 18

What is Video

Answer 18

A compression standard in the format of MP4

Question 19

What is resolution?

Answer 19

Resolution is the number of pixels per row and the number of rows of pixels

Question 20

What is audio

Answer 20

Audio, or sound, is the vibration of air molecules that human ears can detect.

Question 21

What is an analog signal

Answer 21

Analog means the signal changes continuously over time

Question 22

What is a digital signal

Answer 22

It’s a signal that has been encoded into a digital format, which can be stored and processed by computers and other digital devices. (1s and 0s)

Question 23

What is WAV

Answer 23

WAV is a common uncompressed audio format, primarily for Microsoft Windows PCs

Question 24

What is bit depth

Answer 24

Audio value is stored using a fixed number of bits, known as bit depth, commonly 16 or 24 bits.

Question 25

What is Zettabyte

Answer 25

is one sextillion or 10^21 bytes

Question 26

What is Data visualization

Answer 26

Data visualization is the display of data in a format, such as a table or chart, that seeks to achieve a goal of conveying particular information to a viewer

Question 27

What is Cardinality

Answer 27

Cardinality is the number of unique elements in a dataset

Question 28

What is a spreadsheet

Answer 28

A spreadsheet is useful for representing data tables, calculating data using equations, and creating charts for data.

Question 29

What is compression

Answer 29

Compression reduces the size of a file

Question 30

How to convert from Binary to Hex?

Answer 30

Memorize 100, 1, 10 , 11 then 100 again, it's 4 digits long

Question 31

How to convert from Hex to Decimal?

Answer 31

Each letter or number represents a value in binary. Multiply that number by 16 to the power of it's index and add them all up. FFF = 15*16^ + 15*16^1 + 15*16^0 = 4095

Question 32

How to convert from Decimal to hex

Answer 32

Divide the value by 16 and record the remainder. Divide the resulting quotient by 16 and record the remainder. Do this until the quotient is 0 and then starting from the bottom is your number.

Question 33

How to convert Binary to Octal

Answer 33

Same as Binary to Hex but it goes from 0 to 7 and only 3 digits.

Question 34

What is a synthesizer

Answer 34

A synthesizer is an electronic musical instrument that generates digital audio signals