Data Representation

Question 1

What is the form of all data stored in a computer?

Answer 1

Binary (1’s and 0’s)
1’s Signify on/true/yes and 0’s signify off/false/no

Question 2

What are binary digits known as?

Answer 2

bits

Question 3

What are 8 (binary digits)/bits known as?

Answer 3

A byte (B)

Question 4

How many (binary digits)/bits are in a byte (B)?

Answer 4

Eight, (8)

Question 5

Why is binary digits relevant other than being the form of all data stored in a computer.

Answer 5

The binary unit system is used to describe bigger numbers
for ex.
Size Units
* 4 bits = 0.5 Bytes (B) also known as a nibble
* 8 bits = 1 Byte (B)
* 1,000 Bytes (B) = 1 Kilobyte (KB)
* 1,000 Kilobytes (KB) = 1 Megabyte (MB)
* 1,000 Megabytes (MB) = 1 Gigabyte (GB)
* 1,000 Gigabytes (GB) = 1 Terabyte (TB)
* 1,000 Terabytes (TB) = 1 Petabyte (PB)

Question 6

What is the unit of 1,000 Terabytes (TB)

Answer 6

1 Petabyte (PB), This unit of data is the commonly used by companies, there are higher units of bits/data such as exabyte but we don’t need to know this.

Question 7

What is Analogue Data?

Answer 7

Any data that is recorded physically via optical or electrical methods.
Examples include:
Voltage - Voltmeter
Temperature - Thermometer
Soundwaves - electrisciliscope or something idk its in physics
Pressure - idk

Question 8

What is Digital Data?

Answer 8

Digital data are (binary digits/bits)

Question 9

How does Digital Data and Analogue Data Intertwine?

Answer 9

Digital data is binary data (binary digits) used to represent Analogue Data through computers, as Computers are only compatible with Digital Data, so it must be converted before use from a computer.

Question 10

What is ADC and how does it work?

Answer 10

ADC means Analogue Data-to-Digital Data Convertor, an ADC picks up on Analogue Data signals and then converts them to Digital Data.

Question 11

What is DAC and how does it work?

Answer 11

DAC means Digital Data-to-Analogue Data Convertor, weirdly enough it works the same as ADC but reverse. DAC’s pick up on Digital Data signals and convert into Analogue Data

Question 12

How do you figure out how many files with the same average of space/(digital data, bytes) would be able to be stored in an empty USB hard-drive or a drive?

Answer 12

Drive-space/Average File Digital Data/space/bytes

• ex. We have 350 files that have the average of 30MB and 1 TB of a USB hard-drive to find out how many of these files the drive can take we do the equation above.
• 1000000 (MB) /30 (MB) = 33,333 files
• 33, 333 files

Question 13

How do you figure out if files with a certain average of space can fit onto a USB stick

Answer 13

• Step 1: find out the total number of space/bytes
  file number * average space
• Step 2: bring the storage drives space/bytes to the same byte measuring unit or the total number of space/bytes to the same measuring unit of bytes it depends which your comfortable with.
  Then take the answer from step1 and minus it from the answer of this the storage byte.
• ex. We have 350 files that have the average of 30MB and 1 TB of a USB hard-drive, can these files fit in the 1 TB drive? and if so how much space will be left afterwards?

Total space of the files Drive Capacity
* 35030 = 10,500 * 1 TB = 1000GB =
* 35 * 3 = 105 * 1,000,000 MB
* 10510^(2)

1,000,000 (MB) is > 10,500 (MB) so yes the USB would have enough data to hold those files.
Drive space (converted) - Total space of files
* 1,000,000 - 10,500 = 989,500 (MB)
* 989.5 (GB)
*0.9895 (TB)