Data Storage

Question 1

Why is data stored in binary

Answer 1

Inside cpu there are transistors that can only be on or off representing 1 and 0

Question 2

How can you calculate image files size

Answer 2

Height * width*colour depth

Question 3

Sound file size in bits

Answer 3

Sample rate* duration*bit depth

Question 4

Text file size

Answer 4

Number of characters * bits per character

Question 5

How is an image stored in binary

Answer 5

An image is made of pixels ,each with a colour, each colour has a unique binary code

Question 6

What is a pixel

Answer 6

The smallest part of an image that is a square with one colour

Question 7

What is metadata

Answer 7

Extra data stored with an image

Question 8

What is colour depth

Answer 8

Number of bits used to store each individual colour

Question 9

What is ment by resolution

Answer 9

Number of pixels contained in an image

Question 10

How are characters stored in binary

Answer 10

Each character is given a unique binary code

Question 11

What is a character set

Answer 11

The characters and symbols a computer can represent

Question 12

Ascii

Answer 12

8 bit, logically ordered, store 256 characters

Question 13

Unicode

Answer 13

16 bit, logically ordered, 65536, allows all languages and emojis

Question 14

How is sound stored

Answer 14

Sound wave sampled
The height of the wave is measured
At regular intervals
And stored in binary

Question 15

What does sampling mean

Answer 15

When the amplitude of the sound wave is measured at set intervals

Question 16

What is sample rate

Answer 16

Number of samples per second

Question 17

What is duration

Answer 17

How long the sound file is