Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Computer Science > Data representation > Flashcards

Data representation Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What base is decimal

A

base 10

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What base is binary

A

base 2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What base is hexidecimal

A

base 16

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why is hexidecimal often used in computing

A

because large numbers can be represented in less characters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

how many bits are in a byte

A

8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How many bytes are in a kilobyte

A

1024

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How many kilobytes in a megabyte

A

1024

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How many megabytes in a gigabtye

A

1024

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How many gigabytes in a megabyte

A

1024

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How is bits represented

A

b

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How is bytes represented

A

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How is kilobytes represented

A

kB

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How is megabytes represented

A

MB

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How is gigabytes represented

A

GB

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What happens when you shift a binary number to the left 1

A

The binary number is timesed by 2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What happens when you shift a binary number to the right 1

A

divided by 2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is binary shifts used for

A

To times or divide by the powers of 2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

How manys bits are in an ASCII character

A

7 bits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

How manys bits are in an Uncicode character

A

16 bit

20
Q

How is Unicode and ASCII ordered

A

They are ordered sytematically alphabeitcally
e.g A=65 B=66

21
Q

How many characters can be represented by ASCII

A

128

22
Q

What is the advantage of ASCII

A
  • It uses a low amount of data because it only requires 7 bits of data to hold a character
23
Q

What is the disadvantage of ASCII

A
  • As it only stores 128 characters it cannot be used by different languages which use special characters
24
Q

How many characters are stores in unicode

A

65,536

25
Q

What types of characters can unicode represent

A

Letters(from all different languages)
Mathmatical symobls
Emojis

26
Q

What is the advantage of Unicode

A

It can represent lots of characters (65408 more than ASCII)

27
Q

What is the disadvantage of unicode

A

It takes up a lot of space as it uses 2 bytes to represent one character

28
Q

How much does unicode and ASCII overlap

A

The first 127 characters of Unicode are the ASCII characters

29
Q

What is amplitude

A
  • the height of a wave
  • how loud a sound is
30
Q

What happens when you increace the amplitude of a sound

A

The volume increaces

31
Q

What is frequency

storing sound

A

-The distance between waves
- The number of waves that occour in time period

32
Q

What happens when you increace the frequency of a sound wave

A

The sounds pitch becomes lower

33
Q

What is a sound produced naturally called

A

analogue

34
Q

What part of a computer converts analogue to digital sound

A

analogue to digital converter
(adc)

35
Q

What is a digital sound

A

A sound that is produced and stored on a computer (non natural)

36
Q

What is sampling

A

measuring the amplitude of a sound wave at specific time intervals

37
Q

What is sample rate

A

the number of samples taken per seconds

38
Q

What is sample rate measured in

A

hertz

39
Q

What is sample resolution

A

the number of bits used to store a sample of amplitude

40
Q

What is the equation for file size of sound

A

file size = sampling rate x resolution x time in seconds

41
Q

What is the equation for file size of images in bytes

A

Size = (width x height x colourdepth in bits)/8

in bytes

42
Q

What is pixel short for

A

Picture element

43
Q

What is a Pixel

A

A single point on an image

44
Q

What is colour depth

A

The number of bits used to represent each pixel

45
Q
A

Computer Science (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions