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Computing Science Computer Systems > Data Representation > Flashcards

Data Representation Flashcards

1
Q

How much Bits is ASCII

A

8 bits

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2
Q

How much Bits is Unicode

A

16 bits

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3
Q

How much Characters does ASCII have

A

128

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4
Q

How much characters does Unicode have

A

65,536

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5
Q

Advantage of Unicode

A

Has more characters so there are emojis and different characters from different languages.

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6
Q

Disadvantage of Unicode

A

Each character uses more memory/storage when stored.

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7
Q

Advantage of ASCII

A

Uses less memory/storage than Unicode.

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8
Q

Disadvantage of ASCII

A

Limited amount of characters which makes it limited to other languages

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9
Q

What are the two types of Graphics

A

Vector
Bit-Mapped

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10
Q

What are the Vector attributes

A

Fill Colour, Line Colour, Coordinates

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11
Q

What are the Vector Objects

A

Rectangle, Ellipse, Polygon, Line

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12
Q

What are Bit-mapped Graphics made of

A

Pixels

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13
Q

What is Resolution

A

The number of pixels used to represent the image which are stored in a 2D array.

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13
Q

What is Bit Depth

A

The number of bits allocated to represent each pixel.

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14
Q

What happens when you increase the Resolution or Bit Depth

A

More Storage is Used/File size increases

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15
Q

What is dpi

A

Dots Per Inch

16
Q

Advantages of Vectors

A

Objects can be layered

Increasing the scale of an object doesn’t affect file size

File Size is smaller than Bit-Mapped

17
Q

Disadvantages of Vectors

A

Limitation of creativity with the image
Less Detailed

18
Q

Advantages of Bit-Map Graphics

A

Higher Quality Images
More Detail
Looks Better

19
Q

Disadvantages of Bit-Map Graphics

A

Takes up more Storage than Vectors
Increasing Resolution increases Storage required

20
Q

What happens when you increase the number of Bits assigned to the Mantissa

A

Increases the precision of the number

21
Q

What happens when you increase the number of Bits assigned to the Exponent

A

Increases the range of numbers.

Computing Science Computer Systems (4 decks)

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