Section Seven - Data Representation Flashcards

1
Q

Fill in the gaps:

1) apply (2) operators to (3

A

(1) Logic Gates
(2) Boolean Operators
(3) inputs

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2
Q

Complete the sentence:

NOT gates takes a single Input…

A

…and gives a single output

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3
Q

What is a feature of a NOT gate?

A

The output is always the opposite value to the Input

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4
Q

Finish the sentence:

AND gates take two inputs…

A

…and give one output

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5
Q

Finish the sentence:

OR gates take two inputs…

A

…and give one output

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6
Q

What is the size of a bit (b)?

A

A single binary digit (1 or 0)

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7
Q

What is a parity bit used for?

A

To check for errors in binary numbers?

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8
Q

What is a Binary Shift?

A

Used to Multiply or Divide numbers, every bit is moved along to the left or the right

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9
Q

When do Overflow Errors occur?

A

When a number has too many bits?

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10
Q

What are Images stored as?

A

A series of pixels

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11
Q

What increases the file size of a image?

A

Increasing the Colour Depth and Resolution

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12
Q

What do devices need to display images?

A

Metadata

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13
Q

What does Metadata include?

A

File format, height, width, colour depth and resolution

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14
Q

What factors affect the size and quality of sound files?

A

Sampling intervals
Sampling frequency
Sample size
Bit rate

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15
Q

What are the two types of compression?

A

Lossless and Lossy

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16
Q

How does Lossy compression work?

A

Works by permanently removing data from the file

17
Q

How does Lossless compression work?

A

Works by making the file smaller by temporarily removing data to store the file and restores it to original state when it’s opened