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OLD GCSE Computer Science.Year12 > Christmas Exam > Flashcards

Christmas Exam Flashcards

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1
Q

What is sampling rate?

A

The amount of audio samples taken per sec

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2
Q

How can you increase sound quality?

A

Increase amount of samples per second

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3
Q

What is the average sampling rate?

A

44kHz

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4
Q

How do you input and output sound

A

Microphone
Speaker

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5
Q

What happens to sound when it is input into a computer?

A

It becomes a digital signal

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6
Q

What’s bit depth and rate?

A

The number of bits available for each clip and the amount of bits per second being used

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7
Q

What are the 2 types of compression?

A

Lossy & Lossless

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8
Q

What’s lossy compression?

A

Decreasing file size through the removal of data. This data can’t be restored.

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9
Q

What’s lossless compression?

A

Encoding digital files without losing any detail.

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10
Q

What’s the advantage of lossless compression?

A

Files can be uncompressed afterwards unlike Lossy compression.

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11
Q

What happens to a picture when it is compressed using lossy compression?

A

Colour depth decreases

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12
Q

What happens to a sound file when it is compressed using lossy compression?

A

Bit Depth is reduced.

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13
Q

Name some lossy compression methods.

A

JPEG, MP3

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14
Q

Give an example of lossless compression?

A

Zip, rar(Winrar)

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15
Q

What kind of files would you not like to use lossy compression on?

A

Text Files, Emails, Spreadsheets

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16
Q

What is an embedded system?

A

Combination of software & hardware meant to perform specific tasks.

17
Q

Where can you find embedded systems?

A

Inside another complete device

18
Q

How are the instrucions in the embedded systems activated?

A

Automatically when certain requirements are met.(E.g., High Heat(Fan), Weight(Turn on scale))

19
Q

Where are the instructions for an enbedded system storred?

A

In some kind of read-only or flash memory.

20
Q

Examples of embedded systems

A

Heating
Cooling
GPS
Fitness Trecker
TVs

21
Q

Are embedded systems expensive?

A

They are cheap.

22
Q
A

OLD GCSE Computer Science.Year12 (2 decks)

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