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Digital Technology > Digital Data > Flashcards

Digital Data Flashcards

1
Q

Define the term data?

A

Raw facts and figures which have no meaning

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2
Q

Define the term information?

A

Data that has been processed to give meaning

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3
Q

What do computers store data as?

A

Computers store data as a series of 1’s and 0’s

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4
Q

What is a bit?

A

A single 1 or 0

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5
Q

What is a nibble?

A

4 bits

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6
Q

What is a byte?

A

8 bits

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7
Q

How many bytes are in a kilobyte?

A

1000 bytes

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8
Q

How many kilobytes in a megabyte?

A

1000 KB

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9
Q

How many megabytes in a gigabyte?

A

1000 MB

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10
Q

How many gigabytes in a terabyte?

A

1000 GB

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11
Q

How many terabytes in a petabyte?

A

1000 TB

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12
Q

What data type is 12?

A

Integer

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13
Q

What data type is 12/3/2019

A

Date/Time

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14
Q

What data type is a single letter or digit?

A

Character

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15
Q

What data type is AC12G?

A

String

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16
Q

What is a pixel?

A

The smallest unit of a digital image that can be displayed and edited

17
Q

What is the resolution of an image?

A

The number of pixels in the image

18
Q

What is a bitmap image?

A

This is an image that are generated from electronic devices

19
Q

What is an vector image?

A

Computer generated images

20
Q

What are the disadvantages of a bitmap?

A

You can’t resize the image as you will lose quality (pixelation)

21
Q

What are the advantages of vector?

A

Vectors can be resized without losing quality

Vectors take up less storage place than bitmap

22
Q

What is the sample rate?

A

The rate at which samples are taken

23
Q

What is the bit depth?

A

The number of bits used to store each sample

24
Q

What is the bit rate?

A

The number of bits processed in any given time in the playback?

25
Q

What is downloading a video?

A

Saving the video onto the devise to watch on any time

26
Q

What is streaming a video?

A

Watching a video live from a website without downloading to your device

27
Q

What is buffering?

A

Part of the video is stored in the buffer(computer memory) before the user watches it.

Why?
If the internet connection is lost the user can continue to watch the video while the video is being reestablishes

28
Q

Why would a person compress the size of a file?

A

To save storage space devise

To be able to send it as an attachment on an email

29
Q

Describe lossy compression?

A

Reduces the file but it decreases the quality

30
Q

Describe lossless compression?

A

The size has been reduced while no data has been lost

31
Q

Describe data portability?

A

We the moving of data from one computer system to another without having to re-enter the data

Digital Technology (1 decks)

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