Data Portability

Question 1

Lossless compression is?

Answer 1

Enables the original file to be fully restored to its original state

Question 2

Lossy is?

Answer 2

Original file cannot be reinstated

Question 3

Why is compression needed

Answer 3

Volume - of storage required on storage devices, enables larger amounts of data to fit into the same storage space.

Bandwidth- most local or global networks would not cope with the volumes of data being sent, disrupting communication services

Question 4

JPEG

Answer 4

Joint Photographic Experts Group
Reducing repetition of pixel patterns

Question 5

GIF

Answer 5

Graphics Interchange Format
Loseless

Question 6

PNG

Answer 6

Portable Networks Graphics
Lossless

Question 7

TIFF

Answer 7

Tagged Image File Format - lossy and lossless

Question 8

PICT

Answer 8

Apple developed graphic file superseded by pdf - pure institute of computer technology

Question 9

TxT

Answer 9

Plain text can be stored

Question 10

CSV

Answer 10

Comma separated values - data values

Question 11

RTF

Answer 11

Rich Text Format - translate some of a word processors own markup into standardised rtf markup.

Question 12

PDF

Answer 12

Portable Document Format - holds text,formatting images and portable editable regions which reader can fill in.

Question 13

WAV

Answer 13

Windows waveform - loseless

Question 14

Mp3

Answer 14

MPEG audio layer 3 - discards sounds human ear cannot generally hear

Question 15

WMA

Answer 15

Windows Media Audio - made by Microsoft to complete with mp3

Question 16

MIDI

Answer 16

Musical Instrument Digital Interface - via serial interface connected to an electronic instrument or other sound system.

Question 17

MPEG

Answer 17

Moving/Motion picture experts group - a widely-used video file format - delta compression, involves transmitting only info about pixels that change between selected frames

Question 18

MP4

Answer 18

MPEG 4- Stores and plays digital audio with video

Question 19

AVI

Answer 19

Audio video interleaved - no compression applied - supports multiple audio and multiple video streams playing back from 1 file.

Question 20

Data portability is ?

Answer 20

Portable data is data that can be directly transferred between hardware devices or programs without having to be entered again.
Data needs to be stored using different formats to ensure data is portable.