File management

Question 1

Explain what the following file extensions are short for and what type of file associated with? rtf

Answer 1

Rich Text Format- text and images

Question 2

Explain why generic file types are used?

Answer 2

It allows you to save files so that they can be opened on any platform

Question 3

Explain what the following file extensions are short for and what type of file associated with? csv

Answer 3

Comma Separated Values- spreadsheets

Question 4

Explain what the following file extensions are short for and what type of file associated with? txt

Answer 4

Standard Text Document- Text

Question 5

Explain what the following file extensions are short for and what type of file associated with? gif

Answer 5

Graphics interchange Format- storing moving images

Question 6

Explain what the following file extensions are short for and what type of file associated with? jpg

Answer 6

Joint photographic Experts group- still and small images

Question 7

Explain what the following file extensions are short for and what type of file associated with? png

Answer 7

Portable Network Graphics- higher quality images

Question 8

Explain what the following file extensions are short for and what type of file associated with? pdf

Answer 8

Portable Document Format- image, hard to edit

Question 9

Explain what the following file extensions are short for and what type of file associated with? mp3

Answer 9

MPEG - 1 Audio Layer – 3 – videos, good quality

Question 10

Explain what the following file extensions are short for and what type of file associated with? mp4

Answer 10

mp4 - MPEG – 4 Format – Has all additional things to a video

Question 11

Explain what the following file extensions are short for and what type of file associated with? css

Answer 11

Cascading Style Sheet- instead of editing whole file

Question 12

Explain what the following file extensions are short for and what type of file associated with? htm

Answer 12

Hypertext Markup Language- websites

Question 13

Explain what the following file extensions are short for and what type of file associated with? zip

Answer 13

File compressed format- makes files smaller

Question 14

Explain what the following file extensions are short for and what type of file associated with? rar

Answer 14

Roshal Archive Format- makes files smaller

Question 15

Why should I use version numbers when saving work, e.g. compressionV1, compression V2, etc?

Answer 15

So if your download does not work you can go back to the correct one or a different number for each other

Question 16

Give 2 reasons why using smaller file sizes is desirable?

Answer 16

Reduces the amount of space needed to store data and download.

Question 17

Units of download sizes in order of smallest to largest.

Answer 17

Bit
Bite
KB
MB
GB
TB
PB (Peta Byte)

Question 18

What are the 2 types of compression called?

Answer 18

Lossy compression and lossless compression

Question 19

What are the key differences between lossy and lossless compression?

Answer 19

With lossy compression you lose some quality on your video and data but on lossless you reduce file size with no loss of quality. The negative of lossy is that you loose the original quality

Question 20

Explain why we use file compression.

Answer 20

We use file compression because:
Less storage space required for files
Faster download and uploads
Smaller file attachments for emailing
Coping with slow links when streaming
Saving a lot of storage- we can save much more storage on our hard drive. Many applications have a size limit to your exports.

Question 21

What is normal test data?

Answer 21

Typical and sensible data that a computer should be able to processed by a computer

Question 22

What is abnormal data?

Answer 22

Abnormal data is test data that falls outside of what is acceptable and should be rejected by the system.

Question 23

What is extreme data?

Answer 23

Extreme test data is the maximum and minimum values of normal data that are accepted by the system.

Question 24

Give 2 error messages which may come up when attempting to save work.

Answer 24

• “Error: Unable to save data. Please check your internet connection and try again.”
• “Error: Insufficient disk space. Unable to save data. Please free up disk space and try again.”