chapter 11-file management

Question 1

whatre 3 the generic text type file formats

Answer 1

.csv (comma seperated value)
.txt (text)
.rtf (rich text format)

Question 2

whatre 4 image file formats

Answer 2

.gif (graphics interchange format)
.jpg (joint photographic expert group)
.pdf (portable document format)
.png (portable network graphics)

Question 3

what are the differences between .gif and .jpg

Answer 3

they both are widely used in webpages but gif stores still or moving images while jpg only stores still images

Question 4

whatre the features of .pdf images

Answer 4

• documents that have been converted to an image format,they allow docs to be seen as images so they can be read on computers.
  -page looks like a printed doc but can contain hyperlinks buttons and audio
  -can be protected from editing

Question 5

whatre the features of png images

Answer 5

-created to replace gif
-most used image compression format on internet

Question 6

what is mp4

Answer 6

-moving pictures experts group layer 4
-used for video files
-cintainer used for storing video files images and audio
-used to to transfer video files on internet

Question 7

what is mp3

Answer 7

moving pictures experts group layer 3
-compressed file format for audio
-high quality with small file size

Question 8

what is .css

Answer 8

-cascading style sheet
-attached to webpage to define the formatting of it

Question 9

what is .html

Answer 9

hypertext markup language
text based lang used to create makrup thet is displayed on web browsers

Question 10

what is .rar

Answer 10

-roshal archive
-container that stores several files with diff file types in a compressed format
-used to reduce number of bytes needed to save files to save storage or save time
-designed for microsoft operating system

Question 11

what is .zip

Answer 11

zip file
-container that holds several files in a compressed files
-used to save storage and time

Question 12

why are backups used

Answer 12

to quickly recover files when data is accidentally overwritten,deleted or corrupted

Question 13

why are archives used

Answer 13

to store versions of files t hat are used rarely or stored in diff locations

Question 14

why do we compress files

Answer 14

since comp systems have limited storage and its important to minimise delays when data is sent between 2 devices

Question 15

how can still image files be reduced in size

Answer 15

resizing (reduce pixels,crop image)
resampling (reducing width and height)

Question 16

how can you compress files

Answer 16

convert to portable doc format (pdf) and compress them together in zip or rar file

Question 17

explain difference between RTF and TXT files (3)

Answer 17

RTF has basic formatting (embolden, underline, etc.) while TXT is plain text
RTF is capable of paragraph formatting while TXT is not
RTF is capable of creating bulleted lists while TXT is not
RTF files can include images while TXT cannot
TXT takes up less memory while RTF takes up more memory