228091
Description
Data Portability
- What is data Portability?
- The ability to transfer data from one system or software
application to anoter without having to re-enter the data.
- The ability to transfer data from one system or software
application to anoter without having to re-enter the data.
- Data Compresion
- Data Compression is used to
reduce the size of a digital file.
- It allows faster file uploads, downloads and
takes less time to attach files to emails.
- Takes up less storage space
on a computer system.
- Data Compression is used to
reduce the size of a digital file.
- Software Compression
and Decompression
- Data files can be compressed by saving
them using a particular file format.
- Graphics can be compressed
using JPEG or GIF format.
- Music files can be
compressed to MP3 format.
- Video files can be
compressed using MPEG.
- Graphics can be compressed
using JPEG or GIF format.
- WinZip is an example of
compression software.
- Files must be decompressed/unzipped/extracted
before they can be opened after compression.
- Files must be decompressed/unzipped/extracted
before they can be opened after compression.
- Data files can be compressed by saving
them using a particular file format.
- The Purpose of a Check Digit
- What is a Check Digit?
- A digit added to the end of a code. The code is used in a
calculation and th check digit is recalculated. If the results
of the calculation do not match the check digit, and error
message appears. The code will have to be input again.
- A digit added to the end of a code. The code is used in a
calculation and th check digit is recalculated. If the results
of the calculation do not match the check digit, and error
message appears. The code will have to be input again.
- Where are they found?
- On the ISBN on the back of a book.
- At the end of a Univeral Product Code (UPC) or barcode on items in a supermarket.
- On the ISBN on the back of a book.
- What is a Check Digit?
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