Using Hexadecimal

Question 1

Where is hex used

Answer 1

• colour references
• assembly language programs
• error messages

Question 2

What does ASCII stand for

Answer 2

American Standard Code for Information Interchange.

Question 3

Describe ASCII7

Answer 3

• ASCII-7 can
• represent 128 characters.
• Out of 7 bits, 3 are zone bits and 4 are numeric bits.

Question 4

Why standards

Answer 4

Convinient
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Effective
Appropriate

Allow communication and sharing of information
• Allow computing systems and software to interoperate

Question 5

Mention standard organization

Answer 5

ISO - International Standards Organization
• IEEE - Institute for Electrical and Electronics
Engineers
• CSA - Canadian Standards Association
• ANSI - American National Standards Institute
• NSAI - National Standards Authority of Ireland

Question 6

Example of standards

Answer 6

Type of Data
Standards
Alphanumeric
ASCIL, Unicode
Image
JPEG, GIF, PCX, TIFF, BMP, etc
Motion picture
MPEG-2, MPEG-4, etc
Sound
WAV, AU, MP3, etc..
Outline graphics/fonts
PostScript, True Type, PDF

Question 7

Mention the 3 standards for rep alpha and numbers

Answer 7

ASCII - American Standard Code for Information
Interchange
- EBCDIC - Extended Binary-Coded Decimal
Interchange Code (not used anymore, used to be used in IBM mainframes)
- Unicode

Question 8

What is a character code

Answer 8

It is the number generated that represents a symbol for a key

Question 9

What is a character set

Answer 9

• A complete collection of characters is a character set.