Quiz Study Questions for the topic: Data

• Explain clearly the difference between a 'Kilo' and 1,000, and, between a 'Mega' and 1,000,000.
• Arrange these terms for capacity in computer systems and decimal values in ascending order: peta, mega, giga, kilo, tera, exa, 100, 1,000, 1,000,000, 1,000,000,000
• A file with an even megabyte in a directory has roughly how many megabits when it is put over a DMA channel or network?
• What are the max directly addressable RAM sizes for 16, 32 & 64-bit CPUs?
• Discuss these data representations, tell where they used, their limitations, and how many characters are defined in each: ASCII, EBCDIC, UniCode.
• UTF-8 is the most widely used character set for Linux-based web servers. What problem does it solve?
• Describe the applications where these character definitions prevail: ASCII, UTF-8, UniCode, ISO-8859, and HTML Special Characters?
• Name three common 'control characters' in ASCII or EBCDIC & and tell what they control or signify.
• What is a 'collating sequence'? What does it affect? Name a couple two systems where collating sequence differs.
• Converting values among number systems:

2610 = ______2        2610 = ______16

AA16 = ________2     AA16 = ______10

10102 = _______16        10102 = _______10
• Given this outline, describe how the data is represented and give an appropriate use for each entry:
• Numeric
• Integer
• Float
• Decimal
• Character
• Char
• String
• Text
• Date/Time
• Boolean
• BLOB
• How is an 'epoch' used in modern date and date/time data types?
• What caused the very real Y2K crisis?
• What would be the appropriate data type for any/all of these?
• A person's birthdate
• An address field on a form
• The rate of accelleration of an object
• A counter in a loop
• The location of a pixel in a 3D animation
• The amount of tax on an invoice
• The result of a logical comparison, true/false
• The pressure of a gas in a container
• The count of beans in a pod
• The cost per unit of some small item
• A long chapter in a novel

G Saunders,
Dept of Information Systems