Chapter 7 Flashcards
How many symbols can be represented by four bits?
16
P and A representation is what kind of system?
binary
What was used to help structure the digitized Oxford English Dictionary?
Tags
This defines how characters relate to each other when they are compared
collating sequence
When using physical phenomena to encode information, name one potential solution if there are more than two alternatives.
adopt one as a present and all the other alternatives as absent
Information describing information is called
metadata
K bits in a sequence yield how many symbols?
2^k
PandA is short for
present and absent
____ encode information on DVDs and CDs
bumps or pits
Hexadecimal is base
16
Grouping binary digits in groups of four makes converting to ____ easier.
Hex
______ is the name we use for the two fundamental patterns of digital information based on the presence and absence of a phenomenon.
PandA
Information is said to be_____, or distinct; there is no gray.
discrete
The number of digits is the ____ or the ____ of the numbering system.
base, radix
The more symbols you want, the more_____ you need.
encoding
_____ is representing information with symbols.
Digitizing
Make a list of the numbers you use that are not treated as numbers (e.g., phone numbers).
You’re looking for numbers that would be stored and used as strings, I’m assuming. These would include any ID/serial/address/account numbers like an IP address, a phone number, a social security number, a driver’s license or credit card number, etc. Basically anything upon which it wouldn’t make sense to perform a mathematical operation.
Encode (800) 555-0012 in ASCII, including punctuation.
To ASCII:- 40 56 48 48 41 32 53 53 53 45 48 48 49 50
Without considering space in between:- 40 56 48 48 41 53 53 53 45 48 48 49 50
This chapter mentions that it does not matter whether 0 represents present or absent. Explain in detail why this is the case.
Translate the following hexadecimal into binary and then into ASCII: 68 65 78 61 64 65 63 69 6D 61 6C
01101000 01100101 01111000 01100001 01100100 01100101 01100011 01101001 01101101 01100001 01101100; hexadecimal
Encode the following ISBN number in ASCII: 978-3-16-148410-0
57 55 56 45 51 45 49 54 45 49 52 56 52 49 48 45 48
You have discovered the following string of binary ASCII code; figure out what they mean: 01010111 01100001 01111001 00100000 01110100 01101111 00100000 01100111 01101111 00100001
Way to go!
Explain why radio broadcasters use longer encoding to transmit information.
Improves the chances letters will be recognized when spoken under less-than-ideal conditions.
Explain why the NATO broadcast alphabet represents digitization. Then explain why it was designed not to be minimal.
The longer encoding improves the chance that letters will be recognized.But, Digits keep their usual names, except nine, which is known as niner.unrecognized.
NATO broadcast alphabet designed not to be minimal.If,it is designed to be minimal then it may recognized easily.
