Chapter 7

Question 1

How many symbols can be represented by four bits?

Answer 1

16

Question 2

P and A representation is what kind of system?

Answer 2

binary

Question 3

What was used to help structure the digitized Oxford English Dictionary?

Answer 3

Tags

Question 4

This defines how characters relate to each other when they are compared

Answer 4

collating sequence

Question 5

When using physical phenomena to encode information, name one potential solution if there are more than two alternatives.

Answer 5

adopt one as a present and all the other alternatives as absent

Question 6

Information describing information is called

Answer 6

metadata

Question 7

K bits in a sequence yield how many symbols?

Answer 7

2^k

Question 8

PandA is short for

Answer 8

present and absent

Question 9

____ encode information on DVDs and CDs

Answer 9

bumps or pits

Question 10

Hexadecimal is base

Answer 10

16

Question 11

Grouping binary digits in groups of four makes converting to ____ easier.

Answer 11

Hex

Question 12

______ is the name we use for the two fundamental patterns of digital information based on the presence and absence of a phenomenon.

Answer 12

PandA

Question 13

Information is said to be_____, or distinct; there is no gray.

Answer 13

discrete

Question 14

The number of digits is the ____ or the ____ of the numbering system.

Answer 14

base, radix

Question 15

The more symbols you want, the more_____ you need.

Answer 15

encoding

Question 16

_____ is representing information with symbols.

Answer 16

Digitizing

Question 17

Make a list of the numbers you use that are not treated as numbers (e.g., phone numbers).

Answer 17

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.

Question 18

Encode (800) 555-0012 in ASCII, including punctuation.

Answer 18

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

Question 19

This chapter mentions that it does not matter whether 0 represents present or absent. Explain in detail why this is the case.

Question 20

Translate the following hexadecimal into binary and then into ASCII: 68 65 78 61 64 65 63 69 6D 61 6C

Answer 20

01101000  01100101  01111000  01100001 01100100 01100101 01100011 01101001 01101101  01100001  01101100;  hexadecimal

Question 21

Encode the following ISBN number in ASCII: 978-3-16-148410-0

Answer 21

57 55 56 45 51 45 49 54 45 49 52 56 52 49 48 45 48

Question 22

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

Answer 22

Way to go!

Question 23

Explain why radio broadcasters use longer encoding to transmit information.

Answer 23

Improves the chances letters will be recognized when spoken under less-than-ideal conditions.

Question 24

Explain why the NATO broadcast alphabet represents digitization. Then explain why it was designed not to be minimal.

Answer 24

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.

Question 25

Explain how Buchholz created an error-detecting name for the memory unit.

Answer 25

“It seemed that after ‘bit’ comes ‘bite.’ But we changed the ‘i’ to a ‘y’ so that a typist couldn’t accidentally change ‘byte’ into ‘bit’ by the single error of dropping the ‘e’.”

Question 26

Without metadata, why would it be hard to search for “set” in a digitized dictionary?