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11 - ASCII, Unicode, EBDIC

 1. The ASCII character set is a 7-bit set of codes that allows ____ different characters. That is enough for every upper-case letter, lower-case letter, digit and punctuation mark on most keyboards. ASCII is only used for the English language

  111

  128

  512

  8

 2. Read the excerpt about ASCII - True or False? 
ASCII was developed from telegraph code. Its first commercial use was as a seven-bit teleprinter code promoted by Bell data services

  FALSE

  TRUE

 3. Originally based on the English alphabet, ASCII encodes _________ specified characters into seven-bit integers

  512

  258

  122

  128

 4. Lowercase i would be represented in the ASCII encoding by binary 1101001 = hexadecimal 69 (i is the ninth letter) = decimal _____

  124

  122

  None of the above

  105

 5. ASCII reserves the first 32 codes (numbers 0–31 decimal) for _______________________: 
These are codes originally intended not to represent printable information, but rather to control devices (such as printers)

  binary bits

  punctuation marks

  control characters

  modal numbers

 6. Unicode uses between 8 and 32 bits per character, so it can represent characters from ______________________________________ 
Note: Unicode can handle any language and it does so by the user selecting what is called a specific 'code page' which is one portion of the total unicode space. Each code page represents the chosen language. The greek language, for example, is represented by code page 1253 in Unicode

  a range of different sounds

  a 1 byte encdoding standard

  languages from all around the world

  mathematical conversions that are used in engineering

 7. Later versions of unicode use even more bits (e.g 21 bits) ..this was done in order to

  None of the above

  include languages like Arabic and German

  include ancient languages such as Egyptian Hieroglyphics

  include punctuation marks and control codes

 8. Read the following excerpt and decide whether it is true or false 
UTF-8 has been the dominant character encoding for the World Wide Web 
since 2009, as it is most popular in every country, and as of July 
2018 accounts for 91.8% of all web pages and 95.5% of the top 1,000 
highest ranked web pages (some of which are simply ASCII, a 
subset of UTF-8)

  True

  False

 9. Read the excerpt below about EBDIC and decide which statement is true. 
Extended Binary Coded Decimal Interchange Code is 
an eight-bit character encoding used mainly on IBM 
mainframe and IBM midrange computer operating systems. 

It descended from the code used with punched cards and
the corresponding six bit binary-coded decimal code used 
with most of IBM's computer peripherals of the late 1950s 
and early 1960s. It is supported by various non-IBM platforms, 
such as Fujitsu-Siemens' BS2000/OSD, OS-IV, MSP,
and MSP-EX, the SDS Sigma series, Unisys VS/9, Burroughs MCP and ICL VME.

  EBDIC is an eight-bit character encoding

  EBDIC is exactly the same as ASCII in every way

  There is no such thing as EBDIC

  EBDIC was developed before ASCII and uses only 6 bits

 10. EBCDIC has a wider range of control characters than ASCII - and was used for IBMs large operating systems

  TRUE

  FALSE


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