Preview

13 - 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

  128

  8 million

  12

  sets

 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

  258

  512

  122

  128

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

  122

  105

  None of the above

  124

 5. ASCII reserves the first 32 codes (numbers 0–31 decimal) for _______________________:

  binary bits

  control characters

  modal numbers

  punctuation marks

 6. Unicode is an example of:

  a popular 2 byte (16 bit) encoding standard

  A newer version of ASCII but with one more bit (8 bits instead of 7)

  a 1 byte encdoding standard

  An older version of ASCII, no longer in use

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

  include punctuation marks and control codes

  include languages like Arabic and German

  include ancient languages such as Egyptian Hieroglyphics

  None of the above

 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)

  False

  True

 9. Read the excerpt below about EBDIC and decide which statement is true. 
Extended Binary Coded Decimal Interchange Code (EBCDIC) 
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 was developed before ASCII and uses only 6 bits

  EBDIC is exactly the same as ASCII in every way

  There is no such thing as EBDIC

  EBDIC is an eight-bit character encoding

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

  FALSE

  TRUE


Report an error