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7.  7 | 5 will  result in ………………… .
                     a.  5                                          b.  7
                     c.  12                                         d.  20
                  8.  Which of the following is not an encoding scheme?
                     a.  ASCII                                      b.  ISCII
                     c.  BCD                                        d.  ABC
                  9.  Unicode can encode a character set of ………………… .
                     a.  Urdu                                       b.  Kannada
                     c.  Bengali                                    d.  All of these
                 10.  UTF-8, UTF-16 and UTF-32 are encodings of ………………… .
                     a.  ASCII                                      b.  Unicode
                     c.  ISCII                                      d.  BCD
                 11.  ASCII value of space is ………………… .
                     a.  30                                         b.  31
                     c.  32                                         d.  33
                 12.  BCD stands for ………………… .
                     a.  Bit-coded decimal                          b.  Bit composite decimal
                     c.  Binary convert digit                       d.  Binary coded decimal

                 Answers
                 1.  b           2.   c          3.  a          4.  d           5.  c          6.   a
                 7.  b           8.   d          9.  d         10.  b          11.  c         12.  d


              B.  Fill in the blanks:
                  1.  The process of converting into its equivalent numeric code is called ………………… .

                  2.  In signed magnitude notation the sign bit is assigned ………………… for negative numbers.
                  3.  -10 will be represented as  ………………… in 8-bit signed magnitude notation.
                  4.  +12 will be represented as ………………… in 8-bit One’s complement method.
                  5.  Two’s complement representation of  -13 in 8-bit notation is ………………… .
                  6.  ………………… operators are used to move the bits of an integer to left or right.
                  7.  123.4 in normalised notation will be represented as ………………… .
                  8.  Single precession numbers have ………………… bit exponent and ………………… bit mantissa.

                  9.  In BCD each decimal digit is expressed as a group of ………………… bits.
                 10.  Lower case alphabets have ASCII value in the range ………………… .
                 11.  ISCII stands for ………………… .
                 12.  A total of ………………… scripts is supported by latest version of Unicode.
                Answers
                                                                                                                   2
                  1.  encoding    2.  1         3.  10001010   4.  00001100    5.  01110011    6.  Shift   7.  1.234 × 10
                  8.  8, 23       9.  4        10.  97 to 122   11.  Indian Script Code for Information Interchange     12.  159
              C.  Answer the following questions:

                  1.  What is the need for character encoding?
                Ans.  Characters are stored inside the computer as numeric codes. A character encoding provides a key to unlock this  binary code. It
                     is a set of mappings between the bytes in the computer and the characters in the character set.
                  2.  Given an 8-bit number with signed magnitude representation as 10001011 . Find its decimal value.
                                                                               2
                Ans.  Sign bit is 1, so the number is negative.
                                                   0
                                             1
                      Value = 0001011 = 1 × 2  + 1 × 2  + 1 × 2  = -11
                                       3
                6666  Touchpad Computer Science-XI
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