Page 67 - Computer Science Class 11 With Functions
P. 67

1
                     Digit 7 represents 7 tens (7 × 10 )
                                                  2
                     Digit 3 represents 3 hundreds (3 × 10 )
                                                   3
                     Digit 2 represents 2 thousands (2 × 10 )

                                                     Assessment


            A.  Multiple Choice Questions
               1.  In the decimal number 129.93, what is the positional value of the digit 3?
                      -2
                                                                      0
                                                -1
                  a.  10                   b. 10                  c. 10                 d. 10 2
               2.  To which system of number representation does the number 17 belong?
                  a.  Decimal              b. Octal               c. Hexadecimal        d. All of these
               3.  Which of the following is Least Significant digit for the decimal number 95128?
                  a.  8                    b. 1                   c. 9                  d. 5
               4.  Consider the statements given below:
                  Statement A: The decimal number system is not a digital system.
                  Statement B: All the digital equipment works on just two values – 0s and 1s.
                  a.  Both statements are correct
                  b.  Both statements are incorrect
                  c.  Only statement A is correct.
                  d.  Only statement B is correct.
               5.  Which of the following is the correct binary equivalent of decimal digit 8?
                  a.  100                  b. 1000                c. 101                d. 1001
               6.  Which of the following is the correct RGB code for green colour?
                  a.  (FF,00,00)           b. (00,FF,00)          c. (00,00,FF)         d. (00,00,00)
               7.  Which of the following is the correct binary equivalent of (101) ?
                                                                    10
                  a.  1100101              b. 1010011             c. 1100100            d. 1100010
               8.  Which of the following is the correct binary equivalent of (F0) ?
                                                                   16
                  a.  00001111             b. 11001100            c. 11100011           d. 11110000
               9.  ASCII is an encoding scheme for characters of ____.
                  a.  Hindi                b. English             c. Japanese           d. Both a and b

              10.  Which of the following is True about ISCII?
                  a.  It is a 7-bit code.
                  b.  It was developed for all Asian languages.
                  c.  Most of the codes used in ASCII are retained in ISCII.
                  d.  The Bureau of Indian Standards has not yet adopted it.

            B.  State whether the following statements are True or False:
               1.  Octal numbers have a base value of 8.                                                  __________
               2.  Only the decimal number system can be used to represent the decimal  numbers.          __________
               3.  The right-most digit is the least significant digit of the given number.               __________
               4.   All character codes of ASCII are retained in ISCII.                                   __________
               5.  UNICODE is a universal coding scheme.                                                  __________
            C.  Fill in the blanks.
               1.  The leftmost bit of a decimal number is known as __________.
               2.  The decimal equivalent of (A)  is __________.
                                         16


                                                                            Number Systems and Encoding Schemes  65
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