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B.  Write ‘T’ for true and ‘F’ for false.

                    1.  LSD stands for Least Significant Digit.                                      ................................
                    2.  The base of the Decimal Number System is 10.                                 ................................

                    3.  In binary subtraction, the smaller binary number is subtracted from
                       the smaller one.                                                              ................................

                    4.  Octal makes long binary numbers shorter and simpler.                         ................................

                    5.  There are 8 symbols in the binary number system.                             ................................
                 C.  Fill in the blanks using the words given below:
                                                         Hints


                                                                0, 2, 8, 10, 16


                    1.  In binary subtraction, 1 – 1 equals to ................................ .

                    2.  The Hexadecimal number system consists of ................................ digits.
                    3.  In binary addition, 1 + 1 is equal to ................................ .

                    4.  The Octal Number System consists of ................................ digits.

                    5.  The computer system understands ................................ numbers.



                  Let's Do            It                                                    Section B (Subjective)



                 A.  Short answer type questions.
                    1.  What is an Octal number system?

                    2.  How many bits are there in 1 nibble?
                    3.  What is a base in a number system?

                 B.  Long answer type questions.

                    1.  What is a number system? Explain in detail.
                    2.  What are the rules to convert a decimal number into a binary number?
                    3.  Write the rules to subtract two binary numbers.

                 C.  Solve the following:

                    1.  Convert (10111)  into its decimal equivalent.
                                        2
                    2.  Subtract (1101)  from (100110) .
                                        2               2
                    3.  Add the following binary numbers:
                       a. (1000)  and (101)       b. (1011)  and (101)       c. (1001)  and (101)

                                2           2                2           2                2          2
                       d. (1111)  and (1111)       e.  (11001)  and (10101)
                                 2           2                 2             2




                                                                                               Number System       27
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