Page 86 - Computer Science Class 11 Without Functions
P. 86

A            1

                                                                       3     Y


                                           B           2


           3.  Rakesh knows that the NAND gate is a universal gate; therefore, any logic circuit can be implemented using the NAND
              gate. His friend, Ashraf asked him to implement the following circuit using NAND gate. He immediately completed the task.
              Compare the two circuits given below and check whether Rakesh has correctly implemented the circuit given by Ashraf.
              Circuit by Ashraf

                                     A

                                     B





                                     C

                                     D

              Circuit by Rakesh, using only NAND gate only

                                     A

                                     B





                                     C

                                     D

         Ans:  Yes, Rakesh has correctly implemented the circuit using only NAND gates.



                                                  Assessment


        A.  Multiple Choice Questions
           1.  Which of the following is correct?
              a.  The output of AND gate is True when only one input is True.
              b.  The output of OR gate is True when both the inputs are True.
              c.  The output of OR gate is True when only one input is False.
              d.  The output of AND gate is True when either of the inputs are True.
           2.  According to Boolean algebra, the result of A+1 is always:
              a.  1                    b. 0                   c. A                   d. A'
           3.  Suppose, A is fed as input to a NOT gate, If A equals 1, the output will be:
              a.  1                    b. 0                   c. A                   d. A '
           4.  Which of the following are fundamental gates in Boolean logic?
              a.  AND, NAND            b. OR, NOR             c. NAND, NOR           d. XOR, XNOR

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