Page 82 - Computer Science Class 11 Without Functions
P. 82

a.  The bulb will be ON if and only if both switches are in the ON position.
              b.  The bulb will be ON if A is ON, but B is OFF.
              c.  The bulb will be ON if B is ON, but A is OFF.
              d.  The bulb will be ON if and only if both switches are in the OFF position.
           6.  Consider the circuit diagram given below:






                                      Voltage  ∼
                                                                          A OR B
                                                                A

                                                                B

              Which of the following statements is True?
              a.  The bulb will be ON if either switch is in the ON position.
              b.  The bulb will be ON only if A is ON.
              c.  The bulb will be ON only if B is ON.
              d.  The bulb will be ON if and only if both switches are in the ON position.
           7.  Which of the following operators is a unary operator that inverts the variable's value? Identify this operator out of the
              options given below:
              a.  AND                   b. OR                 c. NOT                 d. XOR

           8.  Which of the following is the correct description of AND gate?
              a.   A            A  B
                 B

              b.   A          A + B
                 B

              c.  A            A

              d.


           9.  Which of the following is not a valid Boolean algebra postulate?
              a.  a + b = b + a
              b.  a + (b ● c) = (a + b) ● (a + c)
              c.  a + 0 = 0
              d.  a + a' = 1

          10.  Assuming that a and b are boolean variables, which of the following is the correct equation for De Morgan's Law?
              a.  (a + b)' = a' ● b'    b. (a + b) = a' + b'   c. (a + b)' = (a' + b')'   d. (a' + b)' = (a' + b')'

          11.  Consider the following logic diagram:
                                           A


                                            B

              Which of the following gates is the correct representation of the above diagram?
              a.  XOR                   b. XNOR               c. NOR                 d. NAND






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