26. A NAND gate has :
(a) LOW inputs and a HIGH output
(b) LOW inputs and a LOW output
(c) HIGH inputs and a HIGH output
(d) None of the these
27. The basic logic gate whose output is the complement of the input is the :
(a) OR gate
(b) AND gate
(c) INVERTER gate
(d) None of these
28. What input values will cause an AND logic gate to produce a HIGH output ?
(a) All inputs are LOW.
(b) At least one input is LOW.
(c) All inputs are HIGH.
(d) At least one input is HIGH.
29. How many NAND circuits are contained in a 7400 NAND IC ?
(a) 1
(b) 2
(c) 3
(d) 4
30. Exclusive-OR (XOR) logic gates can be constructed from what other logic gates ?
(a) OR gates only
(b) OR gates and NOT gates
(c) AND gates and NOT gates
(d) AND gates, OR gates, and NOT gates
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