22. In negative logic, the logic state 1 corresponds to 15 ?10 037
A. negative voltage
B. zero voltage
C. more negative voltage
D. lower voltage level
23. The output of a 2-input OR gate is zero only when its
A. both inputs are 0
B. either input is 1
C. both inputs are 1
D. eigher input is 0
24. An XOR gate produces an output only when its two inputs are
A. high
B. low
C. different
D. same
25. s
A. ON
B. positive
C. high
D. OFF
26. For getting an output from an XNOR gate, its both inputs must be
A. high
B. low
C. at the same logic level
D. at the opposite logic level
27. In a certain 2-input logic gate, when A = 0, B = 0, then C= I. It must be gate.
A. XOR
B. AND
C. NAND
D. NOR
28. . Boolean algebra is essentially based on
A. symbols
B. logic
C. truth
D. numbers
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