Digital Electronics MCQ with Answers PDF - 3
Question: 11
The reason, the data outputs of most ROM ICs are tri-state outputs is to
(A) Allow for three separate data input lives
(B) Permit the connection of many ROM chips to a common data bus
(C) Allow the bidirectional flow of data between the lines and the ROM registers
(D) None of the above
Ans: B
Permit the connection of many ROM chips to a common data bus
Question: 12
The Boolean expression for a 3-input AND gate is
(A) X=AB
(B) X=ABC
(C) X=A+B+C
(D) X=AB+C
Ans: B
X=ABC
Question: 13
In the decimal numbering system, what is the MSD?
(A) The last digit on the right
(B) The digit to the right of the decimal point
(C) The middle digit of a stream of numbers
(D) The digit with the most weight
Ans: D
The digit with the most weight
Question: 14
Output will be a LOW for any case when one or more inputs are zero for a(n):
(A) OR gate
(B) NOR gate
(C) NOT gate
(D) AND gate
Ans: D
AND gate
Question: 15
A flip-flop has
(A) One stable state
(B) Two stable states
(C) No stable states
(D) All of the above
Ans: B
Two stable states
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