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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