A decimal-to-BCD encoder has ________ data inputs. two four five ten

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Question
A decimal-to-BCD encoder has ________ data inputs.
Options
A. two
B. four
C. five
D. ten

Correct Answer

ten

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3. An eight-line multiplexer must have as inputs ________.
Options
A. four data inputs and three select inputs
B. eight data inputs and two select inputs
C. eight data inputs and three select inputs
D. eight data inputs and four select inputs

4. The 74139 dual four-line demultiplexer functions as a decoder if ________.
Options
A. the line is grounded
B. data input is on the line
C. data input is on the A₀ line
D. the A₀ line is grounded

5. The diagram given below shows a ________, and in order for the decimal number 3 to be displayed, terminals ________ must be ________.
Options
A. common-cathode seven-segment display, ef, LOW
B. common-anode seven-segment display, abcdg, HIGH
C. common-anode seven-segment display, abcdg, LOW
D. common-cathode seven-segment display, abcdg, HIGH

6. A(n) ________ is a logic circuit that accepts a set of inputs that represents a binary number, and activates only the output that corresponds to that input number.
Options
A. decoder
B. LED
C. encoder
D. demultiplexer

8. The device shown in below is a ________ and for the waveforms shown in the accompanying diagram, the ________ output at point X will be ________ and all others will be ________.
Options
A. multiplexer, D4, HIGH, LOW
B. demultiplexer, D3, LOW, HIGH
C. demultiplexer, D3, HIGH, LOW
D. decoder, D12, LOW, LOW

9. If by chance more than one of the inputs in an HDL encoder is activated at the same time, the priority encoder ________.
Options
A. enters a fault mode
B. ignores the least significant input
C. resamples the data
D. finds some other input

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