Referring to the figure given below, what output code will appear on t – McqOptions

MCQOPTIONS

1.	Referring to the figure given below, what output code will appear on the output (A3,A2,A1,A0) when the 5 key is pressed?
A.	1010
B.	101
C.	1101
D.	1011
Answer» B. 101

Discussion

No Comment Found

Related MCQs

The circuit in Figure 9-8 is defective; data is not appearing on the output lines. A check with the scope shows data pulses on the serial data line and multiplex control lines, S0–S2; no parity error is indicated. A further check with a logic probe indicates that and ground appear to be present. What might be wrong with the circuit?
The outputs of the 74138 octal decoder are enabled when the enable inputs are .
The 74139 dual four-line demultiplexer functions as a demultiplexer if data input is on the line.
In order to select data input of a 74151 eight-line multiplexer, the select inputs must be:
When data input I of a 74148 octal-to-binary encoder is active, the data output is: = 1 = 1 = 0
All outputs of the 74138 octal decoder are disabled (HIGH) when the enable inputs are:
When data input I of a 74148 octal-to-binary encoder is active, the data output is: = 1 = 0 = 0
Output 3 of a 74138 octal decoder is selected when it is enabled by a data input of: = 1 = 1 = 0
In order to select data input I5 of a 74151 eight-line multiplexer, the select inputs must be ________.
When data input I6 of a 74148 octal-to-binary encoder is active, the data output is ________.