Q.1

How many inputs are required for a 1-of-10 BCD decoder?

  • 4
  • 8
  • 10
  • 1
Q.2

From the following list of input conditions, determine the state of the five output leads on a 74148 octal-to-binary encoder.

I0 = 1 I3 = 1 I6 = 1
I1 = 1 I4 = 0 I7 = 1
I2 = 1 I5 = 1 EI = 0
  • GS = L, A0 = L, A1 = L, A2 = H, EO = H
  • GS = L, A0 = H, A1 = L, A2 = L, EO = H
  • GS = L, A0 = L, A1 = H, A2 = L, EO = H
  • GS = L, A0 = H, A1 = H, A2 = L, EO = H
Q.3

The basic comparator evaluates two binary strings bit by bit and always outputs a 1.

  • True
  • False
Q.4

Before you can make a design you must decide if you want an active-HIGH output.

  • True
  • False
Q.5

In a priority encoder, the input with the highest priority is represented on the output.

  • True
  • False
Q.6

Exclusive-AND gates are needed for conversions between Gray code and binary code.

  • True
  • False
Q.7

The microcontroller needs to use only three input lines to monitor eight separate points.

  • True
  • False
Q.8

A BCD is used for communication between a computer and a human being because it is too easy to deal with arithmetically.

  • True
  • False
Q.9

The 74154 is a 1-of-16 decoder. It accepts a 4-bit binary input.

  • True
  • False
Q.10

A demultiplexer takes a dual input data value and routes it to one of several outputs.

  • True
  • False
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