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# Digital Electronics - Code Converters and Multiplexers

### Exercise

"Example is better than precept."
- (Proverb)
1.

How many outputs are on a BCD decoder?

 A. 4 B. 16 C. 8 D. 10

2.

In a Gray code, each number is 3 greater than the binary representation of that number.

 A. True B. False

3.

Use the weighting factors to convert the following BCD numbers to binary.

0101 0011        0010 0110 1000

 A. 01010011    001001101000 B. 11010100    100001100000 C. 110101        100001100 D. 101011        001100001

4.

Which digital system translates coded characters into a more useful form?

 A. encoder B. display C. counter D. decoder

5.

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

 A. GS = L, A0 = L, A1 = L, A2 = H, EO = H B. GS = L, A0 = H, A1 = L, A2 = L, EO = H C. GS = L, A0 = L, A1 = H, A2 = L, EO = H D. GS = L, A0 = H, A1 = H, A2 = L, EO = H