Code Converters and Multiplexers problems
- 1. How many exclusive-NOR gates would be required for an 8-bit comparator circuit?
Options- A. 4
- B. 6
- C. 8
- D. 10 Discuss
Correct Answer: 8
- 2. The inputs/outputs of an analog multiplexer/demultiplexer are:
Options- A. bidirectional
- B. unidirectional
- C. even parity
- D. binary-coded decimal Discuss
Correct Answer: bidirectional
- 3. One way to convert BCD to binary using the hardware approach is:
Options- A. with MSI IC circuits
- B. with a keyboard encoder
- C. with an ALU
- D. UART Discuss
Correct Answer: with MSI IC circuits
- 4. If two inputs are active on a priority encoder, which will be coded on the output?
Options- A. the higher value
- B. the lower value
- C. neither of the inputs
- D. both of the inputs Discuss
Correct Answer: the higher value
- 5. A BCD decoder will have how many rows in its truth table?
Options- A. 10
- B. 9
- C. 8
- D. 3 Discuss
Correct Answer: 10
- 6. A principle regarding most IC decoders is that when the correct input is present, the related output will switch:
Options- A. active-HIGH
- B. to a high impedance
- C. to an open
- D. active-LOW Discuss
Correct Answer: active-LOW
- 7. One multiplexer can take the place of:
Options- A. several SSI logic gates
- B. combinational logic circuits
- C. several Ex-NOR gates
- D. several SSI logic gates or combinational logic circuits Discuss
Correct Answer: several SSI logic gates or combinational logic circuits
- 8. For the following conditions on a 7485 magnitude comparator, what will be the state of each of the three outputs?
A0 = 0 B0 = 1 IA < B = 0 A1 = 1 B1 = 0 IA = B = 1 A2 = 1 B2 = 0 IA > B = 0 A3 = 0 B3 = 0
Options- A. A = B = 0, A < B = 0, A > B = 1
- B. A = B = 0, A < B = 1, A > B = 0
- C. A = B = 1, A < B = 0, A > B = 0
- D. A = B = 0, A < B = 0, A > B = 0 Discuss
Correct Answer: A = B = 0, A < B = 0, A > B = 1
- 9. The expansion inputs to a comparator are used for expansion to a(n):
Options- A. 4-bit system
- B. 8-bit system
- C. BCD system
- D. counter system Discuss
Correct Answer: 8-bit system
- 10. Why is the Gray code more practical to use when coding the position of a rotating shaft?
Options- A. All digits change between counts.
- B. Two digits change between counts.
- C. Only one digit changes between counts. Discuss
Correct Answer: Only one digit changes between counts.
More in Digital Electronics:
Programming
Copyright ©CuriousTab. All rights reserved.