Combinational Logic Circuits problems
- 1. A magnitude comparator determines:
Options- A. A ≠ B and if A ɑ B or A >> B
- B. A ≈ B and if A > B or A < b
- C. A = B and if A > B or A < b
- D. A ≡ B and if A < b or a > B Discuss
Correct Answer: A = B and if A > B or A < b
- 2. A basic multiplexer principle can be demonstrated through the use of a:
Options- A. single-pole relay
- B. DPDT switch
- C. rotary switch
- D. linear stepper Discuss
Correct Answer: rotary switch
- 3. Select one of the following statements that best describes the parity method of error detection:
Options- A. Parity checking is best suited for detecting single-bit errors in transmitted codes.
- B. Parity checking is best suited for detecting double-bit errors that occur during the transmission of codes from one location to another.
- C. Parity checking is not suitable for detecting single-bit errors in transmitted codes.
- D. Parity checking is capable of detecting and correcting errors in transmitted codes. Discuss
Correct Answer: Parity checking is best suited for detecting single-bit errors in transmitted codes.
- 4. Which digital system translates coded characters into a more intelligible form?
Options- A. encoder
- B. display
- C. counter
- D. decoder Discuss
Correct Answer: decoder
- 5. A multiplexed display:
Options- A. accepts data inputs from one line and passes this data to multiple output lines
- B. uses one display to present two or more pieces of information
- C. accepts data inputs from multiple lines and passes this data to multiple output lines
- D. accepts data inputs from several lines and multiplexes this input data to four BCD lines Discuss
Correct Answer: uses one display to present two or more pieces of information
- 6. One application of a digital multiplexer is to facilitate:
Options- A. code conversion
- B. parity checking
- C. parallel-to-serial data conversion
- D. data generation Discuss
Correct Answer: parallel-to-serial data conversion
- 7. Most demultiplexers facilitate which of the following?
Options- A. decimal to hexadecimal
- B. single input, multiple outputs
- C. ac to dc
- D. odd parity to even parity Discuss
Correct Answer: single input, multiple outputs
- 8. Which type of decoder will select one of sixteen outputs, depending on the 4-bit binary input value?
Options- A. hexadecimal
- B. dual octal outputs
- C. binary-to-hexadecimal
- D. hexadecimal-to-binary Discuss
Correct Answer: hexadecimal
- 9. A circuit that responds to a specific set of signals to produce a related digital signal output is called a(n):
Options- A. BCD matrix
- B. display driver
- C. encoder
- D. decoder Discuss
Correct Answer: encoder
- 10. How many inputs are required for a 1-of-10 BCD decoder?
Options- A. 4
- B. 8
- C. 10
- D. 1 Discuss
Correct Answer: 4
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