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- Question
A "floating" TTL input may be defined as:
Options- A. unused input that is tied to Vcc through a 1 k Ω resistor.
- B. unused input that is tied to used inputs.
- C. unused input that is tied to the ground.
- D. unused input that is not connected.
- Correct Answer
- unused input that is not connected.
- 1. The major advantage of dynamic RAM over static RAM is ________.
Options- A. cost
- B. speed
- C. storage density
- D. cost and storage density Discuss
- 2. A device used to display one or more digital signals so that they can be compared to expected timing diagrams for the signals is a:
Options- A. DMM
- B. spectrum analyzer
- C. logic analyzer
- D. frequency counter Discuss
- 3. What is the most important operation in binary-coded decimal (BCD) arithmetic?
Options- A. addition
- B. subtraction
- C. multiplication
- D. division Discuss
- 4. Determine if diodes D1 and D2 in the given figure are forward or reverse biased.
Options- A. D1 forward and D2 reverse
- B. D2 forward and D1 reverse
- C. D1 and D2 reverse
- D. D1 and D2 forward Discuss
- 5. An OR array is programmed by blowing fuses to eliminate selected variables from the output functions.
Options- A. True
- B. False Discuss
- 6. Inputs that cause the output of a flip-flop to change instantaneously are asynchronous.
Options- A. True
- B. False Discuss
- 7. Convert each of the following signed binary numbers (two's-complement) to a signed decimal number.
00000101 11111100 11111000
Options- A. ?5 +4 +8
- B. +5 ?4 ?8
- C. ?5 +252 +248
- D. +5 ?252 ?248 Discuss
- 8. Which of the following is one of the basic characteristics of DRAMs?
Options- A. DRAMs must have a constantly changing input.
- B. DRAMs must be periodically refreshed in order to be able to retain data.
- C. DRAMs have a broader "dynamic" storage range than other types of memories.
- D. DRAMs are simpler devices than other types of memories. Discuss
- 9. What is the main disadvantage of the counter-ramp A/D converter?
Options- A. It requires a counter.
- B. The counter must count up from zero at the beginning of each conversion sequence, and the conversion time will vary depending on the input voltage.
- C. It requires a precision clock in order for the conversion to be reliable.
- D. The counter must count up from zero at the beginning of each conversion sequence, and the conversion time will vary depending on the input voltage. It requires a precision clock in order for the conversion to be reliable. Discuss
- 10. Most complex digital designs include a mix of different hardware categories.
Options- A. True
- B. False Discuss
More questions
Correct Answer: cost and storage density
Correct Answer: logic analyzer
Correct Answer: addition
Correct Answer: D1 forward and D2 reverse
Correct Answer: True
Correct Answer: True
Correct Answer: +5 ?4 ?8
Correct Answer: DRAMs must be periodically refreshed in order to be able to retain data.
Correct Answer: The counter must count up from zero at the beginning of each conversion sequence, and the conversion time will vary depending on the input voltage.
Correct Answer: True
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