Digital Concepts problems
- 1. What is a digital-to-analog converter?
Options- A. It takes the digital information from an audio CD and converts it to a usable form.
- B. It allows the use of cheaper analog techniques, which are always simpler.
- C. It stores digital data on a hard drive.
- D. It converts direct current to alternating current. Discuss
Correct Answer: It takes the digital information from an audio CD and converts it to a usable form.
Explanation:
A DAC converts an abstract finite-precision number (usually a fixed-point binary number) into a concrete physical quantity (e.g., a voltage or a pressure).
- 2. Any number with an exponent of one is equal to:
Options- A. zero.
- B. one.
- C. two.
- D. that number. Discuss
Correct Answer: that number.
- 3. The frequency of a pulse train is 2 kHz. The pulse period is ________.
Options- A. 5 ms
- B. 50 ms
- C. 500 µs
- D. 2 µs Discuss
Correct Answer: 500 µs
- 4. The rise time is the time it takes a pulse to go from ________.
Options- A. the base line to the maximum HIGH voltage
- B. 10% of the pulse amplitude to the maximum HIGH voltage
- C. the base line to 90% of the pulse amplitude
- D. 10% of the pulse amplitude to 90% of the pulse amplitude Discuss
Correct Answer: 10% of the pulse amplitude to 90% of the pulse amplitude
- 5. What is the decimal value of 2?1 ?
Options- A. 0.5
- B. 0.25
- C. 0.05
- D. 0.1 Discuss
Correct Answer: 0.5
- 6. The range of voltages between VL(max) and VH(min) are ________.
Options- A. unknown
- B. unnecessary
- C. unacceptable
- D. between 2 V and 5 V Discuss
Correct Answer: unacceptable
- 7. What is the decimal value of 23 ?
Options- A. 2
- B. 4
- C. 6
- D. 8 Discuss
Correct Answer: 8
Explanation:
2
3 = 2*2*2=8
- 8. Which of the following statements does NOT describe an advantage of digital technology?
Options- A. The values may vary over a continuous range.
- B. The circuits are less affected by noise.
- C. The operation can be programmed.
- D. Information storage is easy. Discuss
Correct Answer: The values may vary over a continuous range.
- 9. A decoder converts ________.
Options- A. noncoded information into coded form
- B. coded information into noncoded form
- C. HIGHs to LOWs
- D. LOWs to HIGHs Discuss
Correct Answer: coded information into noncoded form
- 10. A classification of ICs with complexities of 100 to 10,000 equivalent gates per chip is known as ________.
Options- A. SSI
- B. MSI
- C. LSI
- D. VLSI Discuss
Correct Answer: LSI
More in Digital Electronics:
Programming
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