Interfacing to the Analog world MCQs Quiz with Answers

1. Which signal is sampled at regular intervals for the purpose of ADC?.

A. analog signal.

B. digital signal.

C. quantized signal.

D. sampled signal.

2. Which factor depends on the quantisation error?.

A. number of error.

B. number of bits.

C. size of error.

D. conversion process.

3. Which is the first type of error caused during the conversion process?.

A. sampling error.

B. interrupt signal.

C. counter error.

D. quantisation error.

4. Which of the following defines the number of samples that are taken in the time period?.

A. sample size.

B. sample nature.

C. sample rate.

D. sample frency.

5. Which of the following can determine the speed of conversion device itself?.

A. sample rate.

B. sampled data.

C. sample size.

D. sample nature.

6. Which of the following can determine the maximum frency that can be converted?.

A. sample frency.

B. sample rate.

C. sample size.

D. sample nature.

7. Which term determines the random timing error?.

A. jitter.

B. quantisation error.

C. sample error.

D. delay.

8. Which of the following introduce a phase error?.

A. conversion time.

B. sampling rate.

C. sample size.

D. sample nature.

9. Which of the following can generate an interrupt?.

A. timer.

B. trigger.

C. delay.

D. counter.

10. Which filter is used for filtering out the high frency components?.

A. bandpass filter.

B. band reject filter.

C. analogue filter.

D. digital filter.

11. Which theorem describes the sampling rate with the frency of the analogue signal?.

A. Nyquist theorem.

B. Bayes theorem.

C. Sampling theorem.

D. Parseval's theorem.

12. From which of the following words does codecs is derived?.

A. coder.

B. decoder.

C. coder-decoder.

D. coder-encoder.

13. Which codec is used in digital audio?.

A. A-law.

B. ??-law.

C. linear.

D. PCM.

14. Which of the following have the same quantisation step throughout the range?.

A. linear.

B. PCM.

C. DPCM.

15. Which is used in the telecommunication applications which has a limited bandwidth of 300 to 3100 HZ?.

A. linear codec.

B. logarithmic codec.

C. PCM.

D. DPCM.

16. Which codec is used in the UK?.

A. a-law.

B. ??-law.

C. linear codec.

D. PCM.

17. What does PCM stand for?.

A. pulse codec machine.

B. pulse code modulation.

C. peripheral code machine.

D. peculiar code modulation.

18. Which of the following conversion is performed by using a lookup table?.

A. DPCM.

D. Linear cdec and a-law.

19. What does DPCM stand for?.

A. differential pulse code modulation.

B. data pulse code modulation.

C. dynamic pulse code machine.

D. dynamic pulse code modulation.

20. Which of the following have a 16-bit digital dynamic range?.

A. PCM.

B. DPCM.

C. linear codec.

D. logarithmic codec.

21. How many types of logarithmic codecs are used commonly?.

A. 2.

B. 3.

C. 4.

D. 5.

22. What does ADPCM stand for?.

A. address differential pulse code modulation.

B. adaptive differential pulse code modulation.

C. address dynamic pulse code machine.

D. adaptive dynamic pulse code modulation.

23. Which of the following uses a non-linear quantisation value?.

A. PCM.

B. DPCM.

D. linear codec.

24. Which of the following works by increasing the dynamic range?.

A. logarithmic codec.

B. linear codec.

C. DPCM.

D. PCM.

25. Which device can make the PWM operation easier?.

A. timer.

B. software.

C. hardware.

D. transistor.

26.  Which of the following can be used for providing high gain?.

A. transistor.

B. darlington transistor pair.

C. resistor.

D. capacitor.

27. Which devices have high drive capability?.

A. transistor.

B. fet.

C. buffer pack.

D. darlington amplifier.

28. Which of the following is used to switch heavy loads?.

A. fet.

B. transistor.

C. buffer pack.

D. darlington pair.

29. Which allows the switching of DC motor by using two outputs and four FETs?.

A. transistor.

B. H bridge.

C. darlington pair.

D. buffer pack.

30. Which of the following is used to create H bridge?.

A. switches.

B. led.

C. capacitor.

D. inductor.

31. Which of the following allows voltage reversing?.

A. H bridge.

B. Relays.

C. LEDs.

D. LCDs.

32. Which devices are used as indicators in a digital system?.

A. LCD.

B. LED.

C. Varactor diode.

D. Gunn diode.

33. How is the biasing done in LEDs?.

A. forward bias.

B. no bias.

C. supply voltage.

D. reverse bias.

34. Which of the following determines the brightness of LEDs?.

A. current.

B. voltage.

C. resistance.

D. conductance.

35. Which of the following is a current limiting device?.

A. voltage.

B. current.

C. buffer.

D. inductor.

36. Which of the following can switch the current by a make or break contact?.

A. transistor.

B. relay.

C. buffer.

D. fet.

37. Which of the following generates a back EMF?.

A. relay.

B. buffer.

C. transistor.

D. FET.

38. Which of the following is used to avoid the back EMF in the relay?.

A. resistor.

B. capacitor.

C. inductor.

D. diode.

39. Which of the following can provide a speed control techni in the DC motor interfacing?.

A. PCM.

B. DPCM.

D. PWM.