fmixss
  • 1. In a time domain plot, the horizontal axis is a measure of
A) Time
B) Peak amplitude
C) Frequency
D) Wave length
  • 2. The number of bits required to store, or transmit, 1 s of that signal.
A) Baud rate
B) Bps
C) Bit rate
D) Digital signal
  • 3. It combines multiple simple signals into a single, more complex signal.
A) No answer
B) Composite signal
C) Harmonic
D) Waveforms
  • 4. What is the bit rate of a signal in which 10 bit last 2 picoseconds?
A) 5 gigabits
B) 5 petabits
C) 5 terabits
  • 5. Has the function of amplifying and switching electrical signals.
A) Composite signals
B) Transistor
C) Diode
  • 6. Which of the following can be determined from a frequency-domain graph of a signal?
A) Phase
B) Power
C) Time
D) Bandwidth
  • 7. What is the bandwidth of a signal that ranges from 40kHz to 4MHz?
A) 396kHz
B) 3.96MHz
C) 360MHz
  • 8. is a type of transmission impairment in which the signal loses strength due to the resistance of the transmission medium.
A) Capture effect
B) Crosstalk
C) Attenuation
  • 9. A is a two-terminal electronic component that conducts electric current.
A) Diode
B) Composite signal
C) Ics
  • 10. This part involves the conversion of an electronic signal into a physical form that can be perceived by the device.
A) Input transducer
B) Output transducer
C) Encoder
  • 11. A measurement of where a wave is in its cycle, relative to a reference point.
A) Wavelength
B) No answer
C) Phase
  • 12. A sine wave is
A) Periodic and discrete
B) Kapagod yan
C) Periodic and continuous
  • 13. This is the midway component in the system that helps to pass the signal from the transmitter end to the receiver end.
A) User
B) Sender
C) Channel
  • 14. The branch of science and engineering that deals with the study and application of devices and systems that control the flow of electrons, primarily for information processing and control.
A) Electronics
B) Biometrics
C) Physics
  • 15. A/An_is a type of electronic test instrument that graphically displays varying voltages of one or more signals as a function of time.
A) Amplifier
B) Oscilloscope
C) Transponder
  • 16. A compact assembly of electronic circuits formed from various electronic components such as transistors, resistors, and capacitors and their interconnections.
A) Amplifier
B) ICs
C) Transducer
  • 17. The process of encoding a signal using its amplitude, frequency, or phase is known as.
A) Analog modulation
B) Digital modulation
C) Bahala ka
  • 18. The_____ has units of bits/second
A) Yes
B) Throughout
C) No
  • 19. As frequency increases, the period_____
A) Decreases
B) Increases
C) Both?
  • 20. What is the bit rate of a signal in which 1 bit last 2 milliseconds?
A) 5000bits
B) 500bits
C) 50bits
  • 21. Data is transferred in bits.
A) PSK
B) ASK
C) Choose wisely
  • 22. It uses analog signals for data transmission.
A) Analog modulation
B) Digital modulation
C) Bahala ka
  • 23. The___ has units of seconds.
A) Period
B) Frequent
C) Throughout
  • 24. A type of harmonic wave that moves in a periodic manner.
A) Sine wave
B) Digital signal
C) Frequency
  • 25. Is a type of transmission impairment in which an outside source such as crosstalk that corrupts a signal.
A) Reflection
B) Noise
C) Distortion
  • 26. is a type of a transmission impairment in which the signal loses strength due to the different propagation speeds of each frequency that makes up the signal.
A) Crosstalk
B) Distortion
C) Decibel
  • 27. In a frequency-domain plot, the vertical axis measures the
A) Phase
B) Peak amplitude
C) Wavelength
  • 28. A device that converts a physical phenomenon (like sound, light, temperature, etc.) into an electrical signal.
A) Channel
B) Amplifier
C) Transducer
  • 29. What is the duration of 1 bit for a signal with a bit rate of 5 Mbps?
A) 0.000002 milliseconds
B) 0.002 seconds
C) 0.000002 seconds
  • 30. What is the duration of 1 bit for a signal with a bit rate of 100 bps?
A) 0.001 seconds
B) 0.01 milliseconds
C) 0.01 seconds
  • 31. Which of the following configurations provides phase inversion?
A) inverting amplifier
B) voltage follower
C) differential amplifier
D) non-inverting amplifier
  • 32. The sampling theorem is also known as
A) Nyquist theorem
B) Kirchhoff's theorem
C) Ohm's law
D) Fourier theorem
  • 33. The disadvantage of flash ADCs is
A) slow operation
B) high quantization error
C) low accuracy
D) large number of comparators required
  • 34. The process of converting an analog signal into a digital signal is called
A) analog-to-digital Conversion
B) digital-to-analog Conversion
C) demodulation
D) modulation
  • 35. Quantization in ADC means
A) converting each sample into discrete amplitude levels
B) sampling the signal in time
C) filtering the analog signal
D) encoding binary data
  • 36. Which op-amp circuit provides difference between two input voltages?
A) comparator
B) differential amplifier
C) integrator
D) summing amplifier
  • 37. The main advantage of a flash ADC is
A) low cost
B) very high speed
C) low power consumption
D) simplicity
  • 38. The purpose of a sample-and-hold circuit in ADC is to
A) remove high-frequency noise
B) generate clock pulses
C) hold the input signal constant during conversion
D) remove high-frequency noise
  • 39. A successive approximation ADC works by
A) counting clock pulses during conversion
B) sampling only at zero crossings
C) integrating input voltage over time
D) comparing input voltage with reference voltages step-by-step
  • 40. The step size in an ADC determines
A) quantization error
B) sampling frequency
C) output current
D) resolution speed
  • 41. Sampling involves
A) converting binary to decimal
B) taking discrete time samples of a continuous signal
C) filtering unwanted frequencies
D) dividing the signal into equal voltage levels
  • 42. The ideal operational amplifier has which of the following characteristics?
A) both input and output impedances are infinite
B) infinite input impedance and zero output impedance
C) both input and output impedances are zero
D) zero input impedance and infinite output impedance
  • 43. Which terminal of the op-amp is marked with a minus (-) sign?
A) ground terminal
B) inverting input
C) output terminal
D) non-inverting input
  • 44. The ADC output is in
A) analog voltage
B) sinusoidal waveform
C) current form
D) binary form
  • 45. The symbol "+" on an op-amp indicates:
A) the feedback terminal
B) the positive supply voltage
C) the positive output voltage
D) the non-inverting input terminal
  • 46. Common-mode rejection ratio (CMRR) of an op-amp should ideally be
A) Zero
B) very small
C) one
D) very high
  • 47. The purpose of negative feedback in an op-amp is to
A) increase gain
B) increase input impedance
C) reduce bandwidth
D) reduce distortion and stabilize gain
  • 48. Quantization error is the
A) difference between actual and quantized value
B) ratio of signal to noise
C) sum of all sampled values
D) sampling frequency error
  • 49. According to the Nyquist theorem, the sampling rate must be at least
A) equal to the signal frequency
B) twice the highest signal frequency
C) four times the signal frequency
D) half the signal frequency
  • 50. The first step in analog-to-digital conversion.
A) encoding
B) filtering
C) sampling
D) quantization
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