fmixss
  • 1. In a time domain plot, the horizontal axis is a measure of
A) Frequency
B) Wave length
C) Time
D) Peak amplitude
  • 2. The number of bits required to store, or transmit, 1 s of that signal.
A) Baud rate
B) Bps
C) Digital signal
D) Bit rate
  • 3. It combines multiple simple signals into a single, more complex signal.
A) Harmonic
B) Waveforms
C) Composite signal
D) No answer
  • 4. What is the bit rate of a signal in which 10 bit last 2 picoseconds?
A) 5 petabits
B) 5 terabits
C) 5 gigabits
  • 5. Has the function of amplifying and switching electrical signals.
A) Transistor
B) Composite signals
C) Diode
  • 6. Which of the following can be determined from a frequency-domain graph of a signal?
A) Bandwidth
B) Phase
C) Power
D) Time
  • 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) Attenuation
C) Crosstalk
  • 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) Encoder
C) Output transducer
  • 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) Kapagod yan
B) Periodic and continuous
C) Periodic and discrete
  • 13. This is the midway component in the system that helps to pass the signal from the transmitter end to the receiver end.
A) Sender
B) Channel
C) User
  • 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) Biometrics
B) Electronics
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) Oscilloscope
B) Amplifier
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) Transducer
C) ICs
  • 17. The process of encoding a signal using its amplitude, frequency, or phase is known as.
A) Bahala ka
B) Analog modulation
C) Digital modulation
  • 18. The_____ has units of bits/second
A) Throughout
B) No
C) Yes
  • 19. As frequency increases, the period_____
A) Increases
B) Both?
C) Decreases
  • 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) Choose wisely
C) ASK
  • 22. It uses analog signals for data transmission.
A) Digital modulation
B) Bahala ka
C) Analog modulation
  • 23. The___ has units of seconds.
A) Throughout
B) Frequent
C) Period
  • 24. A type of harmonic wave that moves in a periodic manner.
A) Frequency
B) Digital signal
C) Sine wave
  • 25. Is a type of transmission impairment in which an outside source such as crosstalk that corrupts a signal.
A) Distortion
B) Reflection
C) Noise
  • 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) Decibel
B) Distortion
C) Crosstalk
  • 27. In a frequency-domain plot, the vertical axis measures the
A) Wavelength
B) Phase
C) Peak amplitude
  • 28. A device that converts a physical phenomenon (like sound, light, temperature, etc.) into an electrical signal.
A) Transducer
B) Amplifier
C) Channel
  • 29. What is the duration of 1 bit for a signal with a bit rate of 5 Mbps?
A) 0.002 seconds
B) 0.000002 milliseconds
C) 0.000002 seconds
  • 30. What is the duration of 1 bit for a signal with a bit rate of 100 bps?
A) 0.01 milliseconds
B) 0.001 seconds
C) 0.01 seconds
  • 31. Which of the following configurations provides phase inversion?
A) non-inverting amplifier
B) differential amplifier
C) voltage follower
D) inverting amplifier
  • 32. The sampling theorem is also known as
A) Fourier theorem
B) Nyquist theorem
C) Kirchhoff's theorem
D) Ohm's law
  • 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) digital-to-analog Conversion
B) modulation
C) demodulation
D) analog-to-digital Conversion
  • 35. Quantization in ADC means
A) filtering the analog signal
B) encoding binary data
C) sampling the signal in time
D) converting each sample into discrete amplitude levels
  • 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) simplicity
B) low power consumption
C) low cost
D) very high speed
  • 38. The purpose of a sample-and-hold circuit in ADC is to
A) remove high-frequency noise
B) remove high-frequency noise
C) generate clock pulses
D) hold the input signal constant during conversion
  • 39. A successive approximation ADC works by
A) counting clock pulses during conversion
B) comparing input voltage with reference voltages step-by-step
C) integrating input voltage over time
D) sampling only at zero crossings
  • 40. The step size in an ADC determines
A) sampling frequency
B) resolution speed
C) output current
D) quantization error
  • 41. Sampling involves
A) taking discrete time samples of a continuous signal
B) converting binary to decimal
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) zero input impedance and infinite output impedance
C) infinite input impedance and zero output impedance
D) both input and output impedances are zero
  • 43. Which terminal of the op-amp is marked with a minus (-) sign?
A) ground terminal
B) inverting input
C) non-inverting input
D) output terminal
  • 44. The ADC output is in
A) sinusoidal waveform
B) analog voltage
C) binary form
D) current form
  • 45. The symbol "+" on an op-amp indicates:
A) the non-inverting input terminal
B) the positive supply voltage
C) the feedback terminal
D) the positive output voltage
  • 46. Common-mode rejection ratio (CMRR) of an op-amp should ideally be
A) one
B) very high
C) Zero
D) very small
  • 47. The purpose of negative feedback in an op-amp is to
A) increase gain
B) reduce distortion and stabilize gain
C) increase input impedance
D) reduce bandwidth
  • 48. Quantization error is the
A) sampling frequency error
B) difference between actual and quantized value
C) ratio of signal to noise
D) sum of all sampled values
  • 49. According to the Nyquist theorem, the sampling rate must be at least
A) equal to the signal frequency
B) four times the signal frequency
C) twice the highest signal frequency
D) half the signal frequency
  • 50. The first step in analog-to-digital conversion.
A) filtering
B) quantization
C) encoding
D) sampling
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