U1 Quiz 1

What is the difference between digital and analog signals?

• Digital signals are discrete and represented by binary numbers (0s and 1s), while analog signals are continuous and represented by waveforms.

• Analog signals are more secure than digital signals due to their continuous nature.

• Digital signals are transmitted wirelessly, while analog signals are transmitted through cables.

• Digital signals are continuous and represented by waveforms, while analog signals are discrete and represented by binary numbers (0s and 1s).

Explain the concept of periodic and aperiodic signals.

• Periodic signals repeat at regular intervals, aperiodic signals do not.

• Periodic signals have no defined pattern.

• Periodic signals are random in nature.

• Aperiodic signals repeat at regular intervals.

Define energy and power signals in the context of signal classification.

• Energy signals have finite energy, while power signals have infinite power.

• Energy signals have finite power, while power signals have finite energy.

• Energy signals have finite energy, while power signals have finite power.

• Energy signals have infinite energy, while power signals have infinite power.

What are deterministic signals?

• Deterministic signals are signals that can be precisely defined by a mathematical function or algorithm.

• Deterministic signals are signals that have no pattern or structure.

• Deterministic signals are signals that randomly fluctuate over time.

• Deterministic signals are signals that cannot be described mathematically.

Discuss the properties of random signals.

• Unpredictable, statistical characteristics, non-deterministic, randomness over time

• Predictable, deterministic, constant over time

• Regular, periodic characteristics, deterministic

• Consistent, predictable, deterministic

Explain the classification of signals based on continuity.

• Periodic signals and aperiodic signals

• Deterministic signals and random signals

• Continuous-time signals and discrete-time signals

• Analog signals and digital signals

What is the significance of even and odd signals?

• Even signals have only imaginary frequencies in their Fourier transform.

• Odd signals have all positive or all negative frequencies in their Fourier transform.

• Even signals have all positive or all negative frequencies in their Fourier transform, while odd signals have only imaginary frequencies.

• Even signals have both positive and negative frequencies in their Fourier transform.

Describe the classification of signals based on symmetry.

• Continuous, Discrete, Periodic

• Even, Odd, Neither

• Positive, Negative, Neutral

• Real, Imaginary, Complex

Discuss the concept of periodicity in signals.

• Periodicity in signals refers to the amplitude of the signal

• Periodicity in signals is the same as frequency in signals

• Periodicity in signals is the property where a signal repeats itself at regular intervals.

• Periodicity in signals only occurs in digital signals

Explain the difference between discrete-time and continuous-time signals.

• Discrete-time signals are defined for all points in time within a given interval.

• Continuous-time signals are sequences defined at discrete points in time.

• Discrete-time signals are sequences defined at discrete points in time, while continuous-time signals are functions defined for all points in time within a given interval.

• Discrete-time signals are continuous functions.