What is the difference between continuous-time and discrete-time signals?

Continuous-time signals are defined for all time, while discrete-time signals are defined only at specific time intervals.

True or False: A signal is periodic if it repeats after a fixed time period.

True. A periodic signal repeats after a specific time period T.

Fill in the blank: The average power of a signal is defined as _____ over an infinite time.

The limit of the integral of its square.

What type of system is stable if every bounded input produces a bounded output?

A bounded-input bounded-output (BIBO) stable system.

What happens when a continuous-time signal is convolved with an impulse response?

The output is the system's response to the input signal.

Multiple Choice: What is the Fourier transform of a rectangular pulse?

A) sinc function
B) delta function
C) exponential function
D) sinusoidal function

What is the Laplace transform of the unit step function?

1/s for s > 0.

In a discrete-time LTI system, what denotes stability?

All poles of the transfer function must lie inside the unit circle.

Scenario: If a signal is sampled below the Nyquist rate, what occurs?

Aliasing happens, causing distortion in the reconstructed signal.

What is the difference between energy and power signals?

Energy signals have finite energy; power signals have finite power over time.

Fill in the blank: The Z-transform of a sequence x[n] is defined as _____

Sum of x[n] multiplied by z^(-n).

True or False: All periodic signals are power signals.

True. Periodic signals have infinite energy but finite power.

What is the transfer function for an LTI system?

The ratio of the output's Laplace transform to the input's Laplace transform.

Multiple Choice: What is the minimum sampling frequency to avoid aliasing?

A) Bandwidth
B) 2 * Bandwidth
C) Bandwidth/2
D) Bandwidth + 1

What are poles in control systems?

Locations in the s-plane where the transfer function goes to infinity.

What is the Fourier series used for?

To represent periodic signals as a sum of sinusoidal functions.