Signal Classification Quiz

Which of the following is true for an energy signal?

• Infinite energy, finite power

• Finite energy, zero average power

• Finite power, infinite energy

• Infinite energy and infinite power

A power signal typically has:

• Zero average power

• Infinite energy over time

• Both finite energy and finite power

• Energy equal to zero

The signal x(t)=sin⁡(2πt) is classified as:

• Energy signal

• Random signal

• Power signal

• Nonharmonic signal

Which of the following is an example of a deterministic signal?

• Random noise

• Human voice

• Square wave

• White Gaussian noise

A probabilistic signal is:

• Always periodic

• Completely predictable

• Best described using statistics

• Always a power signal

Which of the following signals is not periodic?

• sin⁡(3πt)+sin⁡(6πt)

• sin⁡(2πt)+sin⁡(3π2t)

• cos⁡(4πt)

• sin⁡(2πt)+sin⁡(4πt)

Which condition must be satisfied for a signal to be a power signal?

• Total energy is finite

• Power is infinite

• Average power is finite and non-zero

• Total energy equals zero

The signal x(t)=e−tu(t)x(t) = e^{-t} u(t)x(t)=e−tu(t) is:

• Energy signal

• Power signal

• Harmonic signal

• Random signal

Harmonic signals must be:

• Probabilistic

• Deterministic and periodic

• Non-periodic

• Always random

White Gaussian noise is best classified as:

• Deterministic power signal

• Harmonic energy signal

• Probabilistic power signal

• Deterministic energy signal