Digital Signal Processing Quiz

What is the primary function of Digital Signal Processing?

• To enhance visual graphics

• To modify, extract, and detect signals

• To create analog signals

• To store data in physical form

Which of the following is NOT an advantage of digital signals?

• Noise is easy to control

• Highly linear within limited dynamic range

• Requires less power than analog

• Insensitivity to component tolerances

According to the Nyquist Theorem, what is the minimum sampling frequency?

• f_s = 4f_m

• f_s = f_m/2

• f_s = f_m

• f_s = 2f_m

What type of system is defined as having output dependent on past outputs?

• Non-linear System

• Static System

• Dynamic System

• Linear System

What is the purpose of a unit delay element in a discrete-time system?

• To advance the signal in time

• To store the signal for future use

• To amplify the signal

• To delay the signal by one sample

Which of the following is a characteristic of a causal system?

• Output depends on future inputs

• Output depends only on present and past inputs

• Output is independent of input

• Output is always zero

What does the Z-transform of a discrete-time signal represent?

• A graphical representation

• A frequency-domain representation

• A spatial representation

• A time-domain representation

What is the condition for a system to be considered stable?

• The impulse response is zero for negative values of n.

• The impulse response is absolutely summable.

• The system has no poles.

• The system is recursive.

What does the transfer function H(z) represent?

• The ratio of the Z-transform of the output signal to the input signal.

• The average of the input signal.

• The sum of the impulse responses.

• The difference between input and output signals.

Which of the following describes a causal LTI system?

• The system has multiple poles.

• The system is stable.

• The impulse response is zero for negative n.

• The impulse response is non-zero for negative n.