Continuous-Time Signals Quiz

Which of the following is an example of a continuous-time signal?

• Temperature variation over time

• Number of cars passing per hour

• Daily rainfall record

• Digital clock time

A discrete-time signal is defined only at:

• All points of time

• Specific and separated time intervals

• Continuous spatial coordinates

• Zero only

Which one is an elementary continuous-time signal?

• Unit step function

• Sequence of bits

• Bar chart

• Excel data

Which signal is defined as u(t)?

• Unit impulse

• Unit ramp

• Unit step

• Sinusoidal signal

Which of the following is an example of a continuous-time signal?

• Pulse code modulation

• Heartbeat measured every second

• Sound wave

• Number of people entering a store each hour

A discrete-time signal is defined only at:

• All real values of time

• Random points

• Integer multiples of a sampling interval

• Zero only

Which of the following is NOT a basic signal?

• Unit step

• Unit impulse

• Square root

• Ramp

What is the value of the unit step function u(t) when t<0?

• 1

• 0

• t

• Undefined

Which signal exists for all real values of time?

• Digital signal

• Continuous-time signal

• Sampled signal

• Clock signal

Which of the following statements is TRUE about the unit step signal u(t)?

• u(t)=1for all t

• u(t)=0 for t<0and u(t)=1 for t≥0

• u(t)=∞ at t=0

• u(t)is undefined for t<0