Signals and Systems Unit 1

Which of the following is a deterministic signal?

• A. Random noise
  
  
  

• B. Sine wave

• C. Stock price

• D. Heartbeat variability

A signal that repeats itself over time is called:

• A. Periodic

• B. Even

• C. Periodic

• D. Deterministic

In a continuous time signal, the independent variable:

• A. Takes only integer values

• B. Is not defined

• C. Takes values from a continuous

• D. Is always periodic

The impulse function δ(t) is defined as:

• A. 1 for all t

• B. 0 for all t except t = 0

• C. A continuous signal

• D. A periodic function

The sinc function is mathematically represented as:

• A. sin(x)/x

• B. x/sin(x)

• C. sin(πx)/πx

• D. cos(x)/x

Which of the following signals is odd?

• A. |t|

• B. cos(t)

• C. sin(t)

• D. e^t

A ramp signal is defined as:

• A. A constant signal

• B. A step signal

• C. A linearly increasing function

• D. An exponentially increasing function

Differentiation of a ramp signal results in:

• A. A unit step signal

• B. A sinusoidal signal

• C. An impulse signal

• D. A constant signal

Time folding refers to:

• A. Time delay

• B. Reversing the time axis

• C. Compression of time

• D. Shifting signal to origin

A system with infinite response to a bounded input is:

• A. Stable

• B. Unstable

• C. Time invariant

• D. Linear