Signals and Systems Mastery

What is the fundamental period of sin(100πt)?

1. 0.02 s
2. 0.01 s
3. 100 s
4. 0.05 s

The integral of the unit impulse δ(t) over all time is:

1. 0
2. Infinite
3. Undefined
4. 1

A linear time-invariant (LTI) system is completely described by its:

1. Power rating
2. Input signal
3. Impulse response
4. DC gain only

The output of an LTI system is the input:

1. Multiplied by the impulse response in time
2. Added to the impulse response
3. Convolved with the impulse response
4. Divided by the impulse response

A causal system is one whose output depends only on:

1. Present and past inputs
2. Random noise
3. Its power supply
4. Future inputs

An LTI system is BIBO stable if its impulse response is:

1. Periodic
2. Absolutely integrable (or absolutely summable)
3. Infinite in length
4. Always positive

A Fourier series represents a periodic signal as:

1. A single impulse
2. A polynomial
3. A sum of harmonically related sinusoids
4. A random sequence