Exponential signal is an example of _________ signal.

Deterministic signal:

• A signal is said to be deterministic if there is no uncertainty with respect to its value at any instant of time.
• The signals which can be defined exactly by a mathematical formula are known as deterministic signals.
• Example- sin (t), cos (t), e^at 

Non-deterministic signal:

• The behavior of these signals is random i.e. not predictable w.r.t time.
• There is an uncertainty with respect to its value at any time.
• These signals can't be expressed mathematically.
• Example: Thermal Noise generated is a non-deterministic signal.

Periodic signal:

• A periodic signal is a signal that repeats its values at regular intervals.
• A periodic is expressed as x(t) = x(t + t_o)
• Example- sin (t), cos (t)

​Non-Periodic signal:

• A non-periodic signal is any signal that does not repeat itself after any period of time.
• Example- speech signal, e^at