Q1. What do you mean by a signal?
Ans.: If a function represents a physical quantity or a variable containing information about the behaviour and nature of a phenomenon, it is known as a signal.
Q2. What do you mean by a system?
Ans.: A device or a set of rules defining the functional relation between the input and output is known as a system.
Q3. classify continuous time systems.
Ans.: Continuous time signals are classified as follows: