Identify the equivalent logic gate represented by the given circuit.

Four logic gate symbols are given below. Which of these are the symbols for $OR$,$NOR$,and $NAND$ gates,respectively?

What are analog signals and digital signals?

Identify the logic operation carried out by the given circuit.

What is the output of the logic gate combination shown below?

Digital signals are characterized by which of the following statements?
$(i)$ They do not provide continuous values.
$(ii)$ They represent values in discrete steps.
$(iii)$ They can be represented by a binary system.
$(iv)$ They represent both binary and decimal systems.