Do liquids and gases also exert pressure? Does it depend upon on the area on whch the force acts?

Yes liquids and gases both exerts pressure and pressure exert by these two is called pressure due to fluids.
Which is given by:
$$\begin{gathered} P = h\rho g \\ where h is theheight of fluid \\ \rho is the density of fuid \\ g is the acceleration due to gravity. \\ So pressure does not depend on the area . \end{gathered}$$