The Value expression usually fetches a value or a set of values. These expressions can be categorized into rvalue and Ivalue expressions. The Ivalue expressions can read as well as write data whereas on the other hand rvalue expression can only read the data.

The method expression allows the users to involve a public method of the bean which returns the result that is important for validation of the data component and for handling the events.

BY Best Interview Question ON 24 Mar 2019