What is Managed Bean?

Ans:JavaBean objects managed by a JSF implementation are called managed beans. A managed bean describes how a bean is created and managed. It has nothing to do with the bean’s functionality.
Managed bean is about how the bean is created and initialized. As you know, jsf uses the lazy initialization model. It means that the bean in the particular scope is created and initialized not at the moment when the scope is started, but on-demand, i.e. when the bean is first time required.

What is Top Link?

Ans:
Top Link is an Object-Relational Mapping layer that provides a map between the Java objects that
the model uses and the database that is the source of their data.
By default, a session is created named default. In the following steps, you create a new session