A developer needs to deliver a large-scale enterprise application that connects developer chooses an EJB 3.1-compliant application server, which three are true about the EJB business component tier? (Choose three.)

Correct Answer: ADF 🗳️
The EJB tier hosts the business logic of a J2EE application and provides system-level services to the business components problems include state maintenance, transaction management, and availability to local and remote clients.

A developer examines a list of potential enterprise applications and selects the most appropriate technologies to use for each application.
For which two applications is EJB an appropriate solution? (Choose two.)

Correct Answer: CE 🗳️

Which two statements are true? (Choose two.)

Correct Answer: AB 🗳️
Enterprise JavaBeans 3.1, Final Release: 3.2.3 Choosing Between a Local or Remote Client View Remote calls are potentially expensive. They involve network latency, overhead of the client and server software stacks, argument copying, etc. Remote calls are typically programmed in a coarse-grained manner with few interactions between the client and bean.
21.3 Container Providers Responsibility
This section defines the containers responsibilities for providing the runtime environment to the enterprise bean instances. The requirements described here are considered to be the minimal requirements; a container may choose to provide additional functionality that is not required by the EJB specification.

Assume you would like to receive notification from the container as a stateless session bean transitions to and from the ready state.
Which of the following life cycle back annotations would you use? (Choose one.)

Correct Answer: B 🗳️
The Lifecycle of a Stateless Session Bean
The EJB container typically creates and maintains a pool of stateless session beans, beginning the stateless session beans lifecycle. The container performs any dependency injection and then invokes the method annotated @PostConstruct, if it exists. The bean is now ready to have its business methods invoked by a client.
At the end of the lifecycle, the EJB container calls the method annotated @PreDestroy, if it exists. The beans instance is then ready for garbage collection.
Lifecycle of a Stateless Session Bean:

Note: An enterprise bean goes through various stages during its lifetime, or lifecycle. Each type of enterprise bean (stateful session, stateless session, singleton session, or message-driven) has a different lifecycle.
Reference: http://docs.oracle.com/javaee/6/tutorial/doc/giplj.html