Podcast
Questions and Answers
Which of the following best describes the role of a container in the context of EJBs?
Which of the following best describes the role of a container in the context of EJBs?
- It defines the structure and behavior of EJBs through a standard API.
- It translates EJBs code into machine code for different operating systems.
- It provides a set of pre-built EJBs for developers to use in their applications.
- It manages the lifecycle of EJBs, including instantiation and destruction. (correct)
What is the primary function of Enterprise Java Beans (EJBs) within the JEE framework?
What is the primary function of Enterprise Java Beans (EJBs) within the JEE framework?
- To define the network protocols for communication between servers.
- To implement the business logic of enterprise applications. (correct)
- To handle client-side scripting and user interface design.
- To manage database connections and execute SQL queries.
What is the relationship between JEE, Web APIs, and EJB APIs?
What is the relationship between JEE, Web APIs, and EJB APIs?
- EJB APIs are a superset of JEE, which includes Web APIs.
- JEE, Web APIs, and EJB APIs are unrelated technologies.
- Web APIs and EJB APIs are distinct parts that constitute the JEE framework. (correct)
- JEE is a subset of Web APIs, while EJB APIs are independent.
In the context of Enterprise Java Beans (EJBs), what is a 'container' primarily responsible for?
In the context of Enterprise Java Beans (EJBs), what is a 'container' primarily responsible for?
What is the key characteristic of Message-Driven Beans (MDBs)?
What is the key characteristic of Message-Driven Beans (MDBs)?
Which type of server commonly implements or supports both Web APIs and EJB APIs?
Which type of server commonly implements or supports both Web APIs and EJB APIs?
An EJB is best described as which of the following?
An EJB is best described as which of the following?
What distinguishes an Application Server from a Web Server in the context of JEE?
What distinguishes an Application Server from a Web Server in the context of JEE?
Which document defines the standards and specifications for Enterprise Java Beans (EJBs)?
Which document defines the standards and specifications for Enterprise Java Beans (EJBs)?
Which of the following is NOT a type of Session Bean?
Which of the following is NOT a type of Session Bean?
Flashcards
What are EJBs?
What are EJBs?
Enterprise Java Beans (EJBs) are server-side components/standards/specifications/APIs used to implement business logic in enterprise applications.
What are Application Servers?
What are Application Servers?
Containers/servers that implement or support Web APIs (Web and EJBs) are called Application Servers.
What is the EJB Container responsible for?
What is the EJB Container responsible for?
The container manages the lifecycle of an EJB, from instantiation to destruction.
What are Session Beans?
What are Session Beans?
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What are Message-Driven Beans?
What are Message-Driven Beans?
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What are Stateless Session Beans?
What are Stateless Session Beans?
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What are Stateful Session Beans?
What are Stateful Session Beans?
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What are Singleton Session Beans?
What are Singleton Session Beans?
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Study Notes
- Enterprise Java Beans (EJBs) are introduced.
What are EJBs?
- JEE constitutes a collection of APIs employed in business application development, divided into Web APIs and EJB APIs.
- Web Servers are containers/servers that implement or support Web APIs; Tomcat serves as an example.
- JSP and JSF are types of Web APIs.
- Application Servers implement or support both Web and EJB APIs; GlassFish is an example of an Application Server.
- An EJB is a server-side component/standard/specification/API intended to implement business logic in enterprise applications.
- EJBs, as server-side components, are controlled in lifecycle by the server container.
- The container instantiates and destroys EJBs as needed.
- EJBs are defined by a Java Specification Request (JSR) document, specifically JSR-220.
- Session Beans (SB) and Message-Driven Beans are two types of EJB.
Session Beans
- Session Beans implement business logic
- Stateless, Stateful, and Singleton Session Beans exist.
Message Driven Beans
- Message Driven Beans (MDBs), primarily used for asynchronous message sending between servers, are not covered in this module.
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