How can a EJB pass it's reference to another EJB ? Which of the following is correct syntax for an Abstract class?

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 How can a EJB pass it's reference to another EJB ? Which of the following is correct syntax for an Abstract class?

1.abstract double area() { }

2.abstract double area()

3.abstract double area();

4.abstract double area(); { }

Posted Date:-2022-09-17 11:17:49

More MCQS Questions and answers

  1. An different programming language like C ,C++ etc.
  2. At what point, precisely, in the life-cycle is a container-managed entity bean considered created?
  3. Choose different kinds of enterprise beans in EJB from following
  4. From the following APIs, which API does NOT guarantees to be supported by EJB 2.0 containers?
  5. How can a EJB pass it's reference to another EJB ? Which of the following is correct syntax for an Abstract class?
  6. In ___________, one message is delivered to one receiver only.
  7. Session beans don't have
  8. The EJB specification architecture does NOT define
  9. To expose a service through RMI, you have to create the service interface that extends
  10. What executes EJB components?
  11. Which case of a session bean obtains the UserTransaction object via the EJBContext using the getUserTransaction() method in EJB transaction management?
  12. Which middleware services are provided by EJB?
  13. Which of the following annotation is used to specify or inject a dependency as ejb instance into another ejb?
  14. Which of the following is true?
  15. Which server-side component is required to be deployed on the server?
  16. . What happens when you pass a serialized object as an argument or return value that doesn't exist either in the Client or the Server?
  17. . Which EJB container must provide an implementation of Java Naming and Directory Interface (JNDI) API to provide naming services for EJB clients and components?
  18. A class is serializable if a class's inheritance hierarchy implements _________.
  19. A Stateless session bean is a business object that doesn't maintain the conversational state with the client.
  20. Abbreviate the term JMS?
  21. An entity bean's local interface MUST extend the ________ interface.
  22. Do clients of EJB instantiate beans directly?
  23. EJB applications are deployed on a ____ compliant Application Server.
  24. EJB is a framework for _____
  25. For remote objects Java passes objects:
  26. How many types of enterprise bean in java?
  27. How many types of session bean?
  28. If you wanted to control the WebLogic Server EJB’s configuration, what is one of the files you would use?
  29. In passivation, the opposite method from ejbPassivate() is _______.
  30. In passivation, the opposite method from ejbPassivate() is _______.
  31. In which model, one message is delivered to all subscribers?
  32. Message Driven Bean (MDB) encapsulates business logic. It is invoked by passing the message. It is like JMS receiver.
  33. OpenEJB 3.1.1 supports
  34. remove() method of the Entity bean?
  35. The Spring support classes facilitate building session beans
  36. The _______ file is an XML file used to describe the properties of a bean.
  37. The _______ file is an XML file used to describe the properties of a bean.
  38. The _______ is the most common exception class.
  39. The _______ is the most common exception class.
  40. What are ACID transactions responsible for?
  41. What are the advantages of JMS?
  42. What bean represents real-world objects?
  43. What does it mean when business objects have a state?
  44. What file format are all of the descriptor files in?
  45. What format is the deployment descriptor document in?
  46. What is another name for a deployment descriptor?
  47. What is CMC?
  48. What is concurrency control?
  49. What is concurrency control?
  50. What is returned by the method ejbCreate() CMP bean?
  51. What is RMI-IIOP?
  52. When injection is not available, what is the alternative?
  53. Where are the EJB classes utilized by applications retained?
  54. Which component does the Entity bean represent the persistent data stored in the database?
  55. Which of the following contains the EJB container that provides the services for the EJB component?
  56. Which of the following statements is not correct for an Enterprise Java Bean?
  57. Which statement about session beans is true?
  58. ______ is a messaging service to create, send and receive messages asynchronously.
  59. ______ is not a tag used in an XML bean archive to define a primitive type.
  60. ________ encapsulates business logic.
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