Best EJB Interviews Questions for Freshers and Professional

Posted By EduStudy on 2018-08-22 3:58 AM

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Find Best Latest EJB Interviews Questions for Freshers and Professional

1. What is main difference between EJB 2.0 and EJB 3.0 ?
2. Can you name few annotation used in EJB 3.0 and what does the do ?
3. Does EJB 3.0 supports dependency Injection ?
4. How to call a EJB 3.0 bean from Servlet or JSP ?
5. What are the issues you face with EJB 3.0 ?
6. What is two phase commit? How do you manage distributed transaction in EJB?
7. What are the services provided by EJB container ?
8. What is advantage of putting business logic in EJB over stored procedure?
9. What was shortcomings of EJB 2.0 ?
10. Can we run EJB in web server like Tomcat ?
11. What is Enterprise Java Beans (EJB) in J2EE ? What is advantage of using EJB ?
12. Which of the beans available in EJB 3 are only called by clients ?
13. Why is it so to make the session beans into two parts one with interface and the other as impl to the
14. interface ? Or why session beans should be used through business interface ? ( EJB 3.0 Specific ).
15. What is business interface ?
16. Now in latest version of EJB the dependency injection is available , Do we still need JNDI lookups for getting
17. the business interface ?
18. What are the criteria for a method to be a life cycle method ?
19. How do you invoke EJB 3.0 from Servlet and JSP ?
20. Can we maintain state with a stateless session bean ?
21. Can we have instance fields in Stateless session bean ?
22. Can you inject Stateful beans into stateless session bean or Servlet ?
23. What could be wrong if instead of doing JNDI look up or EJB injection of a Bean named UserRemoteBean I
24. created the instance of the same in the follwing way UserRemoteBean urb=new UserRemoteBean(); and
25. started using it in the client application?
26. Can you pool stateful session beans ?
27. Why can't you have a stateful bean marked as @WebService ?
28. When was EJB developed?
29. Who took over EJB?
30. Enlist the Enterprise Beans types?
31. Enlist the Declarative Transaction types?
32. What are versions of EJB?
33. Enlist the changes in EJB 2.1 ?
34. Enlist the contents of Container. • Container contains?
35. Differentiate ‘Stateful Session’ from ‘Entity Bean’ ?
36. Which is more beneficial: Stateful or Stateless Bean?
37. Which is more beneficial: CMP or BMP?
38. How is consistency maintained by Stateful Session through transaction updates ?
39. Is ejbCreate () method mandatory while defining a Session Bean?
40. Define Context?
41. Define Initial Context?
42. Define SessionContext ?
43. Can remove () be a Stateless Session bean?
44. Is state maintained by a Stateless bean?
45. Can EJB made to handle multiple transactions?
46. Enlist the CallBack methods of Session Bean?
47. Enlist the CallBack methods of Entity Bean.
48. How can one EJB be called from within another EJB?
49. Differentiate Conversational from Non-conversational interactions?
50. Define EAR, WAR and JAR ?
51. Define ejb Create() and EjbPostCreate ()?
52. Differentiate Phantom from Un-repeatable?
    Define ACID Properties?
53. What do you mean by ‘Hot deployment’ ?
54. Enlist the technologies embraced in J2EE.
    What do you mean Enterprise JavaBeans (EJB) container?
55. What do you mean by in-memory replication?
56. Define Ripple Effect?
57. Define Clone?
58. Define Clone?
59. Differentiate, “find a method” from “select method” in EJB ?
60. What do you mean by abstract schema?
61. What do you mean by re-entrant? Can you say that session beans as re-entrant? Can entity beans be
62. specified as re-entrant?
63. What do you mean by EJB architecture?
64. What do you mean by EJB architecture?
65. How can Enterprise JavaBeans be accessed from Active Server Pages?
66. Is having static initializer blocks legal in EJB?
67. What changes have been made in EJB 2.0 specifications?
68. What do you mean by EJBDoclet?
69. What do you mean by EJB QL?
70. How does
71. EJB invocation take place?
72. Can more than a single table be mapped in CMP?
73. Are entity beans allowed to create () methods?

Tags: java interviews questions, ejb questions lists, interviews question list for ejb, ejb java question

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