EJB Interview Questions & Answers
EJB Interview Online Test
1. What are the two important TCP Socket classes?
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2. What technologies are included in J2EE?
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3. What is the difference between EJB and Java beans?
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4. What is EJB role in J2EE?
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5. What is Enterprise JavaBeans (EJB) container?
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6. What is in-memory replication?
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7. What is Ripple Effect?
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8. What is a Clone?
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9. What are the types of Scaling
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10. What is a Server Group?
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11. What is the new basic requirement for a CMP entity bean class in 2.0 from that of ejb 1.1?
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12. whats new in the EJB 2.0 specification?
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13. How can I access EJB from ASP?
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14. What is the relationship between local interfaces and container-managed relationships?
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15. What is EJBDoclet?
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16. What is the difference between session and entity beans?
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17. Is it legal to have static initializer blocks in EJB?
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18. What are transaction isolation levels in EJB?
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19. Can Entity Beans have no create() methods?
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20. When should I adopt BMP and when I should use CMP?
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21. Can I develop an Entity Bean without implementing the create() method in the home interface?
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22. What is the need of Remote and Home interface. Why cant it be in one?
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23. What is bean managed transaction?
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24. What is an EJB Context?
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25. How can I call one EJB from inside of another EJB?
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26. What happens if remove( ) is never invoked on a session bean?
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27. Can the primary key in the entity bean be a Java primitive type such as int?
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28. What is an EJB Context?
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29. What happens if remove( ) is never invoked on a session bean?
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30. How EJB Invocation happens?
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31. How does a servlet communicate with a JSP page?
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32. What is abstract schema?
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33. What is local interface. How values will be passed?
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34. What is Message Driven Bean?
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35. What are the call back methods in Entity bean?
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36. What are the services provided by container?
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37. What is deployment descriptor?
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38. How many EJB Objects are created for a Bean?
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39. What is re-entrant. Is session beans reentrant. Is entity beans reentrant?
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40. Can i map more than one table in a CMP?
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41. Is Decorator an EJB design pattern?
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42. What is the difference between sessioncontext and entitycontext?
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43. Does stateless Session bean create() method contain any parameters?
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44. What is difference between EJB 1.1 and EJB 2.0?
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45. What is the difference between ejbCreate() and ejbPostCreate
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46. Why does EJB needs two interfaces(Home and Remote Interface)
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47. What are the optional clauses in EJB QL?
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48. Can I invoke Runtime.gc() in an EJB?
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49. What is Remote client view?
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50. What is Local client view?
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51. What is EJB client JAR file?
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52. What is EJB container?
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53. What is Deployment descriptor?
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54. What is EJB server?
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