McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Master of Computer Applications (MCA) .
Chapters
| 1. |
Which statement correctly identifies the goals of the designers of the EJB architecture? |
| A. | The EJB architecture requires that users be aware of the low-level transaction details of the Java EE platform. |
| B. | The EJB architecture is the standard component architecture for building distributed business applications in the Java programming language. (*) |
| C. | Although the EJB architecture defines the contracts that enable tools to develop and deploy components, each application server vendor must produce its own set of additional tooling. |
| D. | The EJB architecture provides a standard way of persisting state data using the Java Persistence API, Java Data Objects, and JDBC. |
| Answer» B. The EJB architecture is the standard component architecture for building distributed business applications in the Java programming language. (*) | |
| 2. |
Which statement about life-cycle callback methods is correct? |
| A. | Life-cycle callback methods must be implemented in the bean class. |
| B. | Life-cycle callback methods can have public, private, protected, or packagelevel access. (*) |
| C. | A life-cycle callback method can only have a single callback annotation. In other words, you cannot define a single method and give it two different callback annotations. |
| D. | Life-cycle callback methods can be declared as static. |
| Answer» B. Life-cycle callback methods can have public, private, protected, or packagelevel access. (*) | |
| 3. |
Which of the following types of Enterprise Java Bean will be most likely to be difficult to port from one App Server to another? |
| A. | Stateful Session Beans |
| B. | Stateless Session Bean |
| C. | BMP (Bean Managed Persistence) Entity Bean |
| D. | CMP (Container Managed Persistence) Entity Bean |
| Answer» D. CMP (Container Managed Persistence) Entity Bean | |
| 4. |
Which interface should be implemented by a stateful session bean if it needs to synchronize its conversational state with the transactional context? |
| A. | javax.transaction.UserTransaction |
| B. | javax.ejb.SessionSynchronization |
| C. | javax.ejb.EJBContext |
| D. | javax.transaction.TransactionContext |
| Answer» B. javax.ejb.SessionSynchronization | |
| 5. |
Which of the following exceptions is thrown by the ejbLoad() method of an entity bean when the database row to be loaded is not found ? |
| A. | NoSuchEntityException |
| B. | EJBException |
| C. | RemoteException |
| D. | ObjectNotFoundException |
| Answer» A. NoSuchEntityException | |
| 6. |
Which of the following is the format for EJB deployment descriptor files? |
| A. | XML |
| B. | XSL |
| C. | HTML |
| D. | Java |
| Answer» A. XML | |
| 7. |
EJB is a |
| A. | Middleware |
| B. | Scalable component architecture |
| C. | Component architecture to integrate legacy systems |
| D. | All of the above. |
| Answer» D. All of the above. | |
| 8. |
Which of the following EJB has no state? i. Message-Driven Bean. ii. BMP Entity Bean. iii. Stateless Session Bean. iv. Stateful Session Bean. |
| A. | Both (I) and (II) above |
| B. | Both (II) and (III) above |
| C. | Both (III) and (IV) above |
| D. | Both (I) and (III) above. |
| Answer» D. Both (I) and (III) above. | |
| 9. |
Which of the following is true for EJB? |
| A. | EJB is server-side component architecture for distributed applications in Java |
| B. | EJB facilitates scalable, secure and transaction-oriented applications |
| C. | EJB supports portability and reusability |
| D. | All of the above. |
| Answer» D. All of the above. | |
| 10. |
Which of the following EJB type has no Remote interfaces? |
| A. | Message-Driven Bean |
| B. | BMP Entity Bean |
| C. | CMP Entity Bean |
| D. | none |
| Answer» A. Message-Driven Bean | |
| 11. |
Which role in EJB architecture is responsible for EJB Server? |
| A. | EJB Deployer |
| B. | Application Assembler |
| C. | Network Engineer |
| D. | Server Provider |
| Answer» D. Server Provider | |
| 12. |
Which of the EJB has a passive state in its life cycle? I. Stateless Session Bean. II. Message-Driven Bean. III. BMP Entity Bean. |
| A. | Only (I) above |
| B. | Only (II) above |
| C. | Only (III) above |
| D. | Both (I) and (II) above |
| Answer» C. Only (III) above | |
| 13. |
Which part of multi-tier enterprise application contains EJB component? |
| A. | Application Server |
| B. | Web Server |
| C. | Database Server |
| D. | Fat Client |
| Answer» A. Application Server | |
| 14. |
Which of the following distributed object technology is/are not included in Java? I. CORBA. II. DCOM. III. RMI. IV. EJB. |
| A. | Only (I) above |
| B. | Only (II) above |
| C. | Only (III) above |
| D. | Only (IV) above |
| Answer» B. Only (II) above | |
| 15. |
Which of the following is not a property of EJB transaction? |
| A. | Atomicity |
| B. | Consistency |
| C. | Isolation |
| D. | Distributed |
| Answer» D. Distributed | |
| 16. |
Which of the following is not true for servlet? |
| A. | It is persistent |
| B. | Platform independent |
| C. | High performance |
| D. | It is single threaded. |
| Answer» D. It is single threaded. | |
| 17. |
Which JSP tag is used to transfer processing to another JSP page? |
| A. | <jsp:include> |
| B. | <jsp:forward> |
| C. | <jsp:redirect> |
| D. | <jsp:useBean> |
| Answer» B. <jsp:forward> | |
| 18. |
Which of the following is an approach for state maintenance in Web applications? |
| A. | Hidden Form Field |
| B. | URL Rewriting |
| C. | Cookies |
| D. | All of the above. |
| Answer» D. All of the above. | |
| 19. |
Which of the following is not a container for EJB? I. Internet Information Server. II. Java System Application Server. III. Tomcat. IV. WebLogic. |
| A. | Both (I) and (II) above |
| B. | Both (II) and (III) above |
| C. | Both (III) and (IV) above |
| D. | Both (I) and (III) above. |
| Answer» D. Both (I) and (III) above. | |
| 20. |
Which EJB usually represents persistent data? |
| A. | Entity Bean |
| B. | Stateless Session Bean |
| C. | Stateful Session Bean |
| D. | Message-Driven Bean |
| Answer» A. Entity Bean | |
| 21. |
Which is least visibility scope for Java bean in JSP? |
| A. | Page |
| B. | Session |
| C. | Request |
| D. | Application |
| Answer» A. Page | |
| 22. |
Which of the following is/are true for JSP technology? I. It is persistent. II. Platform independent. III. Browser executes the code. |
| A. | Only (I) above |
| B. | Only (II) above |
| C. | Both (I) and (II) above |
| D. | Both (II) and (III) above |
| Answer» C. Both (I) and (II) above | |
| 23. |
Which of the following is true for JNDI? |
| A. | Database service |
| B. | Naming and Directory Service |
| C. | Network Service |
| D. | Web Service |
| Answer» B. Naming and Directory Service | |
| 24. |
Which method of the request object is used to extract values of the input fields in a form when it is submitted? |
| A. | getParameter |
| B. | getParameterNames |
| C. | getValues |
| D. | putValues |
| Answer» A. getParameter | |
| 25. |
Which of the following is true for CORBA? |
| A. | Protocol for distributed computing |
| B. | Database specification |
| C. | Specification for distributed objects |
| D. | Both (c) and (d) above. |
| Answer» D. Both (c) and (d) above. | |
| 26. |
Which EJB uses EJB-QL for query operations? |
| A. | BMP Entity Bean |
| B. | CMP Entity Bean |
| C. | Session Bean |
| D. | Message-Driven Bean |
| Answer» B. CMP Entity Bean | |
| 27. |
Which of the following is true for Java Bean? |
| A. | It can not be a GUI component |
| B. | It never implements serializable interface |
| C. | It has zero-argument constructor |
| D. | It is a distributed component |
| Answer» C. It has zero-argument constructor | |
| 28. |
Which of the following is not true for <jsp:useBean> tag in JSP page? |
| A. | Locates a bean instance |
| B. | Stores object reference of the bean in a variable |
| C. | Creates an instance if fails to locate the bean instance |
| D. | All the above. |
| Answer» D. All the above. | |
| 29. |
Which of the following is not an implicit object in JSP? I. Request. II. Session. III. Vector. IV. In. |
| A. | Both (I) and (II) above |
| B. | Both (II) and (III) above |
| C. | Both (I) and (III) above |
| D. | Both (III) and (IV) above. |
| Answer» D. Both (III) and (IV) above. | |
| 30. |
Which is not a valid scope for Java bean in JSP? |
| A. | Page |
| B. | Session |
| C. | Request |
| D. | Global. |
| Answer» D. Global. | |
| 31. |
Which two of the following is responsible to creates ejb-jar files? 1. The bean provider. 2. The application assembler. 3. The deployer. 4. The system administrator. |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 3 and 4 |
| D. | 4 and 1 |
| Answer» A. 1 and 2 | |
| 32. |
Which two of the following must be included in every ejb-jar file? 1. Stubs for the EJBHome and EJBObject interface. 2. The JAR Manifest file. 3. A deployment descriptor. 4. The JNDI context. 5. The EJB's home interface. |
| A. | 1 and 3 |
| B. | 2 and 5 |
| C. | 3 and 5 |
| D. | 4 and 2 |
| Answer» C. 3 and 5 | |
| 33. |
Which statement about session beans is true? |
| A. | In both stateless and statefull session classes, the bean provider must write the method public void remove() |
| B. | The method << remove >> in the component interface can be accessed only by the remote clients |
| C. | The bean’s handle must be provided by the client, in order to ask the EJBHome for removing a session bean |
| D. | None of the above |
| Answer» C. The bean’s handle must be provided by the client, in order to ask the EJBHome for removing a session bean | |
| 34. |
Which of the following can be directly invoked by the client? |
| A. | ejbPassivate |
| B. | business methods |
| C. | setSessionContext |
| D. | newInstance |
| Answer» B. business methods | |
| 35. |
Which is the method available in SessionContext interface? |
| A. | afterBegin() |
| B. | getRollbackOnly() |
| C. | setSessionCotext() |
| D. | getUserTransaction() |
| Answer» C. setSessionCotext() | |
| 36. |
Which statements about a session bean class are true? |
| A. | It is a final class |
| B. | Overloaded constructors are supported |
| C. | Their business methods can be 'private' |
| D. | The ejbCreate() method must not be a final method |
| Answer» D. The ejbCreate() method must not be a final method | |
| 37. |
Upon invoking getRollbackOnly() method by a business method in an entity bean, which transaction attribute settings will lead the ejb container to throw an exception? |
| A. | Required |
| B. | RequiresNew |
| C. | Never |
| D. | Mandatory |
| Answer» C. Never | |
| 38. |
When a session bean has container-managed demarcation value of 'Supports', which three methods run in an unspecified transaction context? 1. ejbActivate 2. getRollbackOnly 3. getUserTransaction 4. ejbRemove 5. afterBegin 6. afterCompletion |
| A. | 1,4,3 |
| B. | 4,2,6 |
| C. | 1,4,6 |
| D. | 2,5,6 |
| Answer» C. 1,4,6 | |
| 39. |
EJB system’s performance tuning is the responsibility of |
| A. | Bean Provider |
| B. | EJB Deployer |
| C. | Application Assembler |
| D. | Tool Vendor |
| Answer» B. EJB Deployer | |
| 40. |
The EJB Transaction Attribute that ensures the method call that always takes place in a transaction, either client started or container started’ are |
| A. | TX_SUPPORTS |
| B. | TX_MANDATORY |
| C. | TX_REQUIRED and TX_REQUIRES_NEW |
| D. | Either A or B |
| Answer» C. TX_REQUIRED and TX_REQUIRES_NEW | |
| 41. |
JMS is mainly used to send and receive message from one application to another. |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» A. True | |
| 42. |
Abbreviate the term JMS? |
| A. | Java Message Service |
| B. | Java Monitor Service |
| C. | Java Message Session |
| D. | Java Monitor Session |
| Answer» A. Java Message Service | |
| 43. |
A message driven bean is like statefull session bean that encapsulates the business logic and doesn't maintain state. |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» B. False | |
| 44. |
EJB QL is a Query Language provided for navigation across a network of enterprise beans and dependent objects defined by means of container managed persistence. |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» A. True | |
| 45. |
Which case of a session bean obtains the UserTransaction object via the EJBContext using the getUserTransaction() method in EJB transaction management? |
| A. | Bean-managed transactions |
| B. | Container-managed transactions |
| C. | Both A & B |
| D. | None of the above |
| Answer» A. Bean-managed transactions | |
| 46. |
Which services are provided to EJB components by the EJB container? |
| A. | Transaction support |
| B. | Persistence support |
| C. | Naming support |
| D. | All mentioned above |
| Answer» D. All mentioned above | |
| 47. |
Which EJB container must provide an implementation of Java Naming and Directory Interface (JNDI) API to provide naming services for EJB clients and components? |
| A. | Transaction support |
| B. | Persistence support |
| C. | Naming support |
| D. | All mentioned above |
| Answer» C. Naming support | |
| 48. |
Which session bean maintain their state between client invocations but are not required to maintain their state across server crashes or shutdowns? |
| A. | Stateful Session Bean |
| B. | Stateless Session Bean |
| C. | Singleton Session Bean |
| D. | None of the above |
| Answer» C. Singleton Session Bean | |
| 49. |
EJB is a specification for J2EE server, not a product; Java beans may be a graphical component in IDE. |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» A. True | |
| 50. |
A session bean represents a multiple clients inside the Application Server. |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» B. False | |
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