Tag: technology

Questions Related to technology

You want to locate an existing bean object but do not want to create a new instance, if an existing instance is not available. Which of the following bean attributes will you use in the jsp:useBean action?
technology programming languages

  1. class

  2. type

  3. beanName

  4. class and type

  5. beanName and type

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Correct Option: B

A container-managed persistence (CMP) entity bean A has a one-to-many unidirectional relationship (CMR) to another container-managed persistence (CMP) entity bean B. Which interface can expose the methods related to this relationship?

technology programming languages

  1. Only local interface of bean A

  2. Local interfaces of both beans A and B

  3. Only local home interface of bean A

  4. Local home interfaces of both beans A and B

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Correct Option: A

Which method cannot be called by a stateful session bean using bean-managed transactions?
technology programming languages

  1. getUserTransaction()

  2. getRollbackOnly()

  3. getStatus()

  4. None of these

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Correct Option: B

Which of the following statements are true about the given method declaration? MyEJBObject createWithName(String name) throws CreateException, RemoteException

technology programming languages

  1. It is declared in the local home interface of a stateful session bean.

  2. It is declared in the local home interface of a stateless session bean.

  3. It is declared in the remote home interface of a stateful session bean.

  4. It is declared in the remote home interface of a stateless session bean.

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Correct Option: C

Select all correct statements.
technology programming languages

  1. EJBs are not allowed to open a socket to connect to a FTP server and download a document.

  2. EJBs are not allowed to log an error to a file on disk.

  3. EJBs are allowed to install a new security manager when they have to perform highly secure jobs.

  4. EJBs are allowed to invoke Class.getResource in order to retrieve bundled resources (images, texts, properties, etc).

  5. EJBs are allowed to create small java.awt.Window components in order to display business processing errors or exception messages.

  6. EJBs are allowed to spawn their own threads in order to perform some time-consuming tasks, for example.

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Correct Option: B,D

Which of the following combinations (Design Pattern - Functionality) regarding Design Patterns is correct?
technology programming languages

  1. Business Delegate - Reduces the coupling between presentation-tier clients and business services.

  2. Data Access Object - Multiple View using the same model.

  3. MVC - Enables easier migration to different persistence storage implementation.

  4. Value Object - Reduces Network Traffic

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Correct Option: D

Classes in Java cannot be made static.
technology programming languages

  1. True

  2. False

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Correct Option: B

In Static inner classes, the data members and the member functions are by default static.
technology programming languages

  1. True

  2. False

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Correct Option: B

Annonymous Inner classes are not possible within an Interface.
technology programming languages

  1. True

  2. False

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Correct Option: B

Classes can be created at the runtime. ie; A class during its execution can create another class at the runtime, give it methods,decide what parameters should go into those methods, which all interfaces it should implement etc...
technology programming languages

  1. True

  2. False

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Correct Option: A