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GIAC GSSP-Java Exam Practice Questions (P. 5)

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Question #21
Which of the following statements is true about the Java synchronized keyword?
  1. A
    It prevents multiple threads from accessing a block of code at the same time.
  2. B
    It allows the class to be loaded as soon as the JRE starts.
  3. C
    It prevents multiple developers from code redundancy.
  4. D
    It allows two different functions to execute in a shared manner.

Correct Answer:
A

Question #22
Mark works as a Programmer for InfoTech Inc. He develops a Web application that takes input from users. Which of the following methods can be used by the client and server to validate the users input?
Each correct answer represents a complete solution. Choose all that apply.
  1. A
    Validation through Servlets on the server side
  2. B
    Validation using JavaScript on the client side
  3. C
    Validation through Java Applets on the client side
  4. D
    Validation through XML on the server side

Correct Answer:
AB

Question #23
Which of the following are marker interfaces?
Each correct answer represents a complete solution. Choose all that apply.
  1. A
    The Clonable interface
  2. B
    The Serializable interface
  3. C
    The Comparable interface
  4. D
    The Runnable interface

Correct Answer:
AB

Question #24
Which of the following rules must be followed while determining a class loader?
Each correct answer represents a complete solution. Choose all that apply.
  1. A
    A new instance of the AppletClassLoader is used while loading the first class of an applet.
  2. B
    If the request to load a class is triggered by a reference to it from an existing class, the class loader for the existing class is asked to load the class.
  3. C
    A new instance of the URLClassLoader is used while loading the first class of an application.
  4. D
    The primordial class loader is used if java.lang.Class.ForName is directly called.

Correct Answer:
ABCD

Question #25
Mark works as a Programmer for InfoTech Inc. He wants to develop a JMS API application that is used as a messaging service application. He writes the following createSession() method. session = connection.createSession(false, 2);
Which of the following statements are true about the syntax?
Each correct answer represents a complete solution. Choose all that apply.
  1. A
    The client acknowledges a consumed message by calling the message's acknowledge method.
  2. B
    The acknowledge method can reduce session overhead by minimizing the work the session does to prevent duplicates.
  3. C
    This method instructs the session to lazily acknowledge the delivery of messages.
  4. D
    The session automatically acknowledges a client's receipt of a message.
  5. E
    If a message consumer consumes eight messages and then acknowledges the fourth message delivered, all eight messages are acknowledged.

Correct Answer:
AE

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