1Z0-805 무료 덤프문제 온라인 액세스

What design pattern does the Drivermanager.getconnection () method characterize?

• A.Factory
• B.Singleton
• C.DAO
• D.composition

Which five items are provided by the Java concurrency utilities?

• A.Collection classes designed for concurrent access
• B.Counting semaphores
• C.High-performance, flexible thread pools
• D.Atomic variables
• E.Concurrent collection sorting implementations
• F.synchronized wrappers for collection classes in the java.util package,
• G.Asynchronous execution of tasks
• H.Dynamic adjustment of thread priorities

Which two statements are true about the walkFileTree method of the files class?

• A.By default, symbolic links are not automatically followed by the method.
• B.The file tree traversal is breadth-first with the given FileVisitor invoked for each file encountered.
• C.If the file is a directory, and if that directory could not be opened, the postVisitFileFailed method is invoked with the I/O exception.
• D.The maxDepth parameter's value is the maximum number of directories to visit.

Two companies with similar robots have merged. You are asked to construct a new program that allows the features of the robots to be mixed and matched using composition. Given the code fragments:
public class CrusherRobot {
public void walk () {}
public void positionArm (int x, int y, int z) {}
public void raiseHammer() {}
public void dropHammer() {}
}
public class GripperRobot {
public void walk() {}
public void moveArm (int x, int y, int z) {}
public void openGripper () {}
public void closeGripper() {}
}
When applying composition to these two classes, what functionality should you extract into a new class?

• A.A new BasicRobot class that provides walking.
• B.A new BasicRobotFactory class to construct instances of GripperRobot.
• C.A new BasicRobot class that combines gripping and hammering.
• D.A new BasicRobotFactory class to construct instances of CrusherRobot.

Which two statements are true?

• A.One step in implementing a factory is to add references from all the classes that the factory will merge.
• B.Using factory prevents your replication from being tightly coupled with a specific Singleton
• C.Factories are an example of the OO principle "program to an interface."
• D.Implementing a DAO often includes the use of factory.
• E.To be implemented properly, factories rely on the private keyword.