Online Access Free 1Z1-805 Exam Questions

Which statement creates a low-overhead, low contention random number generator that is isolated to a thread to generate a random number between 1 and 100?

• A.int i = ThreadLocalRandom.current().nextInt (1, 101);
• B.int i = (int) Match.random (1, 101);
• C.int i = new Random (). nextInt (100)+1;
• D.int i = (int) Math.random()*.nextInt(1, 101);
• E.int i = ThreadSaferandom.current().nextInt(1, 101);

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

Given the code fragment:
Locale loc1 = Locale.getDefault ();
ResourceBundle messages = ResourceBundle.getBundle("MessageBundle", loc1);
Which two statements are a valid way to re-assign a resource bundle to a different Locale?

• A.loc1 = ResourceBundle.getBundle ("MessageBundle", new Locale ("es", "ES"));
• B.messages = ResourceBundle.getBundle ("MessageBundle", Locale.CHINA);
• C.messages = ResourceBundle.getBundle ("messageBundle", new Locale ("es", "ES"));
• D.loc1 = ResourceBundle.getBundle ("MessageBundle", Locale.CHINA);

Which is a key aspect of composition?

• A.Creating abstract classes
• B.Implementing the composite interface
• C.Using inheritance
• D.Method delegation

Given the code fragment:
public static void main(String[] args) {
Path file = Paths.get("D:\\company\\report.txt");
try (SeekableByteChannel sbc = Files.newByteChannel(file,new OpenOption[]
sbc.position(5);
sbc.truncate(30);
} catch (IOException e) {
System.err.printin("Caught IOException: " + e.getMessage () } ;
}
}
What is the result if the report.txt file contains
Welcome to the world of Java?

• A.The contents of the file remain unchanged.
• B.A NonWritableChannelException is thrown at runtime.
• C.The file contains the first four characters.
• D.The file contains the first five characters.