1Z0-809 Free Practice Test

Given the code fragment:
ZonedDateTime depart = ZonedDateTime.of(2015, 1, 15, 3, 0, 0, 0, ZoneID.of(“UTC-
7”));
ZonedDateTime arrive = ZonedDateTime.of(2015, 1, 15, 9, 0, 0, 0, ZoneID.of(“UTC-
5”));
long hrs = ChronoUnit.HOURS.between(depart, arrive); //line n1 System.out.println(“Travel time is” + hrs + “hours”);
What is the result?

1. A. Travel time is 4 hours
2. B. Travel time is 6 hours
3. C. Travel time is 8 hours
4. D. An exception is thrown at line n1.

Correct Answer: A

Given:
class CheckClass {
public static int checkValue (String s1, String s2) { return s1 length() – s2.length();
}
}
and the code fragment:
String[] strArray = new String [] {“Tiger”, “Rat”, “Cat”, “Lion”}
//line n1
for (String s : strArray) { System.out.print (s + “ “);
}
Which code fragment should be inserted at line n1 to enable the code to print Rat Cat Lion Tiger?

1. A. Arrays.sort(strArray, CheckClass : : checkValue);
2. B. Arrays.sort(strArray, (CheckClass : : new) : : checkValue);
3. C. Arrays.sort(strArray, (CheckClass : : new).checkValue);
4. D. Arrays.sort(strArray, CheckClass : : new : : checkValue);

Correct Answer: A

Given:
class Worker extends Thread { CyclicBarrier cb;
public Worker(CyclicBarrier cb) { this.cb = cb; } public void run () {
try { cb.await();
System.out.println(“Worker…”);
} catch (Exception ex) { }
}
}
class Master implements Runnable { //line n1 public void run () { System.out.println(“Master…”);
}
}
and the code fragment:
Master master = new Master();
//line n2
Worker worker = new Worker(cb); worker.start();
You have been asked to ensure that the run methods of both the Worker and Master classes are executed. Which modification meets the requirement?

1. A. At line n2, insert CyclicBarrier cb = new CyclicBarrier(2, master);
2. B. Replace line n1 with class Master extends Thread {
3. C. At line n2, insert CyclicBarrier cb = new CyclicBarrier(1, master);
4. D. At line n2, insert CyclicBarrier cb = new CyclicBarrier(master);

Correct Answer: C

Given:

and the code fragment:

Which definition of the ColorSorter class sorts the blocks list?

1. A. Option A
2. B. Option B
3. C. Option C
4. D. Option D

Correct Answer: B

In 2015, daylight saving time in New York, USA, begins on March 8th at 2:00 AM. As a result, 2:00 AM becomes 3:00 AM.
Given the code fragment:

Which is the result?

1. A. 3:00 – difference: 2
2. B. 2:00 – difference: 1
3. C. 4:00 – difference: 3
4. D. 4:00 – difference: 2

Correct Answer: B