Download Upgrade to Java SE 8 OCP.1z0-813.ActualTests.2018-09-28.28q.tqb

Vendor: Oracle
Exam Code: 1z0-813
Exam Name: Upgrade to Java SE 8 OCP
Date: Sep 28, 2018
File Size: 2 MB
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Demo Questions

Question 1
Given the code fragment:
  
What is the result? 
  1. [x, x] 
    [x, x, x, x]
  2. [x, x] 
  3. [x] 
    [x, x] 
    [x, x, x]
  4. [x] 
    [x, x] 
    [x, x, x] 
    [x, x, x, x]
Correct answer: D
Explanation:
CyclicBarrier is a synchronization aid that allows a set of threads to all wait for each other to reach a common barrier point. CyclicBarriers are useful in programs involving a fixed sized party of threads that must occasionally wait for each other. The barrier is called cyclic because it can be re-used after the waiting threads are released. Reference: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/CyclicBarrier.html
CyclicBarrier is a synchronization aid that allows a set of threads to all wait for each other to reach a common barrier point. CyclicBarriers are useful in programs involving a fixed sized party of threads that must occasionally wait for each other. The barrier is called cyclic because it can be re-used after the waiting threads are released. 
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/CyclicBarrier.html
Question 2
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. 2:00 – difference: 1
  2. 3:00 – difference: 2
  3. 4:00 – difference: 3
  4. 4:00 – difference: 2 
Correct answer: D
Explanation:
Reference: http://docs.oracle.com/javase/8/docs/api/java/time/ZoneId.html
Reference: http://docs.oracle.com/javase/8/docs/api/java/time/ZoneId.html
Question 3
Which is true the regarding the java.nio.file.Path interface?
  1. Implementations of this interface are not safe for use by multiple concurrent threads.
  2. The interface extends the WatchService interface.
  3. Implementations of this interface are immutable.
  4. Paths associated with the default provider are not interoperable with the java.io.File class.
Correct answer: B
Explanation:
This interface extends Watchable interface so that a directory located by a path can be registered with a WatchService and entries in the directory watched. Reference: https://docs.oracle.com/javase/7/docs/api/java/nio/file/Path.html
This interface extends Watchable interface so that a directory located by a path can be registered with a WatchService and entries in the directory watched. 
Reference: https://docs.oracle.com/javase/7/docs/api/java/nio/file/Path.html
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