Download Upgrade to Java SE 8 OCP.selftestengine.1z0-813.2020-03-05.1e.33q.vcex


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Exam Upgrade to Java SE 8 OCP
Number 1z0-813
File Name Upgrade to Java SE 8 OCP.selftestengine.1z0-813.2020-03-05.1e.33q.vcex
Size 1.96 Mb
Posted March 05, 2020
Downloads 24



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Demo Questions

Question 1
Given the code fragment:

  

Which should be inserted into the line n1 to print Average = 2.5? 

  • A: Stream str = Stream.of(1, 2, 3, 4);
  • B: IntStream str = IntStream.of(1, 2, 3, 4);
  • C: DoubleStream str = Stream.of(1.0, 2.0, 3.0, 4.0);
  • D: IntStream str = Stream.of(1, 2, 3, 4)



Question 2
Given the interface:

  

Which class implements IdGenerator in a thread-safe manner, so that no threats can get a duplicate id value during concurrent access?

  • A:
      
  • B:
      
  • C:
      
  • D:
      
  • E:
      



Question 3
Given the code fragment:

  

Which is the valid definition for the Greeter interface to enable the code fragment to print Kathy Welcome!?

  • A:
      
  • B:
      
  • C:
      
  • D:
      



Question 4
Given the code fragment:

  

What is the result? 

  • A: invalid
  • B: An exception is thrown at runtime. 
  • C: NULL
  • D: Compilation fails. 
  • E: blank



Question 5
Which is true the regarding the java.nio.file.Path interface?

  • A: Implementations of this interface are not safe for use by multiple concurrent threads.
  • B: The interface extends the WatchService interface.
  • C: Implementations of this interface are immutable.
  • D: Paths associated with the default provider are not interoperable with the java.io.File class.



Question 6
Given:

  

and the code fragment:

  

What is the result?

  • A: A compilation error occurs. 
  • B: 2000.0
  • C: 1500.0
  • D: 0.0



Question 7
Given the code fragment:

  

What is the result? 

  • A: Word: why what when
  • B: Words: why Word: Why what Word: why what when
  • C: Word: why Word: what Word: when
  • D: Compilation fails.



Question 8
Given the code fragment:

  

If exceptions occur when closing the FileWriter object and when retrieving the JString class object, which exception object is propagated up to the caller of the processFile method? 

  • A: java.lang.Exception
  • B: java.io.IOException
  • C: java.lang.ClassNotFoundException
  • D: java.lang.NoSuchClassException



Question 9
Given the code fragment:

  

and 

 
 
Which code fragment could you see to refactor the code from line 4 to 8 to use a Lambda expression? 

  • A: Vehicle v = new Vehicle(int speed) { System.out.print(“Fly at “ + speed); );
  • B: Vehicle v = int speed -> System.out.print(“Fly at “ + speed);
  • C: Vehicle v = (int speed) -> System.out.print(“Fly at “ + speed);
  • D: Vehicle v = speed -> {System.out.print(“Fly at “ + speed) };



Question 10
Given the code fragment:

  

What is the result? 

  • A: 0 0
  • B: 1 2
  • C: 1 4
  • D: A compilation error occurs








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