Oracle 1Z0-819 Online Practice Questions and Exam Preparation

Oracle 1Z0-819 Online Questions & Answers

• Question 31:

  Given:

  

  What is the result?

  A. 385
  B. 3
  C. The compilation fails.
  D. 80
  E. 25
  D. 80

• Question 32:

  Given:

  

  What is the result?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  A. Option A

• Question 33:

  Given: What is the output?

  

  A. Short value 25
  B. The compilation fails due to an error in line 1.
  C. Byte value 25
  D. Object value 25
  D. Object value 25

• Question 34:

  Given:

  

  What is the result?

  A. The compilation fails.
  B. Y@>
  C. Null
  D. HH
  B. Y@>

• Question 35:

  Given:

  

  Why does this compilation fail?

  A. The method Y. print (object) does not call the method super.print (object)
  B. The method x. print (object) is not accessible to Y.
  C. In method x. print (Collection), system. Out :: prints is an invalid Java identifier.
  D. The method print (object) and the method print (object...) are duplicates of each other.
  E. The method Y. print (object...) cannot override the final method x.print (object....).
  E. The method Y. print (object...) cannot override the final method x.print (object....).

• Question 36:

  Given the code fragment:

  var pool = Executors.newFixedThreadPool(5);

  Future outcome = pool.submit(() > 1);

  Which type of lambda expression is passed into submit()?

  A. java.lang.Runnable
  B. java.util.function.Predicate
  C. java.util.function.Function
  D. java.util.concurrent.Callable
  D. java.util.concurrent.Callable

• Question 37:

  Given the code fragment:

  

  You want to validate a path name before the read file. Before validation, all path names should be canonicalized. Which code inserted on line n1 will accomplish this?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  B. Option B

• Question 38:

  Given the code fragment:

  

  What is the result?

  A. [Red:75, Red: 100, Yellow:50, Yellow:75]
  B. [Yellow:75, Yellow:50, Red:100, Red:75]
  C. An Exception is thrown at runtime.
  D. [Yellow:50, Yellow:75, Red:75, Red:100]
  E. [Red:100, Red:75, Yellow:75, Yellow:50]
  D. [Yellow:50, Yellow:75, Red:75, Red:100]

• Question 39:

  Given the code fragment:

  

  What is the result?

  A. [Lettuce, Kale]
  B. A compilation error is thrown.
  C. [Lettuce, Kale] [Seabass, Salmon]
  D. [Kale, Lettuce] [Salmon, Seabass]
  C. [Lettuce, Kale] [Seabass, Salmon]

• Question 40:

  Given the code fragment:

  

  What change on line 1 will make this code compile?

  A. Add catch (L |N e).
  B. Add catch (L |M N e).
  C. Add catch (L e).
  D. Add catch (N | L | M e).
  E. Add catch (M |L e).
  C. Add catch (L e).