Oracle Oracle Certifications 1Z0-819 Questions & Answers

• Question 51:

  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).

  Correct Answer: C

• Question 52:

  You are working on a functional bug in a tool used by your development organization. In your investigation, you find that the tool is executed with a security policy file containing this grant.

  

  What action should you take?

  A. Nothing, because it is an internal tool and not exposed to the public.

  B. Remove the grant because it is excessive.

  C. Nothing, because it is not related to the bug you are investigating.

  D. File a security bug against the tool referencing the excessive permission granted.

  E. Nothing, because listing just the required permissions would be an ongoing maintenance challenge.

  Correct Answer: D

  Reference: https://wiki.sei.cmu.edu/confluence/display/java/ENV03-J+Do+not+grant+dangerous+combinations+of+permissions

• Question 53:

  Given:

  

  executed with this command: java Main one two three What is the result?

  A. 0). one

  B. 0). one1). two2). three

  C. The compilation fails.

  D. It creates an infinite loop printing:0). one1). two1). two...

  E. A java.lang.NullPointerException is thrown.

  Correct Answer: D

• Question 54:

  Given:

  

  You want to obtain the Stream object on reading the file. Which code inserted on line 1 will accomplish this?

  A. var lines = Files.lines(Paths.get(INPUT_FILE_NAME));

  B. Stream lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));

  C. var lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));

  D. Stream lines = Files.lines(INPUT_FILE_NAME);

  Correct Answer: C

• Question 55:

  Given: What is the result?

  

  A. 9001: java.io.FileNotFoundException: MyFile.txt-MyFile.txt

  B. 9001: APPLICATION ERROR-9001-MyFile.txt 9001: java.io.FileNotFoundException: MyFile.txt-MyFile.txt

  C. 9001: APPLICATION ERROR-9001-MyFile.txt

  D. Compilations fails at Line 1.

  Correct Answer: C

• Question 56:

  Given:

  

  What is the result?

  A. The compilation fails.

  B. 1.99,2.99,0

  C. 1.99,2.99,0.0

  D. 1.99,2.99

  Correct Answer: A

  

• Question 57:

  Given:

  

  Which is true?

  A. System.out is the standard output stream. The stream is open only when System.out is called.

  B. System.in cannot reassign the other stream.

  C. System.out is an instance of java.io.OutputStream by default.

  D. System.in is the standard input stream. The stream is already open.

  Correct Answer: D

  Reference: https://www.geeksforgeeks.org/java-lang-system-class-java/

• Question 58:

  Given the code fragment:

  

  Which two statement inserted independently at line 1 enable this code to print PRRT?

  A. i--;

  B. continue b;

  C. break b;

  D. j--;

  E. continue a;

  F. break a ;

  Correct Answer: CE

• Question 59:

  Given:

  

  Which statement is true about the Fox class?

  A. Fox class does not have to override inhabit method, so long as it does not try to call it.

  B. Fox class does not have to override the inhabit method if Forest and Town provide compatible implementations.

  C. Fox class must implement either Forest or Town interfaces, but not both.

  D. The inhabit method implementation from the first interface that Fox implements will take precedence.

  E. Fox class must provide implementation for the inhabit method.

  Correct Answer: B

• Question 60:

  Given:

  

  Which two are correct? (Choose two.)

  A. The output will be exactly 2 1 3 4 5.

  B. The program prints 1 4 2 3, but the order is unpredictable.

  C. Replacing forEach() with forEachOrdered(), the program prints 2 1 3 4 5, but the order is unpredictable.

  D. Replacing forEach() with forEachOrdered(), the program prints 1 2 3 4 5.

  E. Replacing forEach() with forEachOrdered(), the program prints 2 1 3 4 5.

  Correct Answer: BD