Oracle 1Z0-819 Online Practice Questions and Exam Preparation

Oracle 1Z0-819 Online Questions & Answers

• Question 201:

  Given:

  

  What needs to change to make these classes compile and still handle all types of Interface Worker?

  A. Replace Line 3 with public void addProcess (Worker w) {.
  B. Replace Line 1 with public class Main extends Thread {.
  C. Replace Line 2 with private List processes = new ArrayList();.
  D. Replace Line 3 with public void addProcess(T w) {.
  D. Replace Line 3 with public void addProcess(T w) {.

• Question 202:

  Given:

  

  and

  

  What is the result?

  A. A NullPointerException is thrown at run time.
  B. The compilation fails.
  C. 1 Null null
  D. 1
  E. A ClassCastException is thrown at run time.
  B. The compilation fails.

• Question 203:

  Given:

  

  Which two code fragments remove the elements from the original list? (Choose two.)

  

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

• Question 204:

  

  Which line of code results in a compilation error?

  A. line n1
  B. line n3
  C. line n2
  D. line n4
  D. line n4

• Question 205:

  Given:

  

  Which is true?

  A. The program fails to compile on line 10.
  B. The program fails to compile on line 13.
  C. The program fails to compile on line 11.
  D. The program compiles fine.
  B. The program fails to compile on line 13.

• Question 206:

  Given:

  

  And the code fragment:

  

  Which situation will occur on code fragment execution?

  A. Livelock
  B. Deadlock
  C. Race Condition
  D. Starvation
  D. Starvation

• Question 207:

  Given:

  

  When run and all three files exist, what is the state of each reader on Line 1?

  A. All three readers are still open.
  B. All three readers have been closed.
  C. The compilation fails.
  D. Only reader1 has been closed.
  C. The compilation fails.

• Question 208:

  Given: What is the result?

  

  A. The code prints nothing.
  C. 10
  D. 0 4 9
  E. 0 8
  E. 0 8

• Question 209:

  Given:

  var fruits = List.of("apple", "orange", "banana", "lemon");

  You want to examine the first element that contains the character n. Which statement will accomplish this?

  A. String result = fruits.stream().filter(f > f.contains("n")).findAny();
  B. fruits.stream().filter(f > f.contains("n")).forEachOrdered(System.out::print);
  C. Optional result = fruits.stream().filter(f > f.contains ("n")).findFirst ();
  D. Optional result = fruits.stream().anyMatch(f > f.contains("n"));
  B. fruits.stream().filter(f > f.contains("n")).forEachOrdered(System.out::print);

• Question 210:

  Given:

  

  Which code fragment on line 1 makes the m map contain the employee with the highest salary for each neighborhood?

  

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