Oracle Oracle Certifications 1Z0-819 Questions & Answers

• Question 31:

  Given:

  

  Which statement is equivalent to line 1?

  A. double totalSalary = list.stream().map(e > e.getSalary() * ratio).reduce (bo).ifPresent (p > p.doubleValue());

  B. double totalSalary = list.stream().mapToDouble(e > e.getSalary() * ratio).sum;

  C. double totalSalary = list.stream().map(Employee::getSalary * ratio).reduce (bo).orElse(0.0);

  D. double totalSalary = list.stream().mapToDouble(e > e.getSalary() * ratio).reduce(starts, bo);

  Correct Answer: C

  

• Question 32:

  Examine this excerpt from the declaration of the java.se module: What does the transitive modifier mean?

  

  A. Only a module that requires the java.se module is permitted to require the java.sql module.

  B. Any module that requires the java.se module does not need to require the java.sql module.

  C. Any module that attempts to require the java.se module actually requires the java.sql module instead.

  D. Any module that requires the java.sql module does not need to require the java.se module.

  Correct Answer: A

• Question 33:

  Given:

  

  and the code fragment:

  Which two Map objects group all employees with a salary greater than 30 by neighborhood? (Choose two.)

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  E. Option E

  Correct Answer: A

• Question 34:

  Given:

  

  and

  

  Which two method definitions at line n1 in the Bar class compile? (Choose two.)

  A. public List foo(Set m) {...}

  B. public List foo(Set m) {...}

  C. public List foo(TreeSet m) {...}

  D. public List