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NEW QUESTION 29
Given:
Which statement is equivalent to line 1?
- A. double totalSalary = list.stream().mapToDouble(e > e.getSalary() * ratio).reduce(starts, bo);
- B. double totalSalary = list.stream().map(e > e.getSalary() * ratio).reduce (bo).ifPresent (p > p.doubleValue());
- C. double totalSalary = list.stream().mapToDouble(e > e.getSalary() * ratio).sum;
- D. double totalSalary = list.stream().map(Employee::getSalary * ratio).reduce (bo).orElse(0.0);
Answer: D
Explanation:
NEW QUESTION 30
Given the code fragment:
Which action enables Computatorclass to compile?
- A. change Line 2 to public Double sum ( C collection) {
- B. change Line 4 to for (Double n : collection) {
- C. change Line 1 to add throws NumberFormatException
- D. change Line 3 to Double sum = 0.0;
- E. change Line 5 to List<Double> numbers = List.of(5, 4, 6, 3, 7, 2, 8, 1, 9);
Answer: A
NEW QUESTION 31
Which describes a characteristic of setting up the Java development environment?
- A. Setting up the Java development environment requires that you also install the JRE.
- B. Setting up the Java development environment occurs when you install an IDE before the JDK.
- C. The Java development environment is set up for all operating systems by default.
- D. You set up the Java development environment for a specific operating system when you install the JDK.
Answer: B
NEW QUESTION 32
Given:
What is the result?
- A. 0
- B. 1
- C. nothing
- D. 0 4 9
Answer: C
NEW QUESTION 33
var numbers = List.of(0,1,2,3,4,5,6,7,8,9);
You want to calculate the average of numbers. Which two codes will accomplish this? (Choose two.)
- A. double avg = numbers.stream().parallel().averagingDouble(a -> a);
- B. double avg = numbers.stream().mapToInt (i -> i).average().parallel();
- C. double avg = numbers.parallelStream().mapToInt (m -> m).average().getAsDouble ();
- D. double avg = numbers.stream().average().getAsDouble();
- E. double avg = numbers.stream().collect(Collectors.averagingDouble(n -> n));
Answer: C,D
Explanation:
NEW QUESTION 34
……
