PASS GUARANTEED QUIZ 2025 UNPARALLELED ORACLE 1Z0-829: JAVA SE 17 DEVELOPER FREE SAMPLE QUESTIONS

Pass Guaranteed Quiz 2025 Unparalleled Oracle 1Z0-829: Java SE 17 Developer Free Sample Questions

Pass Guaranteed Quiz 2025 Unparalleled Oracle 1Z0-829: Java SE 17 Developer Free Sample Questions

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Oracle Java SE 17 Developer Sample Questions (Q47-Q52):

NEW QUESTION # 47
Given the code fragment:

Which action sorts the book list?

  • A. At Line n2, replace books,sort() with books.stream().sort(0.
  • B. At Line n2, replace compareTo () with compare ().
  • C. At line n1, convert books type to mutable ArrayList type.
  • D. At Line n1, convert type to mutable array type.

Answer: B

Explanation:
Explanation
The code fragment is trying to sort a list of books using the Collections.sort() method. The correct answer is D, because the compareTo() method is not the correct way to compare two objects in a Comparator. The compare() method is the correct way to compare two objects in a Comparator and return an int value that indicates their order1. The compareTo() method is used to implement the Comparable interface, which defines the natural order of objects of a class2. The other options are incorrect because they either do not change the type of the list, which is already mutable, or they do not use the correct syntax for sorting a stream, which requires a terminal operation such as collect()3. References: Comparator (Java SE 17 & JDK 17), Comparable (Java SE 17 & JDK 17), Stream (Java SE 17 & JDK 17)


NEW QUESTION # 48
Which statement is true about migration?