Given the code fragment: class Book { String author; String title; Book(String authorname, String title) { this.author = authorname; this.title = title; } } class SortBook { public static void main(String[] args) { List books = List.of( new Book("A1", "T1"), new Book("A2", "T2"), new Book("A1", "T2")); // Line n1 books.sort((Book a, Book b) -> a.title.compareTo(b.title)); // Line n2 System.out.println(books); } } Which action sorts the book list?

A. At Line n2, replace books.sort() with books.stream().sort().

B. At Line n1, convert books type to mutable ArrayList type.

C. At Line n1, convert type to mutable array type.

D. At Line n2, replace compareTo() with compare().

Oracle

1Z0-829 · Question #12

1Z0-829 Question #12: Real Exam Question with Answer & Explanation

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Working with Arrays and Collections

Question

Given the code fragment:
class Book {
String author;
String title;
Book(String authorname, String title) {
this.author = authorname;
this.title = title;
}
}
class SortBook {
public static void main(String[] args) {
List<Book> books = List.of(
new Book("A1", "T1"), new Book("A2", "T2"), new Book("A1", "T2")); // Line n1
books.sort((Book a, Book b) -> a.title.compareTo(b.title)); // Line n2
System.out.println(books);
}
}
Which action sorts the book list?

Options

AAt Line n2, replace books.sort() with books.stream().sort().
BAt Line n1, convert books type to mutable ArrayList type.
CAt Line n1, convert type to mutable array type.
DAt Line n2, replace compareTo() with compare().

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Topics

#Collections#Lambda Expressions#Immutable Lists#Comparators

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