Mastering Java: The Ultimate Quiz for 'Thinking in Java'

What does the java.util.RandomAccess interface indicate?

1. The class supports efficient random access

2. The class can be accessed in a multithread environment

3. The class implements a randomized data access strategy

4. The class uses a random number generator for indexing

The correct answer is: The class supports efficient random access

The java.util.RandomAccess interface indicates that the class supports efficient random access, meaning that items in the collection can be accessed in any order with equal efficiency. Option B is incorrect because the interface does not pertain to multithreading. Option C is incorrect because it refers to a data access strategy, rather than the class itself. Option D is incorrect because the interface does not necessarily involve a random number generator, it simply indicates efficient random access.