Which statement correctly describes Iterable?

Which statement correctly describes Iterable?

• A. Iterable models a single element.
• B. Iterable provides an iterator to traverse the collection.
• C. Iterable is a concrete implementation of a sequence.
• D. Iterable duplicates elements on iteration.

Answer: (B)

The main idea here is that Iterable is a contract for anything that can be walked through. It doesn’t represent a single element; instead, it promises a way to obtain an iterator that can traverse the elements in the collection. The iterator is the separate object that actually steps through the elements one by one, typically exposing operations like hasNext and next (or equivalent) to move and yield values. This design lets the same iteration mechanism work over any underlying data structure that implements Iterable, whether it’s a list, a set, or another collection type. The other statements miss the point: Iterable isn’t a single element, it isn’t a concrete sequence implementation, and iterating doesn’t duplicate elements—the data in the collection determines what you see as you iterate.

The main idea here is that Iterable is a contract for anything that can be walked through. It doesn’t represent a single element; instead, it promises a way to obtain an iterator that can traverse the elements in the collection. The iterator is the separate object that actually steps through the elements one by one, typically exposing operations like hasNext and next (or equivalent) to move and yield values. This design lets the same iteration mechanism work over any underlying data structure that implements Iterable, whether it’s a list, a set, or another collection type. The other statements miss the point: Iterable isn’t a single element, it isn’t a concrete sequence implementation, and iterating doesn’t duplicate elements—the data in the collection determines what you see as you iterate.