____________ is the root interface for all the collection classes.a)collectionb)listc)iteratord)iterablee)stack

The correct answer is a) collection.

Explanation:

• Collection is the root interface in the Java Collections Framework. It defines the basic operations that can be performed on all collection types, forming the basis for other interfaces like List, Set, and Queue.
• Iterable is an interface that allows an object to be the target of the "for-each" statement, meaning it can be iterated, but it is not the root interface for all collection classes.
• Iterator is an interface to iterate over elements in a collection but does not represent a collection itself.
• List is a subtype of Collection that represents an ordered collection (sequence).
• Stack is a subclass of Vector that implements a last-in-first-out (LIFO) stack of objects and is not the root interface.

Thus, "Collection" is the root interface for all collection classes in Java.