Java Collections Framework Quiz

What is the purpose of the Collections Framework?

• To provide a unified architecture for representing and manipulating collections

• To provide a way to create arrays

• To define primitive data types

• To handle exceptions

Which interface in the Java Collections Framework represents an ordered collection of elements that can contain duplicate values?

• `Collection`

• `Map`

• `Set`

• `List`

What is the primary difference between a `List` and a `Set` in the Java Collections Framework?

• A `Set` allows duplicate elements, while a `List` does not

• A `List` is unmodifiable, while a `Set` is modifiable

• A `List` allows duplicate elements, while a `Set` does not

• A `Set` is indexed, while a `List` is not

Which class is typically used to implement a `List` in the Java Collections Framework?

• `HashMap`

• `ArrayList`

• `LinkedList`

• None of These

In the Java Collections Framework, which interface extends the `List` interface to provide more efficient insertions and deletions in the middle of the list?

• `Map`

• `Set`

• `Deque`

• `Queue`

What is the purpose of the `Map` interface in the Java Collections Framework?

• To store a collection of objects

• To provide a stack data structure

• To store unique elements

• To store key-value pairs

Which class is typically used to implement a `Map` in the Java Collections Framework?

• `HashMap`

• `ArrayList`

• `HashSet`

• `LinkedList`

What is the primary difference between a `HashMap` and a `TreeMap` in the Java Collections Framework?

• A `TreeMap` uses a linked list to store elements

• A `HashMap` is synchronized, while a `TreeMap` is not

• A `TreeMap` allows duplicate keys, while a `HashMap` does not

• A `HashMap` does not maintain order, while a `TreeMap` does

In the Java Collections Framework, which interface represents a collection of unique elements with no duplicates?

• `List`

• `Map`

• `Set`

• `Collection`

Which class is typically used to implement a `Set` in the Java Collections Framework?

• `HashMap`

• `HashSet`

• `LinkedList`

• None of These