Understanding TreeMap in Java

What does the Map interface in Java do?

• Groups elements in a collection.

• Sorts elements in a collection.

• Ensures unique elements in a collection.

• Maps keys to values in a collection.

Why doesn't TreeMap have an 'add' method?

• Because TreeMap uses a 'push' method to add elements.

• Because elements are added using the 'insert' method.

• Because TreeMap automatically adds elements.

• Because elements are added using the 'put' method.

What are the generics used in the TreeMap declaration in the tutorial?

• Double and String

• String and Integer

• Integer and String

• Character and Integer

What is the purpose of using generics in a TreeMap?

• To allow the storage of different types of objects.

• To make the map compatible with all data types.

• To increase the processing speed of the map.

• To specify the type of elements stored in the map.

What method is used to check if a key exists in a TreeMap?

• 'hasKey'

• 'containsKey'

• 'findKey'

• 'checkKey'

How do you retrieve an element from a TreeMap?

• Using the 'get' method with the key.

• Using the 'search' method with the key.

• Using the 'remove' method with the key.

• Using the 'find' method with the value.

What happens if you put a new value with an existing key in a TreeMap?

• Both values are kept in the TreeMap.

• The TreeMap ignores the new value.

• The TreeMap throws an exception.

• The new value overwrites the existing value.

How does TreeMap order its elements?

• By value in ascending order.

• By key in descending order.

• By value in descending order.

• By key in ascending order.