15.4.2. Deque Interface

Try these first

1. 1.

   What does the Deque interface allow you to do?

   Hint

   Think of adding to the front and back.

2. 2.

   Name one method of the Deque interface.

   Hint

   These methods handle element addition and removal.

3. 3.

   Which of the following methods is NOT part of the Deque interface?

   • addFirst()
   • addMiddle()
   • removeFirst()
   • removeLast()

   Hint

   Think about methods that handle the ends of the collection.

4. 4.

   True or False: A Deque can only be accessed from one end.

   • True
   • False

   Hint

   Recall the features of FIFO and LIFO.

5. 5.

   Create a Java program that uses a Deque to simulate a simple undo feature for a text editor where actions can be pushed and popped.

   Hint

   Consider how user actions can be stored in a Deque.

6. 6.

   Design a queue system using Deque where high priority tasks are accessed first but regular ones need to wait. How would you manage this?

   Hint

   Think about task arrangements in a real-life scenario.