15.1.1. What is a Collection?

Try these first

1. 1.

   What is a Collection in Java?

   Hint

   Think about how you might group data in a program.

2. 2.

   Name a core advantage of using Collections.

   Hint

   Consider the issues related to type mismatch.

3. 3.

   What is the main function of a Collection in Java?

   • To store data elements in a fixed size
   • To group multiple elements into a single object
   • To perform arithmetic calculations

   Hint

   Focus on the purpose of collections.

4. 4.

   True or False: A List in Java allows duplicate elements.

   • True
   • False

   Hint

   Recall the characteristics of collections.

5. 5.

   Design a simple application using Java Collections that simulates a library with multiple lists of books, ensuring no duplicate entries.

   Hint

   Think of how you would keep track of available and lent books.

6. 6.

   Explain how you would implement a task manager that prioritizes tasks, ensuring no duplicate tasks are entered.

   Hint

   Consider how both the order of tasks and uniqueness are essential.