Section 2 Summary

Great!

You've completed another section of this quite challenging course. You've written two not-so-simple programs and delved into data structures with the principles of FIFO and LIFO. These are very useful data structures in certain situations. They may not be suitable for every solution, but in cases where you need to iterate from one end of the data structure, Queue and Deque are indispensable.

You're also starting to tackle quite complex and comprehensive practical assignments. Such knowledge can be easily applied in practice, and I can say that the data structures you've learned in this and the previous section are often used in real-world scenarios. I believe you understand how they are applied 🧐.

I've prepared a quiz for you that will help you recall and better internalize everything you've learned.

1. What is the primary principle of a `Queue` data structure?

2. Which Java interface is commonly used to implement a `Queue`?

3. Which of the following is a valid method for adding an element to the front of a `Deque` in Java?

4. What is the purpose of the `pop()` method in the `Stack` class?

5. In Java, what does it mean for a method to be deprecated?

6. What is the primary principle of a `Stack` data structure?

7. What is the purpose of the `offer()` method in the `Queue` interface?

8. In a `Queue`, what does the `poll()` method do?

Everything was clear?

Thanks for your feedback!

Section 2. Chapter 6