Selenium WebDriver with Java - Basics to Advanced and Frameworks - Implementing Set Interface

The video tutorial explains the set interface in Java, focusing on the HashSet class. It highlights the key differences between set and list interfaces, such as the acceptance of duplicate values and the order of elements. The tutorial provides practical examples to demonstrate how HashSet works, including adding and removing elements, and emphasizes the importance of using the set interface when duplicates are not desired. The video concludes with a brief mention of the Iterator interface, which will be covered in the next lecture.

What is a key characteristic of the Set interface?

• It is used for sorting elements.

• It does not allow duplicate values.

• It guarantees the order of elements.

• It allows duplicate values.

In which scenario would you prefer using a List over a Set?

• When you are working with unordered data.

• When you want to prevent duplicate entries.

• When you need to maintain the order of elements.

• When you need to store unique elements only.

Why might a Set be used in a mobile recharge scenario?

• To sort recharges by amount.

• To allow multiple recharges at once.

• To maintain the order of recharges.

• To ensure each recharge is unique and not duplicated.

What is a difference between Set and List regarding element order?

• Set does not guarantee the order of elements.

• Both Set and List guarantee the order of elements.

• List does not guarantee the order of elements.

• Set guarantees the order of elements.

How does HashSet handle duplicate values?

• It allows them and stores them in order.

• It sorts them before storing.

• It rejects them and only stores unique values.

• It allows them but does not maintain order.

What happens when you try to add a duplicate element to a HashSet?

• The duplicate is added at the end.

• The duplicate is ignored.

• The duplicate replaces the existing element.

• An error is thrown.

Which method is not available in HashSet due to lack of order guarantee?

• add()

• size()

• remove()

• get()