Complete Java SE 8 Developer Bootcamp - Sets

The video tutorial explains the concept of sets in programming, focusing on their characteristics, such as not allowing duplicate elements and not maintaining order. It covers the HashSet and TreeSet implementations, demonstrating how they handle duplicates and order elements. The tutorial also highlights the importance of the equals and compareTo methods in managing set behavior and ordering.

What is a key characteristic of a set in Java?

• It allows duplicate objects.

• It uses an index to access elements.

• It maintains the order of elements.

• It does not allow duplicate objects.

Which method is used by a set to check for duplicate objects?

• compareTo

• equals

• toString

• hashCode

What happens when you try to add a duplicate element to a hash set?

• It silently ignores the duplicate.

• It replaces the existing element.

• It throws an exception.

• It adds the element again.

How does a tree set determine the order of its elements?

• Using the hashCode method

• Using the toString method

• Using the compareTo method

• Using the equals method

What is the natural order of elements in a tree set?

• Numbers, lowercase letters, capital letters

• Capital letters, numbers, lowercase letters

• Numbers, capital letters, lowercase letters

• Lowercase letters, numbers, capital letters