Understanding Java Set Interface

What does the Java Set interface guarantee about the elements it contains?

• The elements are ordered.

• The elements are sorted.

• The elements are duplicated.

• The elements are unique.

Which of the following is true about the Java List interface?

• All elements must be of the same type.

• It is unordered.

• It maintains an ordered collection of elements.

• It does not allow duplicate elements.

Which class is used to instantiate a Set that does not order its elements internally?

• HashSet

• TreeSet

• LinkedList

• ArrayList

What is the main difference between HashSet and TreeSet?

• HashSet allows duplicate elements.

• TreeSet does not allow null elements.

• TreeSet is faster than HashSet.

• HashSet does not order its elements internally.

What is the purpose of specifying a generic type when creating a Set?

• To allow any type of elements.

• To restrict the type of elements that can be added.

• To increase the size of the Set.

• To make the Set ordered.

What does the add method return when trying to add a duplicate element to a Set?

• UnsupportedOperationException

• True

• NullPointerException

• False

Which method is used to iterate over elements in a Set using Java Streams API?

• forEach

• iterator

• while loop

• stream.forEach

How can you check if a Set contains a specific element?

• contains()

• find()

• search()

• locate()

How do you remove all elements from a Set?

• clear()

• deleteAll()

• removeAll()

• emptySet()

How can you convert a Set to a List?

• Sets cannot be converted to Lists.

• Using the convert() method.

• By adding all elements from the Set to a List.

• By using the Set.toList() method.