TestSample

What is the output of below code?

int x = 5;

System.out.println(x++);

System.out.println(x);

• 5

  5

• 6

  6

• 5

  6

• 6

  5

-Contains no duplicate elements.

-Can contain at most one Null value.

-Elements are not key-value pairs.

-Accessing an element can be almost as fast as performing a similar operation on an array.

Which of these classes provides the specified features?

• LinkedList

• TreeMap

• HashSet

• LinkedHashMap

• HashMap

Which of the following statement about Set is true?

• A HashSet cannot have a null value.

• Set allows duplicate values.

• Set allows null values but only single occurrence.

• Set extends the Java.util.collection interface.