Java | Collections | The Inquisitive

Java - Collections

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Question 1

Which of these packages contain all the collection classes?

Question 2

What is Collection in Java?

A group of objects

A group of classes

A group of interfaces

None of the above

Question 3

Which of these interface is not a part of Java’s collection framework?

Question 4

Which of these interface must contain a unique element?

Question 5

List, Set and Queue __________ Collection.

Question 6

Which of the following is legacy class in java?

Question 7

Iterator and ListIterator can traverse over

Question 8

Which of these standard collection classes implements a dynamic array?

Question 9

Declare and construct an ArrayList with an initial capacity of 20 references to Object.

Object list(20) = new ArrayList() ;

ArrayList list[20] = new ArrayList() ;

ArrayList[Object] list = new ArrayList(20) ;

ArrayList<Object> list = new ArrayList<Object>(20) ;

Question 10

After the code has executed, what is the capacity of the list and size?

ArrayList<String> list = new ArrayList<String>(10) ;
list.add( "The" );
list.add( "Inquisitive" );
list.add( "Knowledge is Boundless" );

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