The size of the arraylist will increase to 150 why because 
in arraylist the elements are reach to initial size of the 
array list then size will be increase to half of the 
capacity

same 100 since the count starts from 0 onwards its obcious
tat u wud have 101 elements

Abstract class is a class which has both complete 
incomplete methods. 

Interface is which can have only unimplemeted methods.

By Default all the Collection classes are serialized.And
Serializable is not a class its an Interface.

It is done by extending Serializiable class

This is sth which can be used for maintaining the data
silently. Like without refreshing the whole page you can
manage a part of page. 
This is very useful as it is supported by almost all of the
browsers.

This is used for maintaining the data
silently. by without refreshing the whole web page we can
manage a part of that current page page.

static trigger
the icon or window background is clicked or double-clicked
without moving the mouse

dynamic trigger
the icon is dragged and dropped onto another icon or window
background

hold trigger
the mouse button is held down on an icon or window background