doget,dopost,doput,dohead,dooption,dodelete,dotrace
doget method default method.

A reference variable is used to refer a particular object 
location which resides on a garbage collectable heap

cpp is a pure object oriented programming,where as java is 
not because it doen't support multiple inheritance

every one says java does not supports multiple inheritance 
but in java the multiple inheritance will be done .by using 
interface concept there the multiple inheritance will be 
done.

cpp had pointers
java does not had pointers

cpp is not 100% object oriented programming language,
because primitives are not objects in cpp, 
whereas java is said to be 100% pure object oriented
programing language, because we can convert the primitives
into objects by using the concept called 'wrapping'.

Cookies is used for identify to request.
if we disable the coookies then we cannot identify the 
request

If cookies are disabled in our browser, Session tracking 
gets failed.

To overcome this limitation URL Rewriting concept will be 
used.

to track web pages we can use

1. Cookies
2. URLRewriting
3. storing data in session
4. Using Hidden variable in form

if cookies are disable the session tracking gets failed it 
unable to identifies the clients previous request.

even cookies are disable we can maintain session with 
res.encodeURL("path") method.

If we disable the cookies in our webpage then the it cant
identify the clients request.because there will be no
jsessionid  for our request.So it fails to remember our req
on the server .so once again it creates the sessionid for
another req.

A Thread has the following life cycles states
1.New/Born state:When a thread is just instantiated we say 
that the thread is in born state.now it can not compete for 
CPU cycles.
2.Active state:When we call the start() on thread object a 
thread moves from born state to active state.Here the code 
associated with run() will be executed.
3.Blocked state:When the thread is temporarily keep out of 
ready queue,we say that the thread is in blocked state. In 
this state it can't compete for CPU cycles.
4.Dead state:When the thread execution is completed or 
forcibly terminate the thread, it will be moved to dead 
state.

When an object is created using Thread class,it is in the 
new state, when the start method is called the object goes 
into the runnable state from where the scheduler picks up 
and starts executing. If that process requires any resource 
it is picked and put to the blocked state and when the 
process finished that thread is in dead state.
states:
1 new
2 runnable
3 running
4 blocked
5 dead

We cannot restrict garbage collector that all depends on the
garbage collector engine

Yes, 

Garbage collection (GC) is a form of automatic memory 
management. The garbage collector, or just collector, 
attempts to reclaim garbage, or memory used by objects that 
will never be accessed or mutated again by the application. 
Garbage collection was invented by John McCarthy around 
1959 to solve the problems of manual memory management in 
Lisp.[1]

Final class can not  be inherited.

A class is said to be final when i dnt want my class to be 
extended by any class so that methods implementation cannot 
be changed.
For ex String is a final class

Locale locale = Locale.GERMANY;
    String string =
NumberFormat.getCurrencyInstance(locale).format(123.45);

you can use java regex pattern matchers to achieve that.

overloading takes place at compile time and overriding 
takes place at run time.

In overloading two function should have different signature
but overriding show have exactly same signature.

Overloading generally happens in same class but overriding
mandatory requires super and sub class to happen.

Compiler decides overloading at compile time but overriding
is detected at run time.

Overloading is called static polymorphism while overriding
is called dynamic polymorphism.

Overload :Deals single class bluebrint method selection 
by using diffent proto type
(static buinding)


Overriding :Deals sub and super class bluebrints method 
selection by using same proto type
(Dynamic buinding)

Over Loading : when two or methods share the same name but
paramater declaration are diffierent with in a class.
(ex:Compile time polymorpism)

Over ridding: when two or methods share the same name but
paramater declaration are also same in different classes.
(ex:run time polymorpism)

public is used so that it can be called easily from outside 
the scope of function.Static is used so that it can be 
easily called without using its object.

public means we are allowing the main method to be accessed
any where in the application.and is declared static because
jvm will look for the static one's once it completes the
loading the class.

As we know public means we can access the method from 
anywhere.Coming to static:- main() is a static method 
therefore it implies that there is no need of creating 
Object for that particular class to call this method.So 
that when ever u run the program the Jvm will search for 
main() in the class even there r no class objects created 
for this class.

public means-accessable from anywhere
static means-the point ,from where compilar can start its 
compilation without object.

we cannot inherit constructors.

we cannot inherit constructors.
because if we declare a constructor it must be a same name 
as its class name, but two class must have same name

DataOut is a contract for DataOutputStream, whose main
intension is to write primtive data types and String into
stream , by converting them into bytes.

using this interface we can give the values to the run time 
input

the size we specify is the limit

The size will be as equal to int size.

there is no restriction to store object in arraylist.it's 
default size is 10.wenever it's reaches the maximum size 
it's increase size(current capacity*3/2+1).

no limit

In java contains eight type of primitive data
type:byte,short,int,long,float,double,char,boolean..
In wrapper class is called converting ordinary variable into
objects.so this concept is used for collections in
java.because collection don't know data types..only object..

primitive datatypes will allocate some memory in accordance
with the type of the variable

Hi shailendra

Thnks for your response, but iam asking what is the 
difference between page and pagecontext implicit objects in 
jsp?

Thanks & Regards
    Vinod

Page Implicit Object :
8 type of Implicit object are genreted when JSP file is 
converted into Servlet 

8 type of Implicit Object are 
(1)Page
(2)pageContext
(3)application
(4)session
(5)exception
(6)config
(7)request
(8)responce


pagecontext is type of implicit Object 

in pageContext two method is available
(1)include
(2)forward


it is equvaalect in servlet to RequestDispatcher

pagecontext is used to include or forward to another resource,
PageContext is used to save the scoped objects
PageContext is used to hold the page scoped attributes

where as page is the instance of the generated servlet

Hi Ravikiran

Thanks for your quick response .

Thanks & Regards
    Vinodh.

page context is the apllication object,that can be used for 
entire aplication. and page config object is for one 
servlet generated object.

pageContext is used to get different scope objects like 
request,session,context etc. where as page object of jsp is 
used to refer the current page scope and can be compared 
with local variable declared.