Where we use this scope objects... and what is the limit...

hi, i am new to this field... plz anybody help me....

Scope speaks about the lifetime of the attribute(Object)/Bean you have saved should it be in inside. there would different cases here
1). you can save it within the scope of HttpServletRequest.
2).you can save it within the scope of HttpServletSession.
3).you can save it within the scope of ServletContext.
case 1 would unable to save you to save attributes only under the scope of a single user Request.
case 2 once you save an attribute the attribute remains inside the session until it is destroyed/invalidated/timed out.
case3 Once you save your attribute the object remains uptil the end of application i.e until the application server is restarted.
Well about the limit theoritcally there is no limit to save all these data but in practical it all upto the servletcontainer(Web Server) to speak about the limits.

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I am new to ABAP .Can you please clarify the that what is the use of lock object and how to use the loct object .what is use of the Deque & Enque function modules .

hi ,
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Where we use this scope objects... and what is the limit...

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