Java Interview Questions

what is stateless
Refers to software that does not keep track of configuration settings, transaction information or any other data for the next session. When a program “does not maintain state” (is stateless) or when the infrastructure of a system prevents a program from maintaining state, it cannot take information about the last session into the next, such as settings the user chose or conditions that arose during processing.

The Perfect Example
The most ubiquitous stateless environment is the World Wide Web. The HTTP protocol, which is the communications vehicle for Web transactions, is stateless. After a Web page is delivered to the user, the connection is closed. Counter measures, such as the use of cookies, have been developed to maintain the state of a user moving from page to page on a Web site. Contrast with “stateful,” which means that continuity is maintained from session to session. See HTTP and cookie.

Q) What is cookie poisoning:
A) The modification of or theft of a cookie in a user’s machine by an attacker in order to release personal information. If the cookie contains username and password, thieves can use their own computers and confiscated cookies to enter victims’ accounts. See cookie.

Q) What is Cookies

A) Cookies Definition:                                                                                                                                       The cookie file is a file that resides on the client machine. It contains data passed from web sites, so that web sites can communicate with this file when the same client returns. The web site only has access to the part of the cookie file that represents the interaction with that particular web site. Clearly the cookie file has caused some issues with respect to privacy. Considering that as consumers, we do not know what information is being stored in the file, we should become concerned! The cookie file was first developed in order to help sites with the transaction process of the web. Without a cookie file, web sites are not able to track a single user’s path through a web site, thus a transaction that required multiple pages (as most do) would simply not be workable.

Some Examples of Cookies Click here: CookieExamples