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what is the cost difference of a same structure when it is constructed with brick masonary and when it is constructed with block masonary and concrete as a frame structure????????????????????????

1608


What is scala spark?

181


1)difference betwen debit and credit card? 2)what is repo rate 3) how many branches are there in kvb? 4)basic operation of all banks? 5)bank rate? 6)ATM? 7)types of accounts in a bank? 8) what is CRR and what its present cRR

1607


What is the function of javascript?

493


How are escape characters used as attribute?

536






What are the components that are configured as part of configuration of kpi data?

252


in material sub stution when we sell the sub stute material with main item price it will display the list of materials with main price or only one substute material is substuted automatically in first senario i practed it will display the list of materials but price taking it's oown price.in 2 case substute item is picking main item price but it is possible for only one substute item only.may question is it possible to display list of material case 2?thanking you in advance

1544


What is module with example?

497


what is meant by power and distribution transformer ?

1493


If you were to drill a circular hole in a sheet of metal and then heat the sheet, what would happen to the size of the hole?

649


4 down vote favorite share [g+] share [fb] share [tw] I am developing my site using server side sessions using redis as backend for saving the session. Now the issue which is bothering me is of user leaving the website without logging out. I mean user simply closes the browser which causes the cookie to be deleted. Now session of that user still exists on the server and will not be used again as new login requires creating a new session due to security reasons. To avoid the case where hacker steals the old cookie and use it after user login again with same old session id. In essence user leaves the website without explicitly logging out and his session will be deleted after certain time limit of inaccessibility. I am thinking time limit of 30-60 minutes. Also with every new request from user his cookie will also be updated to keep track of when the user last time accessed the site. But nowadays, people let site remain open for long time without accessing it. For example users open facebook and gmail in new tabs and forget about them for 2-3 hours and still they are not asked to login again. Is letting a 2-3 hours old cooke access the session secure? My concern is someone steals user cookie and use it 2-3 hours later. Thinking on this topic has also forced me to question how facebook manages security if user can use a session where they are not accessing it for long periods of time and still they remain logged in. Or is it not secure for me to keep logged in when am not accessing the site session for longer period of time? It can be the case also there is some pinging mechanism using which sites keep track of user having their site open in a browser and when browser closes they are notified and can work accordingly. My website is a social network and needs all those security and usage features which a social network may need. I am new to web security and web development in general and may be the case where my above questions may seem a little basic. If you feel that is the case kindly point to some good reference where I can read and find answers to my question.

1717


Why is there no "Save" button in the save dialog box?

1334


​​What is constructor expression in​​ nw​​ abap​​ 7.4?

614


The main line train starts at 5.00AM and the harbor line train starts at 5.02AM. Each train has the frequency of 10 minutes.If a guy goes in the morning at a random time what is the probability of he getting main line train?

885


Which package is imported by default?

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