Which database does Facebook & Google use ?

Facebook has moved to a NoSQL database named HBase. Google uses their own system called BigTable. What is NoSQL ? NoSQL is a term used to designate databases which differ from classic relational databases. NoSQL database management systems are useful when working with a huge quantity of data when the data's nature does not require a relational model. The data can be structured, but NoSQL is used when what really matters is the ability to store and retrieve great quantities of data, not the relationships between the elements.

How To Use Keyboard as Mouse


Oh shit!! My mouse is not working... Now how will i complete my project?? How will i surf Facebook?
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Have u ever been on such situation? And all u gotta do is to wait till you get a new mouse.
Its just like a nightmare, isn't it?Well no more now, coz you can use your keyboard as your mouse.
It is easy to use your mouse as keyboard in Windows using the On Screen Keyboard utility, but it is
also possible to do the reverse.
Now enough lets jump into our topic.
 
For Windows XP Users:-
 
1. Go to Control Panel.
2. Then select Switch to Classic View.
3. Then select Accessibility Options.
4. Then select the Mouse Tab.
5. Select Use MouseKeys.
6. Click on OK.
7. Then activate NumberLock (by pressing the NumLk key).
8. You should hear a beep sound.
9. Now you can control the mouse pointer using the arrow keys on the numeric keypad.
 
For Windows 8, Windows 7 and Vista Users:-
 
1. Open Ease of Access Center by pressing the Start button(windows) , select Control Panel, select Ease of Access, and then press enter to select Ease of Access Center.
2. Select Make the mouse easier to use.
3. Under Control the mouse with the keyboard, select the Turn on Mouse Keys check box.
 
You can also increase the acceleration and speed of your mouse movements according to your needs.
You can alternately press the Alt+Shift+Num Lock combination to instantly activate the mouse keys.
For laptops, this will only work if your laptop keyboard has a numeric keypad or alternative keys with which you can use with the Number Lock Key or the Function key.
Hope this article may  help u.

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