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JAVA LIST OF JAVA KEYWORDS         KEYWORD:    PURPOSE     ABSTRACT : It declares that a class or method is abstract ASSERT : Used to specify assertions BOOLEAN : Declares that variable is a Boolean type BREAK : Used to exits a loop before the end of the loop is reached BYTE : Declares that variable is byte type CASE : To represent different conditions in a switch statement   CATCH : Used for handling exceptions CHAR : Declares that variable is a character type   CLASS : Signals the beginning of a class definition  CONST : This keyword is reserved by java but now it is not in use CONTINUE : Prematurely return to the beginning of a loop  DEFAULT : Default action in a switch statement DO : Begins a do while loop DOUBLE : Declares that variable is a double type ELSE : Signals the code to be executed when if condition executes to false EXTENDS : Specifies the class base from which the corr...

  Why do we cry while chopping the onions? Ever cut of an onion and started tearing up? Most people do. It turns out when you cut an onion, it releases a gas called,  Propanethiol S-oxide. When mixed with certain enzymes in the onion, it creates a sulfur gas. These gases then get to your eyes and create a mild acid which irritates the eyes. Normally, your body would signal you to close your eyes. This, of course, is not a good idea if you are cutting an onion. The next best thing your eyes can do is to make tears to protect the eyes. Rubbing your eyes is a bad idea, since your hands are likely full of the tear making onion juice. So how do you keep from tearing up? There are many theories out there. I’ve heard some have had luck burning a candle near the chopping site. (Don’t try that without an adult.) Wearing safety goggles, however, should reduce the tears every time. The whole process goes as follows:- Lachrymatory-factor sy...

NEED FOR DBMS? A Database is an organised, persistent collection of data of an organisation.    ·        The File Based System . File based system are an early attempt to computerize the manual filling system. For example, a manual file can be set up to hold all the correspondence relating to a particular matter as a project, product, task, client or employee. The manual filing system works well when the number of items to be stored is small.   ·        The Database Approach. A database is a persistent collection of logically related data . A DBMS controls access to this data and thus needs to provide feature for database creation, data manipulation such as data value modification, data retrieval, data integrity and security etc. Advantage.   1.    Reduction of redundancies   2.    Shared data   3.    Data independence   4. ...

The  air quality  in  Delhi , the capital of India, according to a  WHO  survey of 1600 world cities, is the worst of any major city in the world.   Air pollution  in India is estimated to kill 1.5 million people every year; it is the fifth largest killer in India. India has the world's highest death rate from  chronic respiratory diseases  and  asthma , according to the WHO. In Delhi, poor quality air irreversibly damages the lungs of 2.2 million or 50 percent of all children. Causes of poor air quality Motor vehicle emissions  are one of the causes of poor air quality. The  Badarpur Thermal Power Station , a coal-fired power plant built in 1973, is another major source of air pollution in Delhi. Despite producing less than 8% of the city's electric power, it produces 80 to 90% of the  particulate matter  pollution from the electric power sector in Delhi.During the  Great smog of Delhi  in N...

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