Technology Questions

By using method.

The method used to get the data is called getter method.

Number, String, Boolean, Function, Object, Null, Undefined.

- Frames make it easier to navigate through a site. 

- The links that appear in the frame can appear through out the site.

ClassName refName = new ClassName();

or

ClassName refName;

refName = new ClassName();

Anonymous class is class without name.

EX:

class A {

}

class Demo {

    A r = new A() {

        }; //anonymous class

}

advantages: view is used to retrieve the data very fastly from the database tables
* memory wastage is reduced
* faster than joins to retrieve the data from database tables

disadvantages:
* view is not a container,it will not hold the data
* view memory is not permanent memory

A delegate declares a ref type that references a named of anonymous method. Delegates are secure and type-safe. Consider them as type safe function pointers.

Oracle NOT NULL is used on a column to ensure that the value for that column can never be NULL.
Example:
Below, the constraint is that the id should never be NULL. If it is, oracle throws an error.
create table employee ( id number NOT NULL, Name varchar(200) );