Technology Questions

Oracle database comprises of three kinds of files:
- Datafiles
- Redo log files
- Control files

A unique constraint on a column uniquely identifies the record by a combination of one or more fields. Few unique constraint fields can have a NULL value as long as the combination of values is unique.

Example:
create table employee ( id number NOT NULL, dob DATE, professor_id NOT NULL, Name varchar(200) Constraint id_unique UNIQUE(id,dob) );

ABAP (Advanced Business Application Programming) is a high level programming language created by the German software company SAP. It is currently positioned as the language for programming SAP's Web Application Server, part of its NetWeaver platform for building business applications. Its syntax is somewhat similar to COBOL.

- Frames make it easier to navigate through a site. 

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

Non-static member class is a class defined inside outer class with out static modifier.

EX:

class A { // top level class or outer class

    ......

    class B { //non-static member class

    }

    .....

}

- SVG is the abbreviation for Scalable Vector Graphics and is recommended by W3C. 

- It is used to define vector-based graphics for the Web

- The graphics are defined in XML format

-An important quality of SVG graphics is that their quality is maintained even when they are zoomed or resized. 

- All the element and attributes of SVG files can be animated

By using method.

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

Java uses sand box security model.