Technology Questions

The comparison operator that is used in SQL is '='. Comparison operators test whether two expressions are the same. Comparison operators can be used on all expressions except expressions of the text, ntext, or image data types.

%type is used to declare a field of a table while %rowtype is used to declare a record with the same type as specified in that table, view or cursor.

Example of %type:

DECLARE

         v_EmployeeName emp.ename%TYPE

Example of %rowtype

DECLARE

          v_empployee emp%ROWTYPE;

All indicate dataset out of space. SD37 - no secondary allocation was specified. SB37 - end of vol. and no further volumes specified. SE37 - Max. of 16 extents already allocated.

A class can have any number of constructors. If a class have more than one constructor, we call it as the constructor is overloaded.

Constructors use this to refer to another constructor in the same class with a different parameter list.

Constructors use super to invoke the superclass's constructor. If a constructor uses super, it must use it in the first line; otherwise, the compiler will complain.

Security is one of the major aspects which come with any application and service used by the user. Companies or organizations remain much more concerned with the security provided with the cloud. There are many levels of security which has to be provided within cloud environment such as:

• Identity management: it authorizes the application service or hardware component to be used by authorized users.

• Access control: permissions has to be provided to the users so that they can control the access of other users who are entering the in the cloud environment.

• Authorization and authentication: provision should be made to allow the authorized and authenticated people only to access and change the applications and data.

Classes that contain at least one pure virtual function are called as abstract base classes.