Technology Questions

BlackBerry Enterprise Server: The BlackBerry handhelds are integrated into the e-mail system of the organization through software BlackBerry Enterprise Server. The BES versions are available for MS Exchange, Novell GroupWise and Lotus Domino. A connector was made by Google for BES for making BES available for Google Apps. A new feature is added which enables to track the current location of an individual through trailateration.

BES provides handhelds with the connectivity of TCP/IP which can be accessed through a component known as “Mobile Data Service – Connection Service – MDS-CS. This allows the development of custom application development using data streams on BlackBerry devices which are based on the Sun JME platform.

BES also provides network security in the form of Triple DES or AES encryption standard of all data including e-mail and MDS traffic, which travels between the BlackBerry hand held devices and a BES.

Following are the steps to create a simple AD rotator script without using database in PHP:

- All the ad’s can be collected in one place and be displayed randomly.rand() function can be used for this purpose.

- In order to NOT use any database, a flat file can be used to store the ad’s.

- In order to store the Ad’s information (HTML code), a flat file say “ad.txt” can be created.

- The random number can be stored in a variable 

$result_random=rand(1, 100);

- Conditions can be checked to display the ad’s.

if($result_random<=70)

{

      echo "Display ad1";

}

The security laws which are implements to secure data in the cloud are as follows:

- Input validation : controls the input data which is being to any system.

- Processing  : control that the data is being processed correctly and completely in an application.

- File : control the data being manipulated in any type of file.

- Output reconciliation : control the data that has to be reconciled from input to output.

- Backup and recovery: control the security breaches logs and the problems which has occurred while creating the back.

Personal Oracle lite is single user database for distributed and mobile computing. It supports a full range of Java database features as well as advanced replication. Or in other words it is Oracle's lightweight, fully-functional, single-user object- relational database. A small, zero administration embedded database.

Some of the features supported:

- Java Support

- Java Store Procedure Support

- Java triggers Supported

- Multi-column indexing and outer joins.

- Easy to use graphical user interface

- Supports both object and relational database models

- Simultaneous viewing of classes and relational tables

When two independent processes contend for the same resource or the resources reserved by one another, it is called a deadlock. -911 and -913 are the SQLcode for a deadlock.

A function prototype is a declaration of a function that omits the function body. It specifies the function’s name, argument types and return type.

E.g. int add(int,int)

Variables that are defined in a C# program belong to two major categories: value type and reference type. The variables that are based on value type contain a value that is either allocated on a stack or allocated in-line in a structure. The variables that are based on reference types store the memory address of a variable, which in turn stores the value and are allocated on the heap. The variables that are based on value types have their own copy of data and therefore operations done on one variable do not affect other variables. The reference-type variables reflect the changes made in the referring variables.