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PL/SQL is Oracle's procedural extension to SQL, which is the standard database access language. PL/SQL is an advanced fourth-generation programming language (4GL) and offers seamless SQL access, tight integration with the Oracle server and tools, portability, security, and modern software engineering features such as data encapsulation, overloading, exception handling, and information hiding
Posted: 2007-05-07
Category: Computer
There are two basic methods for a computer to render or to store and display an image. When an image is saved in a specific format, it is created in either a raster or vector graphic format.
Posted: 2007-05-03
Category: Computer Certification
A communication between two computers is not possible without a transmission medium. There are different types of media, which have different properties, and the selection of media depends entirely on the needs, size, and environment of the network. The most commonly used transmission medium is copper and fiber optic wires, air, and radio waves. This section deals with different types of cables used to connect the computers in a network.
Posted: 2006-10-06
Category: Networks
Protocol is a set of rules and conventions by which two computers pass messages across a network. Sets of standard protocols facilitate communication between the computers in a network having different types of hardware and software. Both the sender and the receiver computers must use exactly the same set of protocols in order to communicate with each other. A protocol can lay down the rules for the message format, timing, sequencing, and error handling.
Posted: 2006-09-12
Category: Networks
Planning a backup and restoration of files is the most important step to protect data from accidental loss in the event of data deletion or a hard disk failure. The backup copy can be used to restore lost or damaged data. For taking backups and restoring files, Microsoft has provided a utility called Backup.
Posted: 2006-08-31
Category: Data Recovery
A TCP/IP address, generally referred to as an IP address, consists of a thirty-two bit binary number that uniquely identifies a device on a TCP/IP network. It is logically divided into four groups and is presented in dotted binary notations. Each group contains eight bits (one byte) and every node on the TCP/IP network is assigned a unique TCP/IP number (IP address) for the identification of the node. Each IP address is separated internally into two parts: a network ID and a host ID.
Posted: 2006-08-03
Category: Networks
Introduction A research by the U.S. Department of Labor shows that Computer support specialists held about 500,000 jobs in the year 2002, but at present there is still a shortage of skilled individuals to do this job. According to this research this is a fastest growing occupation through 2012. MCDST certification provides an excellent opportunity for those candidates who are interested in the job of support technicians because it validates that the individuals have the skills to support end users and to successfully troubleshoot desktop environments running on the Microsoft Windows XP operating system. For more information you can visit. http://www.bls.gov/oco/ocos268.htm http://www.certmag.com/articles/templates/cmag_department.asp?articleid=917&zoneid=63
Posted: 2006-07-06
Category: Computer Certification
Windows Server 2003 Active Directory is a centralized database that stores the collection of information about all the resources available on the Windows Server 2003 domain. It is a hierarchical representation of all the objects and their attributes available on the network. It enables administrators to manage the network resources, i.e., computers, users, printers, shared folders, etc., in an easy way. The logical structure represented by Active Directory consists of forests, trees, domains, organizational units, and individual objects. This structure is completely independent from the physical structure of the network, and allows administrators to manage domains according to the organizational needs without bothering about the physical network structure.
Posted: 2006-05-18
Category: Networks
