Concurrency Control Techniques
Concurrency Control Techniques • When several transactions execute simultaneously in a database is called concurrent execution of the transaction. • When many transactions execute concurrently in the database, however the isolation property may be failed, therefore the system must control the interaction among the current transactions. This control achieved by a mechanism called concurrency control mechanism. * LOCKING TECHNIQUES * The Two-Phase Locking Protocol *VALIDATION (OPTIMISTIC)-BASED PROTOCOL
yash sharma
Array--finding the location
finding the location (address) of particular element in 2D array
NATIVE XML DATABASES
NATIVE XML DATABASES What are "Native XML Databases" ? Native XML databases are databases that store XML documents and data in a very efficient way. As classic (relational) databases, they allow that data is stored, queried, combined, secured, indexed, etc.. *XML Database *Types of XML databases *XML-enable Database
Object-OrientedDatabases
Object-OrientedDatabases NewDatabaseApplications • TheObject-OrientedDataModel • Object-OrientedLanguages • PersistentProgrammingLanguages • PersistentC++Systems *NewDatabaseApplications *Object-OrientedDataModel *MessagesandMethods
DBMS-distributed databases
distributed databases What are distributed databases? Distributed database is a system in which storage devices are not connected to a common processing unit. Database is controlled by Distributed Database Management System and data may be stored at the same location or spread over the interconnected network. It is a loosely coupled system. Shared nothing architecture is used in distributed databases. Goals of Distributed Database system. What is fragmentation?
Software Engineering-Requirement Specification and Analysis
Requirement Specification and Analysis Introduction to Requirement Specification Functional Requirements Non-Functional Requirements “Functional requirements specify what the product must do for its existence.” Functional requirements include: Specifications of the product’s functionality. Actions the product must take. Derived from the basic purpose of the product. Normally business-oriented, rather than technical. and Data Dictionary and much more
Software Engineering-Prototyping in the Software Process
Requirements Engineering Software Prototyping Prototyping in the Software Process The software prototyping has a series of four steps to be followed: Identifying the initial requirements Develop initial prototype Review Revise Functional Model Behavioural Model etc
BCA-Computer Graphics-Ray-tracing
Here we learn about some of the concepts of Computer Graphics: Ray-tracing Ray-Tracing Examples Ray-Tracing Setup Basic Ray-Tracing Terminating Ray-Tracing Ray-Tracing & Illumination Models The path from the intersection to the light source is known as the shadow ray If any object intersects the shadow ray between the surface and the light source then the surface is in shadow with respect to that source
Software Engineering-Systems Engineering
Here we learn about some important concepts of Software engineering: Systems Engineering Computer-based system Process Improvement and more
Computer Graphics-Viewing Pipeline
Here we learn about some of the concepts of Computer Graphics: Viewing Pipeline Model coordinates to World coordinates: Modelling transformations World coordinates to Viewing coordinates: Viewing transformations Clipping Window vs. Viewport The clipping window and more..
BCA-Computer Graphics-Introduction
Here we learn about some of the concepts of Computer Graphics : Introduction Input Devices Keyboard,mouse,joystick,scanners,digital camera, bar code reader, touch Sreeen,Speech input device (microphone) Output Devices Monitor , Speaker, Printers ( different types) What’s available for input… Often used for applications with occasional use, for example Bank ATMs, Information Kiosks, etc. No extra hardware - used for input and for output Can be precise to 1 pixel Good for menu choice - not so good for other functions Intuitive to use
PHP-Introduction to php
Here we get to know about the basic concepts of PHP like: Introduction to php Background History About Zend PHP 5 Architecture PHP Scripts and many more