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A Data Model in software engineering is an abstract model that organizes and documents the business data for interaction between team members and is used as a plan for creating applications, how data are accessed and stored. According to Hoberman (2009), "A data model is a wayfinding tool for both IT professionals and business, which needs a set of text and symbols to precisely illustrate a subset of real information to enhance communication within the organization and thereby lead to a more stable and flexible application environment." A data model explicitly calculates the structure of structured data or data. Typical applications of data models add database models, enabling exchange of data, and design of information systems. Generally data models are described in a data modeling language.
Define average latency time. The average latency time of the disk is one-half the time for a full rotation of the disk.
What benefits can a company gain by managing its own information infrastructure and servicea
Explain Strict Two-Phase locking A transaction T does not release any type of its exclusive (X) locks until that transaction commits or aborts. In this method no other transact
What is a view? Make a view of EMP table named DEPT 20, to display the employees in department 20 and their annual salary. Ans: View is a virtual table that does not consist
Consider an information system designed for an online company which provides IT products and services These include desktops, laptops, networking products, IT books, parts, and
draw er diagram using entities crop,employee,department,plot,cultivation plan,machinery,seed,fertilizer
What are the two approaches to store relations in distributed database? a) Replication b) Fragmentation
WHAT IS MEANT BY E-R MODEL
A View may be defined of as a virtual table, that is, a table that does not really exist in its own right but is instead inferred from one or more underlying base data table. T
Chapter 10a review questions
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