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Question:
In relation to distributed database answer the following questions:
(i) Give a brief definition of distributed database. Support your answer with an appropriate diagram that shows the major component of the distributed database.
(ii) Differentiate between homogeneous distributed database and heterogeneous database system and explain which one will be appropriate for a company which has been using a database for the past 30 years and who now, wants to implement a distributed database.
(iii) Describe briefly two transparency features that exist in a distributed database environment.
(iv) Differentiate between horizontal partitioning and mixed partitioning with appropriate example.
(v) Briefly describe any three advantages of replication.
What is candidate key? Candidate Key - A candidate key of an entity set is a minimal superkey, which uniquely identifies each row in the relation.
Forward Recovery (Redo): In this system the committed changes made by a transaction are reapplied to a previous copy of the database. In simpler
These are designed to reduce the effects of a database failure and make sure a database is restored to a consistent state if a failure does arise. Manual backup/restore utilities n
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
What is property - properties of a database ? It is an integrated collection of logically related records. It consolidates separate files into a common pool of data records and
explain thee diffrent types of data models
Assume you are given a uniprocessor system with one gigabyte of memory and a 300 gigabyte disk. The OS on the machine has a demand paged virtual memory system with a local page rep
i need help for assignment ..
Define Serializable schedule Serializable schedule: An interleaved schedule of much more than one transaction is known as a serializable schedule, if it is equal to some serial
I want an iPad app that is a simple 1 page form to complete with text. The Objective is to allow a few dozen people of the same organization (they're all on iPad) to open the app,
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