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Increased parallelism: Since the replicated date has several copies a query can be distributed or can be answered from the smallest loaded site. Also, with more replicas you have greater chances that the required data is found on the site where the transaction is implementing. Hence, data replication can minimise movement of data among sites.
What is object containment? References among objects can be used to model dissimilar real-world concepts.
Physical Database Design Issues The database design includes the process of logical design with the use of E-R diagram, normalisation, etc., followed by the physical design.
Explain controlled redundancy? Controlled redundancy : The replication of data within the data warehouse for the purposes of improved data access or understand ability.
Define According to the levels of abstraction, the schema at the intermediate level is called Ans: As per to the levels of abstraction, the schema at the intermediate level is
You are required to write a report which evaluates two of the following issues in relation to your case study database: a. Security issues b. Performance issues c. Backup
data models are being replaced over years. Reasons and why does that happen?
What is meant by mean time to failure? The mean time to failure is the amount of time that the system could run continuously without failure.
State The position of object at any moment is called state. An object can have many states depend upon time. After receiving some input instructions, the object can change its
Question 1 Explain ER model Question 2 What are the characteristics of a computer provided information? Question 3 What are facts and guidelines to be considered when se
What is conceptual model ? A conceptual model is a independent of both hardware and software.
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