Answered: If the state of a database no longer…

If the state of a database no longer reflects a real life state the database is supposed to capture, then such a database state is said to be A Consistent B Durable C Parallel D Inconsistent.

Database Systems: Design, Implementation, & Management

11th Edition

ISBN:9781285196145

Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel

Publisher:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel

Chapter10: Transaction Management And Concurrency Control

Section: Chapter Questions

Problem 1P

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Answer step-wise explaining detailly each step.

If the state of a database no longer reflects a real life
state the database is supposed to capture, then such a
database state is said to be
A Consistent
B Durable
C Parallel
D Inconsistent.

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That's possible even if the master database has a "exclusive lock" on modifications. Data inconsistencies may occur in the database even if a "exclusive lock" is obtained for modifications if information is retrieved from a node other than the master.
Today almost every commercial database is based on O the hierarchical model O the linked-list model O the object-oriented model lists the relational model Given the relations: STUDENT (SID. StudentName, Major, AdvisorID) ADVISOR (AdvisorID, AdvisorName, Office, Phone) such that each student is assigned to one advisor, which of the following is true? O Major is a candidate key. O Phone is a candidate key. AdvisorName is a determinant. O AdvisorID is a foreign key. O SID is both a primary key and a foreign key.
Take, for example, a database that is used by a large airline and in which the underlying database management system utilises snapshot isolation. Even while the airline would prefer a serializable execution, it could be ready to tolerate a non serializable execution if it implies that the process would be completed more quickly in general.
Suppose that you have been tasked with cataloging the information found in books. Either more books need to be added, or the ones now stacked on one side of the shelf need to be rotated. Find the optimal data structure and explain why it works here. Provide a flexible method of stocking the bookcase. What happens, meanwhile, if fresh information must be added to a database but there isn't enough space for it?
When it comes to a bank's database, consider a system that uses snapshot isolation. In certain cases, the bank may encounter difficulties due to an execution that cannot be serialized.
Take, for example, a database that is used by a large airline and in which the underlying database management system utilises snapshot isolation. In spite of the fact that the airline would prefer a serializable execution, it could be ready to tolerate a non serializable execution if it means that the process would be completed more quickly overall.
a database that tracks students and their majors. Students may have multiple majors and students need not have a major declared. A student major must link back to a valid academic program. Reconstruct the ERD for this database and paste it below.
Snapshot isolation, for example, is used in a database system for an airline. The airline may be willing to accept a nonserializable execution if it means greater overall performance.
Even if an exclusive lock was in place on the primary (master) copy of the database, inconsistencies may arise if data were read from a different node.
The execution time of a database falls under what Big O class? Providing there is just one more step, I will finish it. The number of deletions that may be made in a single go. Even if it were used for only one ad, it wouldn't make a difference. immediately as a result of a single internet search?
This is possible regardless of the presence or absence of a "exclusive lock" on changes to the main (master) database. If data is fetched from a node other than the master, errors in the database may emerge even if a "exclusive lock" is secured for the alterations.
Consider a bank's database system that utilises snapshot isolation. Describe a nonserializable execution that would present the bank with a challenge.

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