1. Materialization of the result of a relational algebra operation during query processing increases the number of data transfers between database buffers and the secondary storage. Select one: True False 2. An XML schema that is used to describe a certain XML structure must be a well-formed XML document. Select one: True False 3. When buffer management is implemented based on no-steal policy, the buffer manager can write a buffer modified by a transaction to secondary storage only after the transaction commits. Select one: True False 4. There are no conflicting operations in a view serializable schedule. Select one: True False 5. In Object Exchange model, every object is a child object. Select one: True False

1. Materialization of the result of a relational algebra operation during query processing increases the number of data transfers between database buffers and the secondary storage. Select one: True False 2. An XML schema that is used to describe a certain XML structure must be a well-formed XML document. Select one: True False 3. When buffer management is implemented based on no-steal policy, the buffer manager can write a buffer modified by a transaction to secondary storage only after the transaction commits. Select one: True False 4. There are no conflicting operations in a view serializable schedule. Select one: True False 5. In Object Exchange model, every object is a child object. Select one: True False

Fundamentals of Information Systems

8th Edition

ISBN:9781305082168

Author:Ralph Stair, George Reynolds

Publisher:Ralph Stair, George Reynolds

Chapter3: Database Systems And Applications

Section: Chapter Questions

Problem 1.1CS

See similar textbooks

Similar questions

Given the scenario and requirements in Problem 2, answer the following questions:a. What recommendations will you make regarding the type and characteristics of the required database system?b. What type of data fragmentation is needed for each table?c. What criteria must be used to partition each database?d. Design the database fragments. Show an example with node names, location, fragment names, attribute names, and demonstration data.e. What type of distributed database operations must be supported at each remote site?f. What type of distributed database operations must be supported at the headquarters site?
Hi Can you please answer the last three parts since the first 3 were answered in the previous request? Given the scenario and requirements in Problem 2, answer the following questions:a. What recommendations will you make regarding the type and characteristics of the required database system?b. What type of data fragmentation is needed for each table?c. What criteria must be used to partition each database?d. Design the database fragments. Show an example with node names, location, fragment names, attribute names, and demonstration data.e. What type of distributed database operations must be supported at each remote site?f. What type of distributed database operations must be supported at the headquarters site?
When should distributed database systems replicate data to address data fragmentation? Replication and fragmentation appear incompatible. What distinguishes horizontal and vertical fragmentation? Please illustrate your argument.
List two advantages and two disadvantages of each of the following strategies for storing a relational database: a. Store each relation in one file. b. Store multiple relations (perhaps even the entire database) in one file
List two advantages and two disadvantages of each of the following strategiesfor storing a relational database: Store each relation in one file.
List two advantages and two disadvantages of each of the following strategiesfor storing a relational database: Store multiple relations (perhaps even the entire database) in one file.
What is the shadow paging principle? Assume that a database contains 7 pages and during the execution of a transaction page 5 and 1 are changed. Give the structures of the current directory and shadow directory before and after the transaction execution, respectively. (plese anwer in detail)
When should distributed database systems make advantage of data replication against data fragmentation? Are replication and fragmentation mutually exclusive processes? What's the difference between fragmentation that happens horizontally and fragmentation that happens vertically? Could you kindly clarify your stance via the use of an example?
When attempting to handle data fragmentation in distributed database systems, when is it appropriate to utilise data replication? It would seem that the processes of replication and fragmentation cannot coexist in any meaningful way. What is the function of horizontal fragmentation in contrast to the role that is played by vertical fragmentation? You will need to present an example for me to buy into your line of reasoning if you want me to do so.
List two advantages and two disadvantages of each of the following approaches to the storage of a relational database, as well as the impact that all of these approaches have when combined on the database. Each connection need to be recorded in its own individual document.
Think of an airline's database management system that takes advantage of snapshot isolation. In order to improve overall performance, the airline is willing to accept non-serializable execution. Could you provide me an example of such an execution?
List 2 advantages and two disadvantages of each of the following strategies for storing a relational database: Store each relation in one file and Store multiple relations (perhaps even the entire databases) in one file.