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: Cengage Learning
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Chapter 10, Problem 4P
Program Plan Intro
Lock:
Lock is the process that ensures the unique use of data item for particular transaction. If the data item is locked by one transaction, the other transactions cannot use the data item until the first transaction unlocks the data item.
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Explain the benefits of marking transaction boundaries, declaring lock characteristics, and letting a DBMS place locks.
How can the key and foreign key constraints be enforced by the DBMS?
Explain the various types of key in DBMS with certain example,
Chapter 10 Solutions
Database Systems: Design, Implementation, & Management
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- In a rollforward, the DBMS uses the log to undo any changes made to the database during a certain period. (515)arrow_forwardOne way to secure a database is to allow only administrators to have access to create and delete tables. (513)arrow_forwardExplain the concept of deadlock detection and resolution in a Distributed DBMS. How do distributed deadlock handling algorithms work?arrow_forward
- Explain the difference between an exclusive lock and a shared lock.arrow_forwardTrue or False: Mandatory security mechanisms of a DBMS can be set by the engineer implementing the database and include constraints to ensure data integrity such as: strict data types enforcing or requiring fields to be entered using lists to restrict data entry. Group of answer choicesarrow_forwardIs there a procedure for DBMS, and how does normalisation work?arrow_forward
- Name five categories that usually find on a DBMS evaluation and selection checklist.arrow_forwardMention the many granularity levels for locks in a database.arrow_forwardWhat happens if you do not declare transaction isolation level and cursor type to a DBMS? Is not declaring the isolation level and cursor type good or bad?arrow_forward
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