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- Question
Resource locking is a process to prevent multiple applications from obtaining copies of the same record when the record is about to be changed.
Options- A. True
- B. False
- Correct Answer
- True
- 1. The goal of database security is to ensure that only authorized users can perform authorized activities at authorized times.
Options- A. True
- B. False Discuss
- 2. The size of a lock is referred to as lock sizing.
Options- A. True
- B. False Discuss
- 3. Locks placed by command are implicit locks.
Options- A. True
- B. False Discuss
- 4. Database administration refers to a function that applies to the entire organization.
Options- A. True
- B. False Discuss
- 5. An exclusive lock locks the item from change but not from read.
Options- A. True
- B. False Discuss
- 6. In optimistic locking, the assumption is made that conflict will occur.
Options- A. True
- B. False Discuss
- 7. When one transaction reads a changed record that has not been committed to the database a filthy read occurs.
Options- A. True
- B. False Discuss
- 8. The transaction log contains a copy of every database record (or page) after it has changed. These records are called before images.
Options- A. True
- B. False Discuss
- 9. The lost update problem is when User A reads data that have been processed by a portion of a transaction from User B.
Options- A. True
- B. False Discuss
- 10. Locks placed by the DBMS are explicit locks.
Options- A. True
- B. False Discuss
Managing Multiuser Databases problems
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