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Questions and Answers
What is a database transaction?
What is a database transaction?
- A group of unrelated database operations
- A logical unit of work that must be entirely completed or aborted (correct)
- A set of INSERT statements
- A single SELECT statement
What are the four properties of a database transaction?
What are the four properties of a database transaction?
- Consistency, Isolation, Locking, Durability
- Atomicity, Consistency, Isolation, Durability (correct)
- Atomicity, Consistency, Locking, Recovery
- Atomicity, Integrity, Concurrency, Durability
What is the role of concurrency control in maintaining database integrity?
What is the role of concurrency control in maintaining database integrity?
- To ensure that multiple transactions can execute simultaneously without causing inconsistency (correct)
- To limit the number of transactions that can be processed
- To prevent any transactions from executing at the same time
- To allow transactions to execute in any order
How are locking methods used for concurrency control?
How are locking methods used for concurrency control?
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What are the ANSI levels of transaction isolation?
What are the ANSI levels of transaction isolation?
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