Question:
Choose a recovery mechanism from the following:
Choose a recovery mechanism from the following:
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ARIES is the most important recovery algorithm in DBMS and is based on logging, redo and undo operations.
Updated On: Jun 25, 2026
- 2PL
- ARIES
- Blind write
- Validation based protocol
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The Correct Option is B
Solution and Explanation
Concept:
Database recovery techniques are used to restore the database to a consistent state after failures such as system crashes, transaction failures, or media failures.
ARIES stands for:
\[
\text{Algorithms for Recovery and Isolation Exploiting Semantics}
\]
It is one of the most widely used database recovery algorithms.
Step 1: Understand ARIES.
ARIES is a recovery manager based on:
• Write Ahead Logging (WAL)
• Redo operations
• Undo operations It ensures transaction durability and atomicity.
Step 2: Analyze other options.
2PL (Two Phase Locking) is a concurrency control protocol. Validation protocol is used in optimistic concurrency control. Blind write is simply a type of write operation.
Step 3: Choose the correct answer.
Therefore, \[ \boxed{\text{ARIES}} \] is a recovery mechanism.
Step 1: Understand ARIES.
ARIES is a recovery manager based on:
• Write Ahead Logging (WAL)
• Redo operations
• Undo operations It ensures transaction durability and atomicity.
Step 2: Analyze other options.
2PL (Two Phase Locking) is a concurrency control protocol. Validation protocol is used in optimistic concurrency control. Blind write is simply a type of write operation.
Step 3: Choose the correct answer.
Therefore, \[ \boxed{\text{ARIES}} \] is a recovery mechanism.
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