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Why is the Isolation property important in preventing dirty reads during concurrent transactions?

hard📝 Conceptual Q10 of 15
SQL - Transactions and Data Integrity
Why is the Isolation property important in preventing dirty reads during concurrent transactions?
AIt ensures transactions are durable after commit
BIt guarantees all-or-nothing execution of transactions
CIt prevents transactions from seeing uncommitted changes
DIt maintains database consistency rules
Step-by-Step Solution
Solution:

  1. Step 1: Define dirty reads

    Dirty reads happen when a transaction reads uncommitted changes from another.

  2. Step 2: Role of Isolation

    Isolation prevents this by hiding uncommitted data from other transactions.

  3. Final Answer:

    It prevents transactions from seeing uncommitted changes -> Option C

  4. Quick Check:

    Isolation prevents dirty reads = C [OK]
Quick Trick: Isolation blocks uncommitted data visibility [OK]
Common Mistakes:
  • Confusing isolation with durability
  • Thinking atomicity prevents dirty reads

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