[Solved] Consider two transactions running at the same time: Transaction 1 adds 100 to an account... Which ACID property ensures the final balance is correct as if transactions ran one after another? | SQL

SQL - Transactions and Data Integrity

Consider two transactions running at the same time: Transaction 1 adds 100 to an account balance, Transaction 2 subtracts 50. Which ACID property ensures the final balance is correct as if transactions ran one after another?

AIsolation

BConsistency

CAtomicity

DDurability

Step-by-Step Solution

Solution:

Step 1: Understand concurrent transactions
When two transactions run together, Isolation ensures they don't interfere and produce correct results.
Step 2: Differentiate from other properties
Atomicity is about all-or-nothing, Consistency is about data rules, Durability is about saving changes permanently.
Final Answer:
Isolation -> Option A
Quick Check:
Transactions separated = Isolation [OK]

Quick Trick: No interference means Isolation [OK]

Common Mistakes:

Mixing Consistency with Isolation
Thinking Atomicity handles concurrency
Confusing Durability with Isolation

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More SQL Quizzes

Which ACID property ensures the final balance is correct as if transactions ran one after another?

Step 1: Understand concurrent transactions

Step 2: Differentiate from other properties

Final Answer:

Quick Check:

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