Bird
0
0

Which ACID property guarantees that once a transaction is committed, its changes are permanent even if the system crashes?

easy📝 Conceptual Q1 of 15
SQL - Transactions and Data Integrity
Which ACID property guarantees that once a transaction is committed, its changes are permanent even if the system crashes?
AIsolation
BAtomicity
CConsistency
DDurability
Step-by-Step Solution
Solution:

  1. Step 1: Understand Durability in ACID

    Durability means that once a transaction commits, its changes survive system failures.

  2. Step 2: Compare with other properties

    Atomicity ensures all or nothing, Isolation manages concurrent transactions, Consistency ensures data validity.

  3. Final Answer:

    Durability -> Option D

  4. Quick Check:

    Durability = C [OK]
Quick Trick: Durability means data stays safe after commit [OK]
Common Mistakes:
  • Confusing durability with atomicity
  • Mixing isolation with durability

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More SQL Quizzes
Advanced Query Patterns - Conditional aggregation pattern - Quiz 6medium Common Table Expressions (CTEs) - CTE as readable subquery replacement - Quiz 2easy Common Table Expressions (CTEs) - Multiple CTEs in one query - Quiz 3easy Indexes and Query Performance - When indexes help and when they hurt - Quiz 1easy Indexes and Query Performance - Composite index and column order - Quiz 13medium Indexes and Query Performance - CREATE INDEX syntax - Quiz 1easy Triggers - UPDATE trigger with OLD and NEW - Quiz 11easy Window Functions Fundamentals - NTILE for distribution - Quiz 13medium Window Functions Fundamentals - RANK and DENSE_RANK difference - Quiz 1easy Window Functions Fundamentals - ROW_NUMBER function - Quiz 10hard