What are the ACID properties of a database transaction?
This question tests your knowledge of transaction guarantees ensuring reliable processing. It is critical for any role involving financial or critical data operations.
Why Interviewers Ask This
ACID properties define the reliability of database transactions. Interviewers want to confirm you understand how databases maintain consistency during failures. This is fundamental for building trustworthy applications.
How to Answer This Question
List the four properties: Atomicity, Consistency, Isolation, Durability. Define each clearly with a brief example. Explain how databases enforce these rules. Mention isolation levels briefly. Connect to real-world scenarios like banking transfers.
Key Points to Cover
- Atomicity definition
- Consistency constraints
- Isolation levels
- Durability mechanisms
Sample Answer
ACID stands for Atomicity, Consistency, Isolation, and Durability. Atomicity ensures all parts of a transaction succeed or none do. Consistency guarantees the database remains in a valid state before and after. Isolation prevents concurrent transactions from interfering with each other. Durability ensures committed changes persist even after a crash. These properties are vital for systems like payment gateways where data accuracy is non-negotiable.
Common Mistakes to Avoid
- Defining properties incorrectly
- Confusing isolation with atomicity
- No real-world examples
Practice This Question with AI
Answer this question orally or via text and get instant AI-powered feedback on your response quality, structure, and delivery.
Related Interview Questions
What is the difference between LIKE and equals operators in SQL?
Easy
TCSWhat is the difference between UNION and UNION ALL?
Easy
Describe a PRIMARY KEY and how it differs from a UNIQUE key
Medium
What is ER model in the DBMS?
Medium
FlipkartWhat is GUI and how does it differ from CLI?
Easy
FlipkartDefine Bridge in Computer Networks
Easy
Flipkart