LLD - Design — Library Management System
In designing tests for a library management system's CRUD operations, which approach best ensures data integrity when multiple users update book records simultaneously?
In designing tests for a library management system's CRUD operations, which approach best ensures data integrity when multiple users update book records simultaneously?
hard📝 Trade-off Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand concurrency issues in CRUD
When multiple users update data simultaneously, conflicts can cause data loss or corruption.Step 2: Identify solution for safe concurrent updates
Optimistic locking detects conflicts by checking if data changed before saving, preventing overwrites.Final Answer:
Implement optimistic locking to detect conflicting updates -> Option DQuick Check:
Optimistic locking = safe concurrent updates [OK]
Quick Trick: Use locking to avoid update conflicts [OK]
Common Mistakes:
MISTAKES- Ignoring concurrency control
- Disabling updates reduces usability
- Using read-only mode prevents changes
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