AWS - SNS and SQS
Why do standard queues in AWS SQS allow duplicate messages but FIFO queues do not?
Why do standard queues in AWS SQS allow duplicate messages but FIFO queues do not?
hard📝 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Understand design goals of standard queues
Standard queues focus on high throughput and scalability, allowing duplicates and unordered delivery.Step 2: Contrast with FIFO queue behavior
FIFO queues guarantee ordering and exactly-once processing by using deduplication and strict sequencing.Final Answer:
Standard queues prioritize throughput over ordering and deduplication -> Option BQuick Check:
Throughput vs ordering explains duplicates in standard queues [OK]
Quick Trick: Standard queues trade ordering for higher throughput [OK]
Common Mistakes:
MISTAKES- Thinking FIFO queues do not deliver messages
- Assuming standard queues deduplicate automatically
- Believing FIFO queues discard messages after one delivery
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