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Which feature of messaging services helps improve application reliability?

easy📝 Conceptual Q2 of 15
AWS - SNS and SQS
Which feature of messaging services helps improve application reliability?
AGuaranteed message delivery even if receivers are offline
BSynchronous processing of messages
CDirect database access for all components
DReal-time user interface updates
Step-by-Step Solution
Solution:

  1. Step 1: Identify reliability feature

    Messaging services ensure messages are delivered even if the receiver is temporarily unavailable.

  2. Step 2: Match with options

    Guaranteed message delivery even if receivers are offline correctly describes guaranteed delivery, which improves reliability.

  3. Final Answer:

    Guaranteed message delivery even if receivers are offline -> Option A

  4. Quick Check:

    Reliability = guaranteed delivery [OK]
Quick Trick: Reliable messaging means no lost messages [OK]
Common Mistakes:
  • Confusing synchronous with asynchronous
  • Thinking messaging services update UI directly
  • Assuming direct database access improves messaging reliability

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