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Why might a DynamoDB query fail even if the syntax is correct?

medium📝 Debug Q7 of 15
AWS - DynamoDB
Why might a DynamoDB query fail even if the syntax is correct?
AThe query requests more data than the provisioned throughput allows
BThe query uses the correct partition key and sort key
CThe table exists and is active
DThe query uses a valid filter expression
Step-by-Step Solution
Solution:
  1. Step 1: Understand throughput limits in DynamoDB

    Queries can fail if they exceed the provisioned read or write capacity, causing throttling errors.
  2. Step 2: Review other options

    Options A, B, and C describe correct conditions that do not cause query failure.
  3. Final Answer:

    The query requests more data than the provisioned throughput allows -> Option A
  4. Quick Check:

    Throughput limits cause failure = D [OK]
Quick Trick: Check capacity limits if queries fail despite correct syntax [OK]
Common Mistakes:
  • Ignoring capacity limits
  • Assuming syntax is the only failure cause
  • Not monitoring throttling errors

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