DEA-C01 Data Operations and Support Practice Question

Correct answer & explanation

Implementing retry logic with exponential backoff allows the Lambda function to handle transient 'ProvisionedThroughputExceededException' errors by retrying write operations with increasing delays, which reduces the load on DynamoDB and gives the table capacity to recover. Since the function is idempotent, retries are safe. Option A is incorrect: decreasing the batch size reduces the number of records per invocation but does not directly address DynamoDB throttling; it may even increase the number of concurrent invocations, potentially worsening the issue. Option B is incorrect: increasing reserved concurrency allows more Lambda functions to run concurrently, which would increase the write rate to DynamoDB, exacerbating throttling. Option D is incorrect: increasing Kinesis shards increases the stream's ingestion capacity but does not affect DynamoDB's throughput limits; the bottleneck is at the DynamoDB table, not the stream.