DEA-C01 Data Ingestion and Transformation Practice Question
Network Topology
Refer to the exhibit. A data engineer runs the AWS CLI command and observes the output. The stream has two shards. A producer sends a record with a partition key that hashes to 150000000000000000000000000000000000000. To which shard will the record be written?
⚠ Common exam trap
The DEA-C01 exam often tests the misconception that the shard ID (e.g., 000000000000) corresponds to the numeric order of the hash range, but in reality, the shard ID is a sequential identifier and the hash key range is what determines routing, not the shard ID itself.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
shardId-000000000001
The record will be written to shardId-000000000001 because the hash key range for shardId-000000000000 is [0, 170141183460469231731687303715884105727) and for shardId-000000000001 is [170141183460469231731687303715884105727, 340282366920938463463374607431768211455). The partition key hash value of 150000000000000000000000000000000000000 falls within the second shard's range, so the record is routed to shardId-000000000001.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
shardId-000000000001
Why this is correct
The hash key falls within the range of the second shard.
- ✗
The record will be rejected because it does not match any shard
Why it's wrong here
The hash is within the second shard's range; records are not rejected.
- ✗
shardId-000000000000
Why it's wrong here
The hash key is greater than the ending hash key of this shard.
- ✗
The record will be written to both shards
Why it's wrong here
Records are written to exactly one shard based on hash key.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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