DP-203 Develop data processing Practice Question
Exhibit
Refer to the exhibit.
{
"name": "CopyDataPipeline",
"properties": {
"activities": [
{
"name": "CopyFromBlobToSQL",
"type": "Copy",
"inputs": [
{
"referenceName": "BlobDataset",
"type": "DatasetReference"
}
],
"outputs": [
{
"referenceName": "SQLDataset",
"type": "DatasetReference"
}
],
"typeProperties": {
"source": {
"type": "BlobSource",
"recursive": true
},
"sink": {
"type": "SqlSink",
"writeBatchSize": 10000,
"writeBatchTimeout": "00:00:30",
"sqlWriterUseTableLock": true
},
"enableStaging": false
}
}
]
}
}Refer to the exhibit. You are monitoring the CopyDataPipeline in Azure Data Factory. The copy activity is failing with timeout errors. What is the most likely cause?
⚠ Common exam trap
Many exam-takers confuse `writeBatchTimeout` with `writeBatchSize`, assuming a large batch size causes timeouts, but the timeout is a separate property that controls how long the system waits for a batch to complete, not the size of the batch 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
✓
The writeBatchTimeout is set too low (30 seconds), causing timeouts
The copy activity in Azure Data Factory is failing with timeout errors because the `writeBatchTimeout` is set to 30 seconds, which is too low for the volume of data being written to the sink. This property defines the maximum time allowed for a single batch write operation to complete; when it expires, the activity times out. Increasing this value (e.g., to 120 seconds or more) accommodates larger or slower writes, resolving the timeout.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The writeBatchTimeout is set too low (30 seconds), causing timeouts
Why this is correct
30 seconds may be insufficient for large batches.
- ✗
The enableStaging is false, causing network congestion
Why it's wrong here
Staging is optional.
- ✗
The writeBatchSize is too large (10000), exceeding SQL limits
Why it's wrong here
10000 is a reasonable batch size.
- ✗
The recursive property is set to true, causing infinite loops
Why it's wrong here
Recursive just copies files from subfolders.
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