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Design and develop data processing →hardMultiple ChoiceObjective-mapped

DP-203 Design and develop data processing Practice Question

This DP-203 practice question tests your understanding of design and develop data processing. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

Exhibit

Azure Stream Analytics job diagnostics log:

{
  "time": "2023-08-01T12:00:00Z",
  "properties": {
    "jobId": "job-123",
    "jobName": "IoTStreamJob",
    "events": [
      {
        "time": "2023-08-01T11:59:00Z",
        "type": "WatermarkDelay",
        "properties": {
          "watermarkDelaySeconds": 120,
          "maxWatermarkDelaySeconds": 300
        }
      },
      {
        "time": "2023-08-01T11:59:30Z",
        "type": "InputDeserializationError",
        "properties": {
          "source": "iothub",
          "count": 15
        }
      }
    ],
    "jobOutputWatermark": "2023-08-01T11:57:00Z"
  }
}

Refer to the exhibit. A Stream Analytics job shows increasing watermark delay and input deserialization errors. Which action should be taken first to troubleshoot?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

  • Clue: "first"

    Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

Question 1hardmultiple choice
Full question →

Exhibit

Azure Stream Analytics job diagnostics log:

{
  "time": "2023-08-01T12:00:00Z",
  "properties": {
    "jobId": "job-123",
    "jobName": "IoTStreamJob",
    "events": [
      {
        "time": "2023-08-01T11:59:00Z",
        "type": "WatermarkDelay",
        "properties": {
          "watermarkDelaySeconds": 120,
          "maxWatermarkDelaySeconds": 300
        }
      },
      {
        "time": "2023-08-01T11:59:30Z",
        "type": "InputDeserializationError",
        "properties": {
          "source": "iothub",
          "count": 15
        }
      }
    ],
    "jobOutputWatermark": "2023-08-01T11:57:00Z"
  }
}

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

✓

Check the input data schema and ensure it matches the query

The input deserialization errors indicate that some incoming data cannot be parsed correctly. This can cause backpressure and increase watermark delay. Checking the event schema or data format is the first step. The watermark delay of 120 seconds (max 300) is high but the root cause is likely the deserialization errors.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✓

    Check the input data schema and ensure it matches the query

    Why this is correct

    Deserialization errors are often due to schema mismatch; fixing the data or query resolves the root cause.

    Clue confirmation

    The clue word "first" in the question point toward this answer.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    Change the output to a different sink

    Why it's wrong here

    Output sink is unrelated to input deserialization errors.

  • ✗

    Increase the number of Streaming Units (SUs)

    Why it's wrong here

    Scaling may help throughput but does not fix deserialization issues.

  • ✗

    Set the watermark delay threshold higher

    Why it's wrong here

    That only masks the symptom; the underlying issue remains.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.

Trap categories for this question

  • Command / output trap

    Output sink is unrelated to input deserialization errors.

Detailed technical explanation

How to think about this question

This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.

KKey Concepts to Remember

  • Read the scenario before looking for a memorised answer.
  • Find the constraint that changes the correct option.
  • Eliminate answers that are true in general but not in this case.
  • Use explanations to understand the rule behind the answer.

TExam Day Tips

  • Underline the problem statement mentally.
  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.

What to study next

Got this wrong? Here's your next step.

Identify which DP-203 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

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FAQ

Questions learners often ask

What does this DP-203 question test?

Design and develop data processing — This question tests Design and develop data processing — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Check the input data schema and ensure it matches the query — The input deserialization errors indicate that some incoming data cannot be parsed correctly. This can cause backpressure and increase watermark delay. Checking the event schema or data format is the first step. The watermark delay of 120 seconds (max 300) is high but the root cause is likely the deserialization errors.

What should I do if I get this DP-203 question wrong?

Identify which DP-203 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

Are there clue words in this question I should notice?

Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

About these practice questions

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Last reviewed: Jun 25, 2026

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This DP-203 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DP-203 exam.