The correct action is to redistribute the fact table on the join column using hash distribution. This works because hash distribution uses a deterministic hash function to assign rows to distributions based on the distribution key; when that key matches the join column, rows that need to be joined are co-located on the same distribution, eliminating the need to shuffle data across nodes. On the DP-203 exam, this scenario tests your understanding of how distribution design directly impacts query performance in dedicated SQL pools, often appearing as a troubleshooting question where you must identify the root cause of excessive data movement. A common trap is confusing round-robin distribution as a fix—it actually scatters data randomly, worsening joins—or assuming that simply updating statistics will reduce physical data movement. Remember the memory tip: “Hash on join, no need to roam; align the key, keep data home.”
DP-203 Practice Question: Secure, monitor, and optimize data storage and data processing
This DP-203 practice question tests your understanding of secure, monitor, and optimize data storage and 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.
Your team is troubleshooting slow query performance on a dedicated SQL pool in Azure Synapse Analytics. The query uses a hash-distributed fact table with 60 distributions. After reviewing the execution plan, you notice a high number of data moves. Which action would most likely reduce data movement?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Redistribute the fact table on the join column using hash distribution.
Option C is correct because aligning the distribution key of the fact table with the join column in a hash-distributed table keeps matching rows on the same distribution, minimizing data movement. Option A is wrong because changing to round-robin can increase data movement for joins. Option B is wrong because increasing distributions requires rebuilding the table and does not guarantee reduced movement. Option D is wrong because statistics help the optimizer but do not directly reduce movement.
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.
✗
Change the distribution type to round-robin.
Why it's wrong here
Round-robin distributes rows evenly but does not align with join keys, often increasing data movement.
✗
Update statistics on all columns used in joins.
Why it's wrong here
Statistics improve query plans but do not directly reduce data movement.
✗
Increase the number of distributions to 120.
Why it's wrong here
More distributions do not inherently reduce movement; alignment matters more.
✓
Redistribute the fact table on the join column using hash distribution.
Why this is correct
Hash distribution on the join column keeps related rows together, reducing data shuffling.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
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.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-203 question in full detail.
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.
Secure, monitor, and optimize data storage and data processing — This question tests Secure, monitor, and optimize data storage and data processing — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Redistribute the fact table on the join column using hash distribution. — Option C is correct because aligning the distribution key of the fact table with the join column in a hash-distributed table keeps matching rows on the same distribution, minimizing data movement. Option A is wrong because changing to round-robin can increase data movement for joins. Option B is wrong because increasing distributions requires rebuilding the table and does not guarantee reduced movement. Option D is wrong because statistics help the optimizer but do not directly reduce movement.
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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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