Quick Answer
The answer is ROUND_ROBIN distribution for mixed workloads in a dedicated SQL pool. This is correct because ROUND_ROBIN distributes data evenly across all distributions without relying on a hash key, making it ideal for tables used in both point-of-sale lookups and large aggregation queries—since no single distribution key can optimize both patterns simultaneously. It avoids data skew and enables parallel processing for aggregations, while efficient lookups are still possible when combined with appropriate indexes like a clustered columnstore index. On the Microsoft Azure Data Engineer Associate DP-203 exam, this scenario tests your understanding of how distribution strategies affect query performance under mixed workloads; a common trap is choosing HASH distribution for lookups alone, which can cause skew or poor aggregation performance. Remember the memory tip: “Round Robin for mixed, no key to fix—balanced for both, no skew tricks.”
This DP-203 practice question tests your understanding of develop data processing. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
You are building a data processing solution in Azure Synapse Analytics. The solution requires creating a table that stores sales transactions. The table will be used for both point-of-sale lookups and large aggregation queries. The data is not updated frequently. Which table distribution should you recommend?
ROUND_ROBIN
ROUND_ROBIN evenly distributes data and works well for mixed workloads.
HASH on TransactionID
Why wrong: TransactionID may be unique but could cause skew if not evenly distributed.
HASH on SalesDate
Why wrong: SalesDate may cause hot spots if many transactions occur on the same date.
REPLICATE
Why wrong: REPLICATE is for small tables, not large fact tables.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
ROUND_ROBIN
ROUND_ROBIN is the correct choice because the table is used for both point-of-sale lookups (single-row queries) and large aggregation queries, and the data is not updated frequently. ROUND_ROBIN distributes data evenly across all distributions without a hash key, which provides the best overall performance for mixed workloads where no single distribution key optimizes both lookup and aggregation patterns. It avoids data skew and allows parallel processing for aggregations while still supporting efficient lookups when combined with appropriate indexes.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
ROUND_ROBIN
Why this is correct
ROUND_ROBIN evenly distributes data and works well for mixed workloads.
Related concept
Read the scenario before looking for a memorised answer.
HASH on TransactionID
Why it's wrong here
TransactionID may be unique but could cause skew if not evenly distributed.
HASH on SalesDate
Why it's wrong here
SalesDate may cause hot spots if many transactions occur on the same date.
REPLICATE
Why it's wrong here
REPLICATE is for small tables, not large fact tables.
Common exam traps
The trap here is that candidates often choose HASH distribution thinking it always improves query performance, but they overlook that without a clear join or grouping column that matches the hash key, HASH can cause data skew and actually degrade mixed workload performance compared to ROUND_ROBIN.
Detailed technical explanation
In Azure Synapse dedicated SQL pools, ROUND_ROBIN is the default distribution when no distribution key is specified, and it ensures that data is spread evenly across all 60 distributions using a round-robin algorithm. For point-of-sale lookups, you can complement ROUND_ROBIN with a clustered index (e.g., on TransactionID) to enable fast single-row retrieval, while large aggregations benefit from full parallel scans across all distributions. A real-world scenario is a retail system where sales data is ingested in real-time and queried both for individual receipts and daily revenue reports—ROUND_ROBIN avoids the performance pitfalls of skewed hash distributions.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Develop data processing — study guide chapter
Learn the concepts, then practise the questions
Develop data processing practice questions
Targeted practice on this topic area only
All DP-203 questions
846 questions across all exam domains
Microsoft Azure Data Engineer Associate DP-203 study guide
Full concept coverage aligned to exam objectives
DP-203 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise DP-203 questions linked to Secure, monitor, and optimize data storage and data processing.
Practise DP-203 questions linked to Design and develop data processing.
Practise DP-203 questions linked to Design and implement data security.
Practise DP-203 questions linked to Monitor and optimize data storage and processing.
Practise DP-203 questions linked to Design and implement data storage.
Practise DP-203 questions linked to Develop data processing.
Practise DP-203 questions linked to DP-203 fundamentals.
Practise DP-203 questions linked to DP-203 scenario.
Practise DP-203 questions linked to DP-203 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Develop data processing — This question tests Develop data processing — Read the scenario before looking for a memorised answer..
The correct answer is: ROUND_ROBIN — ROUND_ROBIN is the correct choice because the table is used for both point-of-sale lookups (single-row queries) and large aggregation queries, and the data is not updated frequently. ROUND_ROBIN distributes data evenly across all distributions without a hash key, which provides the best overall performance for mixed workloads where no single distribution key optimizes both lookup and aggregation patterns. It avoids data skew and allows parallel processing for aggregations while still supporting efficient lookups when combined with appropriate indexes.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 24, 2026
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.