DP-900 Describe an analytics workload on Azure Practice Question
This DP-900 practice question tests your understanding of describe an analytics workload on azure. 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.
Exhibit
Refer to the exhibit.
```kusto
StormEvents
| where EventType == "Tornado"
| summarize TornadoCount = count() by State
| order by TornadoCount desc
| take 5
```
You run the above Kusto query in Azure Data Explorer. What does the query return?
Refer to the exhibit.
```kusto
StormEvents
| where EventType == "Tornado"
| summarize TornadoCount = count() by State
| order by TornadoCount desc
| take 5
```
A
The total number of tornado events across all states.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The top 5 states with the most tornado events.
The Kusto query uses the `summarize` operator to count events per state, then `top 5 by count_` to return the five states with the highest event counts. The `project` operator ensures only the state and count columns are shown, making option B correct.
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.
✗
The total number of tornado events across all states.
Why it's wrong here
It returns per state, not total.
✓
The top 5 states with the most tornado events.
Why this is correct
Correct: count by state, order desc, top 5.
Related concept
Read the scenario before looking for a memorised answer.
✗
The top 5 years with the most tornadoes.
Why it's wrong here
It summarizes by State, not year.
✗
The number of events by type.
Why it's wrong here
It filters for Tornado only.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse the grouping column (State) with other columns like EventType or Year, leading them to select options that describe aggregations by those columns instead of by state.
Detailed technical explanation
How to think about this question
The `summarize` operator in Kusto Query Language (KQL) aggregates data by specified columns, here `State`, and the `count()` function produces a count of rows per group. The `top 5 by count_` operator sorts the aggregated results descending by the count column and returns only the first 5 rows, which is efficient for large datasets as it avoids sorting the entire result set. This pattern is commonly used for leaderboard-style analytics in Azure Data Explorer.
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.
TExam Day Tips
→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-900 question in full detail.
Describe an analytics workload on Azure — This question tests Describe an analytics workload on Azure — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The top 5 states with the most tornado events. — The Kusto query uses the `summarize` operator to count events per state, then `top 5 by count_` to return the five states with the highest event counts. The `project` operator ensures only the state and count columns are shown, making option B correct.
What should I do if I get this DP-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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