AZ-204 Develop for Azure storage Practice Question
This AZ-204 practice question tests your understanding of develop for azure storage. 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 designing a solution that stores customer order data in Azure Table Storage. The data includes OrderID (string), CustomerID (string), OrderDate (datetime), and TotalAmount (decimal). You need to query orders for a specific customer within a date range efficiently. Which partition key and row key design should you use?
Option B is correct because Azure Table Storage queries are most efficient when they use PartitionKey for exact matches and RowKey for range scans. By setting PartitionKey = CustomerID, all orders for a specific customer are stored in the same partition, allowing fast retrieval. Using RowKey = OrderDate (inverted ticks for descending order) enables efficient date-range filtering within that partition, as Azure Table Storage supports range queries on RowKey.
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.
✗
PartitionKey = OrderDate, RowKey = OrderID
Why it's wrong here
Does not group by customer; requires scanning all partitions for a customer.
Groups orders by customer and supports efficient range queries on OrderDate.
Related concept
Read the scenario before looking for a memorised answer.
✗
PartitionKey = OrderDate, RowKey = CustomerID
Why it's wrong here
OrderDate as PartitionKey mixes customers in the same partition, causing inefficient scans.
✗
PartitionKey = OrderID, RowKey = CustomerID
Why it's wrong here
OrderID as PartitionKey scatters data, requiring cross-partition queries for a customer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose PartitionKey = OrderDate thinking it enables date-range queries, but they overlook that Azure Table Storage requires PartitionKey to be an exact match for efficient queries, and date-range filtering must be done on RowKey within a single partition.
Detailed technical explanation
How to think about this question
Azure Table Storage uses a hash of the PartitionKey to distribute data across partitions; thus, queries with a specific PartitionKey value are point queries that hit a single partition server. The RowKey is sorted lexicographically within a partition, so using inverted ticks (e.g., '9999-12-31T23:59:59Z' minus ticks) for OrderDate ensures the most recent orders appear first in a range scan. This design leverages the table service's native indexing, avoiding expensive cross-partition queries.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-204 question in full detail.
Develop for Azure storage — This question tests Develop for Azure storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: PartitionKey = CustomerID, RowKey = OrderDate (inverted ticks for descending order) — Option B is correct because Azure Table Storage queries are most efficient when they use PartitionKey for exact matches and RowKey for range scans. By setting PartitionKey = CustomerID, all orders for a specific customer are stored in the same partition, allowing fast retrieval. Using RowKey = OrderDate (inverted ticks for descending order) enables efficient date-range filtering within that partition, as Azure Table Storage supports range queries on RowKey.
What should I do if I get this AZ-204 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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