Question 566 of 982

Describe core data concepts →easyMultiple ChoiceObjective-mapped

Quick Answer

The correct answer is that the order processing is an OLTP workload, while the weekly reporting is an OLAP workload. This distinction hinges on the fundamental difference between transaction processing and analytical workloads: OLTP systems are designed for high-volume, low-latency writes that handle individual transactions like inserting an order and updating inventory in real-time, whereas OLAP systems are optimized for complex, read-heavy queries that aggregate large volumes of historical data to identify trends. On the Microsoft Azure Data Fundamentals DP-900 exam, this scenario tests your ability to map real-world business operations to the correct workload type, often appearing in case-study style questions where a single company uses both systems. A common trap is confusing the weekly reporting as a batch transaction; remember that OLTP writes small, immediate changes, while OLAP reads large datasets for analysis. For a quick memory tip, think “OLTP = lots of tiny writes” and “OLAP = big, slow reads.”

DP-900 Describe core data concepts Practice Question

This DP-900 practice question tests your understanding of describe core data concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.

A retail company operates an online store. The store processes each customer's order immediately upon submission, updating inventory and payment records in real-time. Additionally, the company's business analysts run weekly reports that aggregate sales data over the past month to identify trends. Which of the following correctly describes the two workload types represented in this scenario?

Clue words in this question

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

Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.

Question 1easymultiple choice

Full question →

A
The order processing is an OLTP workload; the weekly reporting is an OLAP workload.
Correct. Order processing involves many small, real-time transactions (OLTP). Weekly reporting aggregates large volumes of historical data (OLAP).
B
The order processing is an OLAP workload; the weekly reporting is an OLTP workload.
Why wrong: Incorrect. This swaps the definitions. Order processing is transactional (OLTP), not analytical (OLAP). Weekly reporting is analytical (OLAP), not transactional.
C
Both workloads are OLTP workloads.
Why wrong: Incorrect. While order processing is OLTP, the weekly reporting involves aggregating data for analysis, which is an OLAP workload.
D
Both workloads are batch processing workloads.
Why wrong: Incorrect. Order processing is real-time or near-real-time, not batch. Only the weekly reporting is a batch-oriented workload.

Full breakdown with real-world context →

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

✓

The order processing is an OLTP workload; the weekly reporting is an OLAP workload.

The order processing system handles individual transactions (inserts/updates) in real-time, which is the hallmark of an Online Transaction Processing (OLTP) workload. The weekly reporting aggregates large volumes of historical data for trend analysis, which is an Online Analytical Processing (OLAP) workload. OLTP is optimized for high-volume, low-latency writes, while OLAP is optimized for complex read-heavy queries over large datasets.

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 order processing is an OLTP workload; the weekly reporting is an OLAP workload.
Why this is correct
Correct. Order processing involves many small, real-time transactions (OLTP). Weekly reporting aggregates large volumes of historical data (OLAP).
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The order processing is an OLAP workload; the weekly reporting is an OLTP workload.
Why it's wrong here
Incorrect. This swaps the definitions. Order processing is transactional (OLTP), not analytical (OLAP). Weekly reporting is analytical (OLAP), not transactional.
✗
Both workloads are OLTP workloads.
Why it's wrong here
Incorrect. While order processing is OLTP, the weekly reporting involves aggregating data for analysis, which is an OLAP workload.
✗
Both workloads are batch processing workloads.
Why it's wrong here
Incorrect. Order processing is real-time or near-real-time, not batch. Only the weekly reporting is a batch-oriented workload.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates confuse the real-time nature of order processing with batch processing or mistakenly think that any reporting is OLTP, failing to recognize that OLAP is specifically designed for analytical queries over historical data.

Detailed technical explanation

How to think about this question

Under the hood, OLTP systems use row-oriented storage (e.g., in SQL Server or PostgreSQL) to optimize for point lookups and small writes, often with ACID compliance via transaction logs. OLAP systems, such as Azure Synapse or SQL Server Analysis Services, use columnar storage and pre-aggregated indexes to speed up large scans and GROUP BY operations. In practice, a retail company might use a single database with read replicas or a dedicated data warehouse to separate these workloads and avoid contention.

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.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this DP-900 question test?

Describe core data concepts — This question tests Describe core data concepts — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The order processing is an OLTP workload; the weekly reporting is an OLAP workload. — The order processing system handles individual transactions (inserts/updates) in real-time, which is the hallmark of an Online Transaction Processing (OLTP) workload. The weekly reporting aggregates large volumes of historical data for trend analysis, which is an Online Analytical Processing (OLAP) workload. OLTP is optimized for high-volume, low-latency writes, while OLAP is optimized for complex read-heavy queries over large datasets.

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.

Are there clue words in this question I should notice?

Yes — watch for: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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