Question 249 of 982

Describe core data concepts →easyMultiple ChoiceObjective-mapped

DP-900 Describe core data concepts Practice Question

This DP-900 practice question tests your understanding of describe core data concepts. 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.

A company operates an online store that processes customer orders. When a customer places an order, the system must immediately reduce the inventory count for the purchased items and record the order details. At the end of each month, the company runs reports that aggregate sales data over the past month to analyze trends. Which type of data processing workload best describes the order placement activity?

Clue words in this question

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

Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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
Transactional processing
Order placement involves immediate, real-time updates to inventory and order records, requiring transactional consistency and ACID properties. This is a classic example of an Online Transaction Processing (OLTP) workload.
B
Analytical processing
Why wrong: Analytical processing (OLAP) is used for aggregating historical data and generating reports, such as the monthly sales report. It is not suitable for the real-time order placement activity.
C
Batch processing
Why wrong: Batch processing handles large volumes of data in scheduled intervals, not in real-time. Order placement requires immediate updates, so batch processing would introduce unacceptable delays.
D
Stream processing
Why wrong: Stream processing handles continuous data streams, such as sensor data or clickstreams, often with near real-time analysis. While order placement could be considered a stream, the primary need here is transactional integrity, not continuous stream analytics.

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

✓

Transactional processing

Order placement requires immediate inventory reduction and order recording, which demands ACID (Atomicity, Consistency, Isolation, Durability) guarantees. This is a classic transactional processing workload, typically handled by OLTP (Online Transaction Processing) systems like SQL Server or Azure SQL Database, ensuring data integrity even under concurrent access.

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.

✓
Transactional processing
Why this is correct
Order placement involves immediate, real-time updates to inventory and order records, requiring transactional consistency and ACID properties. This is a classic example of an Online Transaction Processing (OLTP) workload.
Clue confirmation
The clue words "best", "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Analytical processing
Why it's wrong here
Analytical processing (OLAP) is used for aggregating historical data and generating reports, such as the monthly sales report. It is not suitable for the real-time order placement activity.
✗
Batch processing
Why it's wrong here
Batch processing handles large volumes of data in scheduled intervals, not in real-time. Order placement requires immediate updates, so batch processing would introduce unacceptable delays.
✗
Stream processing
Why it's wrong here
Stream processing handles continuous data streams, such as sensor data or clickstreams, often with near real-time analysis. While order placement could be considered a stream, the primary need here is transactional integrity, not continuous stream analytics.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is confusing the immediate, atomic nature of order placement with batch or stream processing, when the key differentiator is the need for ACID compliance in a single, discrete operation.

Detailed technical explanation

How to think about this question

Under the hood, transactional processing relies on write-ahead logging (WAL) and locking mechanisms (e.g., two-phase locking) to ensure that concurrent orders do not cause overselling. In a distributed scenario, this might involve distributed transactions using the XA standard or compensating transactions (Saga pattern) to maintain consistency across microservices.

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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.

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: Transactional processing — Order placement requires immediate inventory reduction and order recording, which demands ACID (Atomicity, Consistency, Isolation, Durability) guarantees. This is a classic transactional processing workload, typically handled by OLTP (Online Transaction Processing) systems like SQL Server or Azure SQL Database, ensuring data integrity even under concurrent access.

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: "best", "immediately / without restart". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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