- A
Real-time processing for alerts, batch processing for trend analysis
Correct. Alerts require immediate action (real-time), while trend analysis typically uses accumulated data processed periodically (batch).
- B
Stream processing for alerts, transactional processing for trend analysis
Stream processing is a type of real-time processing, but 'transactional processing' refers to OLTP (e.g., order entry), not historical analysis.
- C
Batch processing for alerts, real-time processing for trend analysis
Why wrong: This reverses the correct pairing. Alerts need low latency (real-time), not batch.
- D
OLAP for alerts, OLTP for trend analysis
Why wrong: OLAP (online analytical processing) is for querying and reporting, not necessarily real-time. OLTP is for transactional systems, not historical analysis.
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 manufacturing company uses IoT sensors to monitor machine temperature. The data is analyzed immediately to trigger alerts if temperature exceeds a threshold. The same data is also stored and later analyzed to identify long-term trends. Which two terms best describe these data processing approaches?
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.
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
Real-time processing for alerts, batch processing for trend analysis
Option A is correct because the scenario describes two distinct processing requirements: immediate alerting on temperature thresholds requires real-time (or stream) processing to minimize latency, while long-term trend analysis can be performed on stored data using batch processing, which is efficient for large historical datasets. Real-time processing handles data as it arrives with low latency, and batch processes data in bulk at scheduled intervals.
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.
- ✓
Real-time processing for alerts, batch processing for trend analysis
Why this is correct
Correct. Alerts require immediate action (real-time), while trend analysis typically uses accumulated data processed periodically (batch).
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.
- ✓
Stream processing for alerts, transactional processing for trend analysis
Why this is correct
Stream processing is a type of real-time processing, but 'transactional processing' refers to OLTP (e.g., order entry), not historical analysis.
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.
- ✗
Batch processing for alerts, real-time processing for trend analysis
Why it's wrong here
This reverses the correct pairing. Alerts need low latency (real-time), not batch.
- ✗
OLAP for alerts, OLTP for trend analysis
Why it's wrong here
OLAP (online analytical processing) is for querying and reporting, not necessarily real-time. OLTP is for transactional systems, not historical analysis.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'real-time' with 'batch' based on the word 'immediately' but fail to recognize that trend analysis is inherently a batch workload, leading them to reverse the pairings in options C or D.
Detailed technical explanation
How to think about this question
In practice, real-time processing often uses stream processing engines like Apache Kafka or Azure Stream Analytics, which process events with sub-second latency using sliding windows. Batch processing for trend analysis typically runs on distributed systems like Apache Spark or Azure Synapse, reading from a data lake (e.g., Parquet files) and performing aggregations over months of data. A subtle behavior is that the same IoT data can be dual-written: one path to a stream processor for alerts, and another to a storage layer for batch jobs, ensuring both requirements are met without interference.
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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Describe core data concepts — study guide chapter
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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: Real-time processing for alerts, batch processing for trend analysis — Option A is correct because the scenario describes two distinct processing requirements: immediate alerting on temperature thresholds requires real-time (or stream) processing to minimize latency, while long-term trend analysis can be performed on stored data using batch processing, which is efficient for large historical datasets. Real-time processing handles data as it arrives with low latency, and batch processes data in bulk at scheduled intervals.
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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Last reviewed: Jun 11, 2026
This DP-900 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-900 exam.
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