Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A smart building monitoring company ingests real-time sensor data (temperature, humidity, occupancy) from thousands of IoT devices into Azure Event Hubs. The company also stores historical building blueprints and maintenance records as CSV files in Azure Data Lake Storage Gen2. The engineering team needs to build a dashboard that displays live sensor readings overlaid on building floor plans, and also allows facility managers to run ad-hoc T-SQL queries that combine live sensor data with historical maintenance records. Which Azure service should they use as the primary analytics platform to meet both requirements?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Azure Stream Analytics
Azure Stream Analytics is designed for real-time stream processing and can output to dashboards, but it does not natively support ad-hoc T-SQL queries on historical batch data combined with live streams.
B
Best answer
Azure Synapse Analytics
Azure Synapse Analytics unifies big data and data warehousing. It can ingest streaming data via Event Hubs, query both streaming and batch data using T-SQL across the data lake, and support dashboarding, making it the best fit for both real-time and ad-hoc requirements.
C
Distractor review
Azure Databricks
Azure Databricks is excellent for data engineering and machine learning with Python, Scala, and SQL. However, it does not provide native T-SQL support and is less suited for users who need a traditional T-SQL query experience.
D
Distractor review
Azure Analysis Services
Azure Analysis Services is a semantic modeling service that requires pre-built models and is not designed for real-time streaming ingestion or ad-hoc T-SQL queries on raw data lake files.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Related practice questions
Related DP-900 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A data engineer needs to process streaming data from IoT devices and store the results in Azure Data Lake Storage for long-term analytics. The data must be processed in near real-time to detect anomalies and trigger alerts. Which Azure service should the engineer use for stream processing?
Question 2
A data engineer needs to query data stored in CSV files in Azure Data Lake Storage Gen2 using T-SQL in Azure Synapse Analytics, without loading the data into the database. Which feature should they use?
Question 3
A data engineer needs to process raw clickstream data from multiple websites that is stored in Azure Blob Storage as JSON files. The processing must run automatically every hour, transform the data into a structured format for reporting, and handle schema changes in the source data without manual intervention. Which Azure service should be used?
Question 4
A data engineer is designing a data lake architecture in Azure. They plan to first ingest raw data from various sources into a landing zone in Azure Data Lake Storage Gen2. Then they will clean, validate, and deduplicate that data in a second zone. Finally, they will create aggregated, business-ready datasets in a third zone for analysts. This layered approach is known as which architecture?
Question 5
A data engineer needs to transform large datasets stored in Azure Data Lake Storage Gen2 using Python and Apache Spark. They want a serverless compute option that automatically scales and requires no cluster management. Which Azure service should they use?
Question 6
A company collects customer feedback forms. Each form contains always-present fields like CustomerID and SubmissionDate, but also a free-text Comments field and optional fields like Rating or ProductCategory that vary between forms. How should this data be classified?
FAQ
Questions learners often ask
What does this DP-900 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Azure Synapse Analytics — Azure Synapse Analytics is the best choice because it can ingest streaming data from Event Hubs via pipelines, supports T-SQL queries across both streaming and batch data in the data lake, and provides integrated dashboards and reporting. Azure Stream Analytics excels at real-time processing but lacks the ability to easily combine with historical relational data for ad-hoc T-SQL queries. Azure Databricks is powerful for data engineering and machine learning but does not natively support T-SQL. Azure Analysis Services is for semantic modeling and not meant for direct streaming or ad-hoc queries on raw data.
What should I do if I get this DP-900 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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