DP-800 Fragen & Antworten & DP-800 Studienführer & DP-800 Prüfungsvorbereitung

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Microsoft DP-800 Prüfungsplan:

ThemaEinzelheiten
Thema 1
  • Implement AI capabilities in database solutions: This domain covers designing and managing external AI models and embeddings, implementing full-text, semantic vector, and hybrid search strategies, and building retrieval-augmented generation (RAG) solutions that connect database outputs with language models.
Thema 2
  • Secure, optimize, and deploy database solutions: This domain focuses on implementing data security measures like encryption, masking, and row-level security, optimizing query performance, managing CI
  • CD pipelines using SQL Database Projects, and integrating SQL solutions with Azure services including Data API builder and monitoring tools.
Thema 3
  • Design and develop database solutions: This domain covers designing and building database objects such as tables, views, functions, stored procedures, and triggers, along with writing advanced T-SQL code and leveraging AI-assisted tools like GitHub Copilot and MCP for SQL development.

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Microsoft Developing AI-Enabled Database Solutions DP-800 Prüfungsfragen mit Lösungen (Q74-Q79):

74. Frage
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You have a SQL database in Microsoft Fabric that contains a table named dbo.Orders.
dbo.Orders has a clustered index, contains three years of data, and is partitioned by a column named OrderDate by month.
You need to remove all the rows for the oldest month. The solution must minimize the impact on other queries that access the data in dbo.Orders.
Solution: Identify the partition scheme for the oldest month, and then run the following Transact- SQL statement.
ALTER TABLE dbo.Orders
DROP PARTITION SCHEME (partition_scheme_name);
Does this meet the goal?

Antwort: A

Begründung:
Correct:
* Identify the partition number for the oldest month, and then run the following Transact-SQL statement.
TRUNCATE TABLE dbo.Orders
WITH (PARTITIONS (partition number));
The best Transact-SQL statement to remove all rows for the oldest month while minimizing the impact on other queries is TRUNCATE TABLE with a WITH (PARTITIONS (...)) clause.
Why TRUNCATE TABLE ... WITH (PARTITIONS (...)) is Best
Efficiency: TRUNCATE TABLE is a Data Definition Language (DDL) operation that removes data by deallocating the data pages, which is a metadata operation and is very fast, regardless of the amount of data in the partition.
Minimal Logging: It uses less transaction log space compared to a DELETE statement, which logs each row deletion individually.
Low Impact on Concurrency: It performs a quick, partition-specific operation. A row-by-row DELETE would be a long-running transaction and could cause locking and blocking issues for other queries accessing the table.
Data Integrity: Because the table has a clustered index and is partitioned by the same column (aligned indexes), the TRUNCATE PARTITION operation is a fast, partition-level maintenance operation that targets only that specific data subset.
Incorrect:
* : Identify the partition scheme for the oldest month, and then run the following Transact-SQL statement.
ALTER TABLE dbo.Orders
DROP PARTITION SCHEME (partition_scheme_name);
The DROP PARTITION SCHEME statement removes the partition scheme object from the database but does not remove the data itself or free up the space, and it requires all tables to be moved off the scheme first, which is a complex operation. This does not meet the goal of removing the data efficiently.
* Run the following Transact-SQL statement.
DELETE FROM dbo.Orders
WHERE OrderDate < DATEADD(month, -36, SYSUTCDATETIME());
A standard DELETE statement, even with a WHERE clause that uses the partition column, can be a time-consuming, logged operation that causes locking and blocking on the main table, negatively impacting performance.
Reference:
https://stackoverflow.com/questions/63632963/truncate-partition-vs-drop-partition-performace- wise-which-one-is-efficient-an


75. Frage
Which service enables natural language querying over SQL data?

Antwort: A

Begründung:
Azure OpenAI Service allows users to query structured SQL data using natural language via LLMs.


76. Frage
You have an Azure SQL database.
You deploy Data API builder (DAB) to Azure Container Apps by using the mcr.nicrosoft.com/azure-databases
/data-api-builder:latest image.
You have the following Container Apps secrets:
* MSSQL_COMNECTiON_STRrNG that maps to the SQL connection string
* DAB_C0HFT6_BASE64 that maps to the DAB configuration
You need to initialize the DAB configuration to read the SQL connection string.
Which command should you run?

Antwort: C

Begründung:
Data API builder supports reading the database connection string from an environment variable by using the syntax:
@env( ' MSSQL_CONNECTION_STRING ' )
Microsoft's DAB documentation explicitly shows that @env( ' MSSQL_CONNECTION_STRING ' ) tells Data API builder to read the connection string from an environment variable at runtime.
That fits this scenario because Azure Container Apps secrets are typically exposed to the container as environment variables . Microsoft's Azure Container Apps documentation states that environment variables can reference secrets, and DAB's Azure Container Apps deployment guidance shows a secret being mapped into an environment variable that DAB then reads.
Why the other options are wrong:
* A and D incorrectly point the connection string to DAB_CONFIG_BASE64, which is the config payload secret, not the SQL connection string.
* C uses secretref: syntax inside dab init, but DAB expects the connection string parameter in the config to use the environment-variable reference syntax @env(...). The secretref: pattern is for Azure Container Apps environment variable configuration, not for the DAB CLI connection-string argument itself.
So the correct command is:
dab init --database-type mssql --connection-string " @env( ' MSSQL_CONNECTION_STRING ' ) " --host- mode Production --config dab-config.json


77. Frage
You have a GitHub Actions workflow that builds and deploys an Azure SQL database. The schema is stored in a GitHub repository as an SDK-style SQL database project.
Following a code review, you discover that you need to generate a report that shows whether the production schema has diverged from the model in source control.
Which action should you add to the pipeline?

Antwort: D

Begründung:
Microsoft documents that DriftReport creates an XML report showing changes that have been made to the registered database since it was last registered . That is the action intended to detect whether the production schema has diverged from the expected model baseline in your deployment workflow.
This is different from DeployReport , which shows the changes that would be made by a publish action . In other words:
* DriftReport answers: Has the deployed database drifted from the registered state/model?
* DeployReport answers: What changes would be applied if I published now?
The other options are not the right fit:
* Extract creates a DACPAC from an existing database, not a drift analysis report.
* Script generates a deployment script, not a schema-drift report.
So to generate a report that shows whether production has diverged from the model in source control , add:
SqlPackage.exe /Action:DriftReport


78. Frage
Drag and Drop Question
You have an Azure SQL database that supports an AI-driven product search API.
You need to identify the top CPU-consuming queries from the last two hours by using Query Store data. The solution must aggregate CPU consumption across executions and return only the top 15 query hashes.
How should you complete the Transact-SQL code? To answer, drag the appropriate values to the correct targets. Each value may be used once, more than once, or not at all.
NOTE: Each correct selection is worth one point.

Antwort:

Begründung:


79. Frage
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