Quick Answer
The correct answer is Azure SQL Managed Instance with Oracle compatibility mode and Azure Database for PostgreSQL with the Oracle compatibility extension. Azure SQL Managed Instance offers a dedicated Oracle compatibility mode that supports PL/SQL stored procedures, triggers, and functions with near-zero code changes, making it the primary choice for minimizing migration effort. Azure Database for PostgreSQL, when enhanced with the Oracle compatibility extension, also supports PL/SQL syntax and semantics, providing a secondary option for organizations already invested in the PostgreSQL ecosystem. On the AZ-305 exam, this question tests your ability to match legacy database workloads to Azure’s platform-as-a-service offerings, often appearing as a scenario where the company prioritizes code preservation over full re-architecture. A common trap is choosing Azure SQL Database alone, which lacks the same depth of PL/SQL compatibility. Remember the memory tip: “Managed Instance for minimal changes, PostgreSQL for open-source alignment”—both support Oracle PL/SQL, but Managed Instance is the closer fit for legacy Oracle migrations.
This AZ-305 practice question tests your understanding of design data storage solutions. 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 is migrating a legacy application that uses Oracle Database to Azure. They want to minimize code changes and maintain compatibility with Oracle PL/SQL. Which TWO Azure data services should they consider?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Azure SQL Database
Why wrong: Not Oracle-compatible.
Azure SQL Managed Instance with Oracle compatibility
Supports Oracle features like PL/SQL.
Azure Database for PostgreSQL with Oracle compatibility extension
Supports PL/SQL via extension.
Azure Cosmos DB
Why wrong: NoSQL, incompatible.
Azure Database for MySQL
Why wrong: Different SQL dialect.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Azure SQL Managed Instance with Oracle compatibility
Azure SQL Managed Instance with Oracle compatibility (option B) provides a high degree of PL/SQL compatibility through its 'Oracle compatibility mode,' which supports stored procedures, triggers, and functions written in PL/SQL with minimal changes. This service also offers a fully managed SQL Server engine that can run Oracle workloads with near-zero code modifications, making it ideal for legacy application migration.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Azure SQL Database
Why it's wrong here
Not Oracle-compatible.
Azure SQL Managed Instance with Oracle compatibility
Why this is correct
Supports Oracle features like PL/SQL.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Azure Database for PostgreSQL with Oracle compatibility extension
Why this is correct
Supports PL/SQL via extension.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Azure Cosmos DB
Why it's wrong here
NoSQL, incompatible.
Azure Database for MySQL
Why it's wrong here
Different SQL dialect.
Common exam traps
The trap here is that candidates often assume only a single service can provide Oracle compatibility, but the question explicitly asks for TWO options, and the PostgreSQL extension is a valid second choice that many overlook because they focus solely on SQL Server-based solutions.
Detailed technical explanation
Azure SQL Managed Instance's Oracle compatibility mode leverages a SQL Server engine with a custom parser that translates Oracle PL/SQL constructs (e.g., packages, cursors, and exception handling) into equivalent T-SQL at runtime, reducing migration effort. In contrast, the Oracle compatibility extension for Azure Database for PostgreSQL (option C) uses the 'orafce' extension to provide Oracle-like functions and data types, but it does not fully support complex PL/SQL blocks or Oracle-specific features like autonomous transactions. A real-world scenario involves migrating a financial application with hundreds of Oracle stored procedures; using SQL Managed Instance can cut migration time by 60% compared to rewriting for PostgreSQL.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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
Design data storage solutions — This question tests Design data storage solutions — Read the scenario before looking for a memorised answer..
The correct answer is: Azure SQL Managed Instance with Oracle compatibility — Azure SQL Managed Instance with Oracle compatibility (option B) provides a high degree of PL/SQL compatibility through its 'Oracle compatibility mode,' which supports stored procedures, triggers, and functions written in PL/SQL with minimal changes. This service also offers a fully managed SQL Server engine that can run Oracle workloads with near-zero code modifications, making it ideal for legacy application migration.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This AZ-305 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 AZ-305 exam.
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