- A
Use pg_dump with --no-owner flag; Oracle PL/SQL is compatible with PostgreSQL.
Why wrong: pg_dump is for PostgreSQL, not Oracle. PL/SQL is not compatible with PostgreSQL.
- B
Use mysqldump to export Oracle schema; PL/SQL can be reused as-is.
Why wrong: mysqldump is for MySQL, not Oracle. PL/SQL is not directly compatible with PostgreSQL.
- C
Use Database Migration Service (DMS) with built-in schema conversion; PL/SQL is automatically converted.
Why wrong: DMS does not have built-in schema conversion for Oracle to PostgreSQL; it requires external tools like Ora2Pg.
- D
Use Ora2Pg for schema conversion; PL/SQL must be rewritten to PL/pgSQL.
Ora2Pg converts Oracle objects to PostgreSQL, and PL/SQL must be manually or automatically converted to PL/pgSQL.
Question 274 of 1,000
PCDOE Migrate Database Solutions Practice Question
This PCDOE practice question tests your understanding of migrate database solutions. 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.
An organization needs to migrate a 2 TB Oracle database to Cloud SQL for PostgreSQL. The schema has many stored procedures using PL/SQL. Which tool should they use for schema conversion and what is a key consideration when converting PL/SQL?
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
✓
Use Ora2Pg for schema conversion; PL/SQL must be rewritten to PL/pgSQL.
Option D is correct because Ora2Pg is an open-source tool specifically designed to convert Oracle schemas (including PL/SQL stored procedures, functions, and triggers) to PostgreSQL-compatible PL/pgSQL. Since Oracle's PL/SQL and PostgreSQL's PL/pgSQL have significant syntactic and semantic differences (e.g., exception handling, cursor syntax, package handling), manual rewriting or tool-assisted conversion is required; Ora2Pg automates much of this conversion but still requires manual review and adjustment for complex logic.
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.
- ✗
Use pg_dump with --no-owner flag; Oracle PL/SQL is compatible with PostgreSQL.
Why it's wrong here
pg_dump is for PostgreSQL, not Oracle. PL/SQL is not compatible with PostgreSQL.
- ✗
Use mysqldump to export Oracle schema; PL/SQL can be reused as-is.
Why it's wrong here
mysqldump is for MySQL, not Oracle. PL/SQL is not directly compatible with PostgreSQL.
- ✗
Use Database Migration Service (DMS) with built-in schema conversion; PL/SQL is automatically converted.
Why it's wrong here
DMS does not have built-in schema conversion for Oracle to PostgreSQL; it requires external tools like Ora2Pg.
- ✓
Use Ora2Pg for schema conversion; PL/SQL must be rewritten to PL/pgSQL.
Why this is correct
Ora2Pg converts Oracle objects to PostgreSQL, and PL/SQL must be manually or automatically converted to PL/pgSQL.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that Database Migration Service (DMS) provides full schema conversion for Oracle-to-PostgreSQL migrations, when in fact DMS focuses on data migration and requires separate tools (like Ora2Pg) for schema and stored procedure conversion.
Detailed technical explanation
How to think about this question
Ora2Pg works by connecting to the Oracle database via OCI (Oracle Call Interface) and extracting DDL, data, and PL/SQL code, then transforming it into PostgreSQL-compatible DDL and PL/pgSQL. A key subtlety is that Oracle's packages (which group procedures, functions, and variables) have no direct equivalent in PostgreSQL; Ora2Pg converts each package into a schema with individual functions, often requiring manual refactoring of package state and global variables. In real-world migrations, complex PL/SQL with bulk collect, autonomous transactions, or dynamic SQL may need significant manual rewriting even after Ora2Pg conversion.
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.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this PCDOE question test?
Migrate Database Solutions — This question tests Migrate Database Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Ora2Pg for schema conversion; PL/SQL must be rewritten to PL/pgSQL. — Option D is correct because Ora2Pg is an open-source tool specifically designed to convert Oracle schemas (including PL/SQL stored procedures, functions, and triggers) to PostgreSQL-compatible PL/pgSQL. Since Oracle's PL/SQL and PostgreSQL's PL/pgSQL have significant syntactic and semantic differences (e.g., exception handling, cursor syntax, package handling), manual rewriting or tool-assisted conversion is required; Ora2Pg automates much of this conversion but still requires manual review and adjustment for complex logic.
What should I do if I get this PCDOE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This PCDOE practice question is part of Courseiva's free Google Cloud 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 PCDOE exam.
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