- A
Use VARCHAR2 and test with pgTAP.
Why wrong: VARCHAR2 is Oracle-specific; PostgreSQL uses VARCHAR. Data type mismatch.
- B
Use NUMERIC(10,2) and pgTAP to write unit tests for stored procedures.
NUMERIC(10,2) is the correct mapping. pgTAP is a testing framework for PostgreSQL, suitable for verifying stored procedures.
- C
Use FLOAT and rely on Ora2Pg's built-in validation.
Why wrong: FLOAT is approximate; NUMBER(10,2) is exact. Ora2Pg does not validate logic, it converts syntax.
- D
Use INTEGER for the data type and PL/pgSQL for testing stored procedures.
Why wrong: INTEGER cannot hold decimal places; NUMBER(10,2) must use NUMERIC. PL/pgSQL is a language, not a testing tool.
Question 830 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 engineer is migrating an Oracle database to Cloud SQL for PostgreSQL. They use Ora2Pg to convert the schema. One source table uses a column with data type NUMBER(10,2). What is the appropriate PostgreSQL data type after conversion, and which tool should the engineer use to verify the correctness of converted stored procedures?
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 NUMERIC(10,2) and pgTAP to write unit tests for stored procedures.
NUMBER(10,2) maps to NUMERIC(10,2) as it is a fixed-point number. Stored procedures converted from PL/SQL to PL/pgSQL should be tested with unit tests, and pgTAP is a popular PostgreSQL testing framework for this purpose. PL/pgSQL is the procedural language, not a testing tool. Ora2Pg handles conversion but does not provide unit tests.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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 VARCHAR2 and test with pgTAP.
Why it's wrong here
VARCHAR2 is Oracle-specific; PostgreSQL uses VARCHAR. Data type mismatch.
- ✓
Use NUMERIC(10,2) and pgTAP to write unit tests for stored procedures.
Why this is correct
NUMERIC(10,2) is the correct mapping. pgTAP is a testing framework for PostgreSQL, suitable for verifying stored procedures.
Related concept
Standard ACLs match source addresses.
- ✗
Use FLOAT and rely on Ora2Pg's built-in validation.
Why it's wrong here
FLOAT is approximate; NUMBER(10,2) is exact. Ora2Pg does not validate logic, it converts syntax.
- ✗
Use INTEGER for the data type and PL/pgSQL for testing stored procedures.
Why it's wrong here
INTEGER cannot hold decimal places; NUMBER(10,2) must use NUMERIC. PL/pgSQL is a language, not a testing tool.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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. ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement. 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.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PCDOE ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this PCDOE question test?
Migrate Database Solutions — This question tests Migrate Database Solutions — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Use NUMERIC(10,2) and pgTAP to write unit tests for stored procedures. — NUMBER(10,2) maps to NUMERIC(10,2) as it is a fixed-point number. Stored procedures converted from PL/SQL to PL/pgSQL should be tested with unit tests, and pgTAP is a popular PostgreSQL testing framework for this purpose. PL/pgSQL is the procedural language, not a testing tool. Ora2Pg handles conversion but does not provide unit tests.
What should I do if I get this PCDOE question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PCDOE ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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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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