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Question 985 of 1,000

Migrate Database Solutions →mediumMultiple SelectObjective-mapped

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.

A team is planning a migration from Oracle to PostgreSQL on Cloud SQL. They use Ora2Pg to convert the schema. Which THREE Oracle data types require special attention for correct mapping to avoid data loss or precision issues? (Choose 3 correct answers.)

A
DATE
Oracle DATE includes time; maps to TIMESTAMP, not DATE.
B
NUMBER(10,2)
Maps to NUMERIC(10,2); must ensure no truncation.
C
FLOAT
Why wrong: FLOAT maps to double precision; usually fine.
D
CLOB
CLOB maps to TEXT; ensure no size issues.
E
VARCHAR2
Why wrong: VARCHAR2 maps directly to VARCHAR; generally no issues.

Full breakdown with real-world context →

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

✓

DATE

NUMBER(10,2) maps to NUMERIC(10,2) (exact). DATE in Oracle includes time, so it maps to TIMESTAMP. CLOB maps to TEXT. VARCHAR2 maps to VARCHAR. FLOAT maps to double precision, but NUMBER(10) without decimal maps to INTEGER. The tricky ones are DATE (includes time), NUMBER with precision (exact numeric), and CLOB (large text).

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.

✓
DATE
Why this is correct
Oracle DATE includes time; maps to TIMESTAMP, not DATE.
Related concept
Standard ACLs match source addresses.
✓
NUMBER(10,2)
Why this is correct
Maps to NUMERIC(10,2); must ensure no truncation.
Related concept
Standard ACLs match source addresses.
✗
FLOAT
Why it's wrong here
FLOAT maps to double precision; usually fine.
✓
CLOB
Why this is correct
CLOB maps to TEXT; ensure no size issues.
Related concept
Standard ACLs match source addresses.
✗
VARCHAR2
Why it's wrong here
VARCHAR2 maps directly to VARCHAR; generally no issues.

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: DATE — NUMBER(10,2) maps to NUMERIC(10,2) (exact). DATE in Oracle includes time, so it maps to TIMESTAMP. CLOB maps to TEXT. VARCHAR2 maps to VARCHAR. FLOAT maps to double precision, but NUMBER(10) without decimal maps to INTEGER. The tricky ones are DATE (includes time), NUMBER with precision (exact numeric), and CLOB (large text).

What should I do if I get this PCDOE question wrong?

What is the key concept behind this question?

Standard ACLs match source addresses.

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Last reviewed: Jul 4, 2026

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