- A
INTEGER
Why wrong: INTEGER cannot store decimal places.
- B
NUMERIC(10,2)
NUMERIC(10,2) matches the precision and scale.
- C
DOUBLE PRECISION
Why wrong: Floating-point type, not exact.
- D
TEXT
Why wrong: Text type would lose numeric semantics.
Question 990 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.
A company is migrating Oracle to Cloud SQL for PostgreSQL using Ora2Pg. For a column defined as NUMBER(10,2) in Oracle, what is the corresponding data type in PostgreSQL?
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
✓
NUMERIC(10,2)
Option B is correct because Oracle's NUMBER(10,2) specifies a fixed-point number with up to 10 digits total and 2 digits after the decimal point. PostgreSQL's NUMERIC(10,2) is the direct equivalent, offering identical precision and scale semantics. Ora2Pg automatically maps NUMBER(p,s) to NUMERIC(p,s) to preserve exact numeric storage.
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.
- ✗
INTEGER
Why it's wrong here
INTEGER cannot store decimal places.
- ✓
NUMERIC(10,2)
Why this is correct
NUMERIC(10,2) matches the precision and scale.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
DOUBLE PRECISION
Why it's wrong here
Floating-point type, not exact.
- ✗
TEXT
Why it's wrong here
Text type would lose numeric semantics.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that NUMBER(p,s) maps to DOUBLE PRECISION or FLOAT, because candidates confuse fixed-point and floating-point semantics, especially when they see 'NUMBER' and assume it's a generic numeric type.
Detailed technical explanation
How to think about this question
Under the hood, PostgreSQL's NUMERIC type stores values as arrays of decimal digits with a separate scale factor, guaranteeing exact arithmetic for financial calculations. In contrast, DOUBLE PRECISION uses IEEE 754 binary representation, which cannot represent many decimal fractions exactly. A real-world scenario: migrating a financial ledger with NUMBER(10,2) columns to DOUBLE PRECISION would cause cumulative rounding errors in balance calculations, making NUMERIC the only safe choice.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
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
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: NUMERIC(10,2) — Option B is correct because Oracle's NUMBER(10,2) specifies a fixed-point number with up to 10 digits total and 2 digits after the decimal point. PostgreSQL's NUMERIC(10,2) is the direct equivalent, offering identical precision and scale semantics. Ora2Pg automatically maps NUMBER(p,s) to NUMERIC(p,s) to preserve exact numeric storage.
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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