- A
Star Schema: A data model structure where fact tables are connected to dimension tables in a star-like pattern.
This is the correct definition of a star schema.
- B
Snowflake Schema: A normalized form of star schema where dimension tables are further split into related tables.
This is the correct definition of a snowflake schema.
- C
Calculated Column: A column added to a table using DAX that is evaluated row by row and stored in memory.
This is the correct definition of a calculated column.
- D
Measure: A DAX formula used for calculations that aggregates data dynamically based on filter context.
This is the correct definition of a measure.
- E
Star Schema: A normalized schema where dimension tables are split into sub-dimensions.
Why wrong: Incorrect — this describes a snowflake schema, not a star schema.
- F
Snowflake Schema: A denormalized schema where fact table connects directly to dimension tables.
Why wrong: Incorrect — this describes a star schema, not a snowflake schema.
PL-300 Prepare the data Practice Question
This PL-300 practice question tests your understanding of prepare the data. 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.
Match each Power BI concept to its definition.
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
Star Schema: A data model structure where fact tables are connected to dimension tables in a star-like pattern.
Star schema uses denormalized dimensions, snowflake schema normalizes dimensions further. Calculated columns are static row-by-row evaluations; measures are dynamic aggregations based on filter context.
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.
- ✓
Star Schema: A data model structure where fact tables are connected to dimension tables in a star-like pattern.
Why this is correct
This is the correct definition of a star schema.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Snowflake Schema: A normalized form of star schema where dimension tables are further split into related tables.
Why this is correct
This is the correct definition of a snowflake schema.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Calculated Column: A column added to a table using DAX that is evaluated row by row and stored in memory.
Why this is correct
This is the correct definition of a calculated column.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Measure: A DAX formula used for calculations that aggregates data dynamically based on filter context.
Why this is correct
This is the correct definition of a measure.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Star Schema: A normalized schema where dimension tables are split into sub-dimensions.
Why it's wrong here
Incorrect — this describes a snowflake schema, not a star schema.
- ✗
Snowflake Schema: A denormalized schema where fact table connects directly to dimension tables.
Why it's wrong here
Incorrect — this describes a star schema, not a snowflake schema.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
What to study next
Got this wrong? Here's your next step.
Identify which PL-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Prepare the data — study guide chapter
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FAQ
Questions learners often ask
What does this PL-300 question test?
Prepare the data — This question tests Prepare the data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Star Schema: A data model structure where fact tables are connected to dimension tables in a star-like pattern. — Star schema uses denormalized dimensions, snowflake schema normalizes dimensions further. Calculated columns are static row-by-row evaluations; measures are dynamic aggregations based on filter context.
What should I do if I get this PL-300 question wrong?
Identify which PL-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This PL-300 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 PL-300 exam.
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