Quick Answer
The answer is CALCULATE, SUM, and PREVIOUSQUARTER. This combination works because CALCULATE modifies the filter context to isolate the desired time period, SUM aggregates the SalesAmount column, and PREVIOUSQUARTER is a dedicated time-intelligence function that shifts the date context back one full quarter. On the Microsoft Power BI Data Analyst PL-300 exam, this tests your understanding of time-intelligence patterns and the correct function for comparing a DAX current quarter vs previous quarter calculation. A common trap is choosing DATEADD, which can also shift quarters but is less specific and requires an additional interval parameter; PREVIOUSQUARTER is the direct, exam-preferred choice. Another pitfall is selecting DATESQTD, which calculates quarter-to-date totals rather than the entire previous quarter. For a quick memory tip, remember that PREVIOUSQUARTER is the only function with “previous” in its name, making it the natural pick when you need to compare the current quarter vs previous quarter in a single measure.
This PL-300 practice question tests your understanding of model 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.
You have a Power BI data model with a table named Sales that includes columns: ProductID, SalesAmount, and SalesDate. You need to create a measure that calculates the total sales amount for the current quarter and compares it to the previous quarter. Which THREE DAX functions should you use?
PREVIOUSQUARTER
PREVIOUSQUARTER returns the dates for the previous quarter.
DATEADD
Why wrong: DATEADD could be used but PREVIOUSQUARTER is more direct; the question asks for three, so DATEADD is not the best choice.
DATESQTD
Why wrong: DATESQTD returns dates for the current quarter-to-date, not previous quarter.
CALCULATE
CALCULATE is essential to change filter context for time intelligence.
SUM
SUM aggregates the sales amount.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
PREVIOUSQUARTER
The correct answers are A, B, and D. CALCULATE (A) is used to modify filter context. SUM (B) to aggregate. PREVIOUSQUARTER (D) for time intelligence. Option C (DATEADD) could also work, but PREVIOUSQUARTER is more specific. Option E (DATESQTD) is for quarter-to-date, not previous quarter.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
PREVIOUSQUARTER
Why this is correct
PREVIOUSQUARTER returns the dates for the previous quarter.
Related concept
Read the scenario before looking for a memorised answer.
DATEADD
Why it's wrong here
DATEADD could be used but PREVIOUSQUARTER is more direct; the question asks for three, so DATEADD is not the best choice.
DATESQTD
Why it's wrong here
DATESQTD returns dates for the current quarter-to-date, not previous quarter.
CALCULATE
Why this is correct
CALCULATE is essential to change filter context for time intelligence.
Related concept
Read the scenario before looking for a memorised answer.
SUM
Why this is correct
SUM aggregates the sales amount.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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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FAQ
Model the data — This question tests Model the data — Read the scenario before looking for a memorised answer..
The correct answer is: PREVIOUSQUARTER — The correct answers are A, B, and D. CALCULATE (A) is used to modify filter context. SUM (B) to aggregate. PREVIOUSQUARTER (D) for time intelligence. Option C (DATEADD) could also work, but PREVIOUSQUARTER is more specific. Option E (DATESQTD) is for quarter-to-date, not previous quarter.
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.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 21, 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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