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Exam PL-300 topic 2 question 48 discussion

Actual exam question from Microsoft's PL-300

Question #: 48
Topic #: 2

You have the Power BI data model shown in the following exhibit.

The Sales table contains records of sales by day from the last five years up until today’s date.

You plan to create a measure to return the total sales of March 2021 when March 2022 is selected.

Which DAX expression should you use?

A. Calculate (Sum(Sales[Sales]), PREVIOUSYEAR( dimDate[Date])
B. TOTALYTD (SUM(Sales[Sales]), dimDate[Date] )
C. Calculate (SUM(Sales[Sales]), SAMEPERIODLASTYEAR(dimDate[Date] ))
D. SUM(Sales[Sales])

Show Suggested Answer

Suggested Answer: C 🗳️

by GuerreiroJunior at Jan. 10, 2023, 7:35 p.m.

Comments

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Jayjay5

Highly Voted 1 year, 11 months ago

Selected Answer: C

Correct

upvoted 11 times

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jsking

Highly Voted 2 years, 5 months ago

Selected Answer: C

Yup! answer is correct!

upvoted 6 times

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seffy

Most Recent 5 months, 2 weeks ago

Selected Answer: C

According to the answers we chose SAMEPERIODLASTYEAR() is more precise

upvoted 1 times

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jaume

7 months, 1 week ago

Selected Answer: C

My vote is also for Option C using SAMEPERIODLASTYEAR() function

upvoted 1 times

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LL_Seva

1 year, 4 months ago

Copy-pasted from MS forum: Previousyear: This function returns all dates from the previous year given the latest date in the input parameter. For example, if the latest date in the dates argument refers to the year 2009, then this function returns all dates for the year of 2008, up to the specified year_end_date. SAMEPERIODLASTYEAR: Returns a table that contains a column of dates shifted one year back in time from the dates in the specified dates column, in the current context.

upvoted 5 times

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Koalakueh

1 year, 7 months ago

A is wrong because of wrong syntax. The close bracket at the end is missing

upvoted 4 times

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VGG2001

1 year, 11 months ago

I tested it in the Power Bi. A and C both give the same result so I think A and C are both correct.

upvoted 2 times

Emarus

1 year, 11 months ago

A is not correct. PREVIOUSYEAR will generate the date from the whole previous year, which means that if your current context is only about 3 months, you're getting a 12 months (from previous year) context, and comparing 3 months with 12 months is nonsense

upvoted 8 times

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Ibritics

1 year, 9 months ago

PREVIOUSYEAR calculates the cumulative till the year

upvoted 2 times

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Aravind_DAS

2 years ago

Why not A?

upvoted 4 times

ZSun

1 year, 11 months ago

"PREVIOUSYEAR: Returns a table that contains a column of all dates from the previous year, given the last date in the dates column, in the current context." This means, if my date data ranges from 2007/08/05 -2007/09/05. The last date in this column is 2007/09/05. The returned column would be 365 date from 2006/01/01 to 2006/12/31. for SAMEPERIODLASTYEAR, the result would only be 2006/08/05 -2006/09/05

upvoted 14 times

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