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Exam SC-400 topic 2 question 21 discussion

Actual exam question from Microsoft's SC-400

Question #: 21
Topic #: 2

HOTSPOT -
You have a Microsoft 365 tenant that uses data loss prevention (DLP) to protect sensitive information.
You create a new custom sensitive info type that has the matching element shown in the following exhibit.

The supporting elements are configured as shown in the following exhibit.

The confidence level and character proximity are configured as shown in the following exhibit.

For each of the following statements, select Yes if statement is true. Otherwise, select No
NOTE: Each correct selection is worth one point.
Hot Area:

Show Suggested Answer

Suggested Answer:

Note: The regular expression has a starts with (^) and ends with ($) metacharacter and will not match any of the sentences. Without the starts with (^) metacharacter the first and second sentences would match and the supporting element (Employee ID) would be within 100 character proximity.
Reference:
https://docs.microsoft.com/en-us/microsoft-365/compliance/create-a-custom-sensitive-information-type?view=o365-worldwide

by Bongconnection at Oct. 23, 2021, 10:44 a.m.

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zaspamer

Highly Voted 3 years, 5 months ago

The answer is no due to a } instead of a ). The correct query would be ^(\d{3}(-)){3}\d{3}|\d{12}$ . Then both A and B would have been corrected. Tested with https://regex101.com/

upvoted 17 times

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PsiCzar

Most Recent 10 months ago

No for all. Regex is invalid, 3rd "}" doesn't have a matching "{", validated it with regex101.com

upvoted 1 times

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Sam12

3 years, 4 months ago

regardless of the errors on the regex: First regex (before the |) will never work because the options that contain digits and hyphens, the strings never starts with a digit (required by the regex because of the ^) Second regex (after the |) (12 digits) must end on a digit ($), none of the options end on a digit. NO for all the options.

upvoted 4 times

dmonton

3 years, 2 months ago

The dot is not part of the text. Microsoft allways ends the answers with a dot. So if in the case that the regular expresión is written correctly second is YES. If the regular expresion is written with the } instead of ) all are NO

upvoted 4 times

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nupagazi

3 years, 4 months ago

I tested with regex101; should be all No, the 12 digit number should start from begining (^); and yes, ) instead of }. The correct regex should be: ^(\d{3}(-)){3}\d{3}|\d{12}$

upvoted 3 times

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xlws

3 years, 6 months ago

that is 3 numbers - 3 numbers - 3 numbers - 3 numbers or 12 numbers, I vote for yes,no,no.

upvoted 3 times

sergioandreslq

3 years, 5 months ago

Nop, The issue is the "^" which for the maching at the beggining of the line. I believe it is No, no, no. I tested the regex on: https://regex101.com/ 1st Capturing Group (\d{3}(-)){3} {3} matches the previous token exactly 3 times A repeated capturing group will only capture the last iteration. Put a capturing group around the repeated group to capture all iterations or use a non-capturing group instead if you're not interested in the data \d matches a digit (equivalent to [0-9]) {3} matches the previous token exactly 3 times 2nd Capturing Group (-) - matches the character - with index 4510 (2D16 or 558) literally (case sensitive) \d matches a digit (equivalent to [0-9]) {3} matches the previous token exactly 3 times 2nd Alternative \d{12} \d matches a digit (equivalent to [0-9]) {12} matches the previous token exactly 12 times

upvoted 5 times

Boeroe

8 months, 3 weeks ago

Agree, the ^ is the reason the regex wont work. Microsoft article: https://learn.microsoft.com/en-us/purview/dlp-policy-learn-about-regex-use#example-of-using-a-regex-in-a-dlp-policy-rule

upvoted 1 times

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klosedotorg83

3 years, 7 months ago

The regular expression ^ (\ d {3} (-)} {3} \ d {3} | \ d {12} $ shown in the exhibit is incorrect, so none statetement will match. It should be like this ^ (\ d {3} (-)) {3} \ d {3} | \ d {12} $. So, the second statement will match if the regular expression is fixed.

upvoted 4 times

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Bongconnection

3 years, 7 months ago

option 2nd, 9 digit number matches regular expression... so is 2nd TRUE? not sure

upvoted 1 times

Sam12

3 years, 4 months ago

no because regex ends in $ which means that there can be nothing after the last digit, but you have the dot, so it does not match.

upvoted 2 times

dmonton

3 years, 2 months ago

The dot is not part of the text. Microsoft allways ends the answers with a dot

upvoted 2 times

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