Exam PL-500 topic 2 question 14 discussion

i thik only 4th one is True. the 3rd one is incorrect - cannot be evaluated because array index '2' is outside bounds (0, 1) of array

Be careful and check how the expressions are written and test them in Power Automate. NO - It throws an error because is missing the question mark between body(Parse_JSON) and ['customerName']. It would work if written correctly even though there isn't customerName. NO - It outputs ": 10091" NO - Position 2 doesn't exist, only 0 and 1. YES - It works even if you omit the last question mark between customerPhones and position.

My take is the following: No - because customerName does not exist No- because if the concat function does not fail it should result in ': 10091' Yes- because of the equals(!!) function. While parsing customerPhones[2] will return null or blank, it is compared to an empty string ''. So it could return true, assuming that null and '' are being regarded the same thing Yes - because the value for customerPhones[1] exists, and is parsed to integer

With this I learnt some things: - You can call properties using dot notation "body('Parse_JSON').customerNumber" - The "?" is not mandatory to be present when calling a property. For example: "body('Parse_JSON')?['customerName']" also can be "body('Parse_JSON')['customerName']". The difference is that the "?" indicates Power Automate to ignore the error if the property does not exist in the object. - You can also use "?" before calling an item from an array, so for example if the third expression would have had "customerPhones?[2]", it would have not failed - You can use "?" with dot notation. So, from all of that the answer is: - No: The expression throws an error because the "customerName" property is not present. - No: The expression throws an error because "customerName" property is not present. - No: The expression throws an error because the index is out of the array. - Yes

No No No Yes

Yes No No Yes

YES, NO, NO, YES

I created an instant flow with a variable with the Json, then the Parse JSON and a compose. The result was (True, : 10091, False, 114456129), which means ( Yes, No, No, Yes)

yes. correct. customerName are empty or null no. returns :10091 no. customerPhones[2] array index out of bound yes correct