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Microsoft DP-420 Exam - Topic 15 Question 43 Discussion

You have an Azure Cosmos DB Core (SQL) API account.You run the following query against a container in the account.SELECTIS_NUMBER("1234") AS A,IS_NUMBER(1234) AS B,IS_NUMBER({prop: 1234}) AS CWhat is the output of the query?
B) [{'A': true, 'B': false, 'C': true}]
A) [{'A': false, 'B': true, 'C': false}]
C) [{'A': true, 'B': true, 'C': false}]
D) [{'A': true, 'B': true, 'C': true}]

Microsoft DP-420 Exam - Topic 15 Question 43 Discussion

Actual exam question for Microsoft's DP-420 exam
Question #: 43
Topic #: 15
[All DP-420 Questions]

You have an Azure Cosmos DB Core (SQL) API account.

You run the following query against a container in the account.

SELECT

IS_NUMBER("1234") AS A,

IS_NUMBER(1234) AS B,

IS_NUMBER({prop: 1234}) AS C

What is the output of the query?

Show Suggested Answer Hide Answer
Suggested Answer: B

by Daron at Jul 06, 2024, 08:31 AM

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Micaela
7 months ago
Huh, I didn't expect that! Why is IS_NUMBER on a string false?
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Helene
7 months ago
I think C should be true since it's a number in an object.
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Fannie
8 months ago
Totally agree with the output being A! Makes sense.
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Janessa
8 months ago
Wait, I thought IS_NUMBER would return true for strings that look like numbers?
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Whitley
8 months ago
A is false, B is true, C is false. That's the output!
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Lindsay
8 months ago
I’m leaning towards option C, but I’m not completely confident about how IS_NUMBER handles different data types in Cosmos DB.
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Ula
9 months ago
I practiced a similar question, and I feel like IS_NUMBER({prop: 1234}) would return false because it's an object, not a number.
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Solange
9 months ago
I think IS_NUMBER("1234") should return true since it's a numeric string, but I could be mixing it up with other functions.
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Ernestine
9 months ago
I remember that IS_NUMBER checks if the value is a number type, but I'm not sure about the string input.
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Walton
9 months ago
I think I've got it! The key is understanding how the IS_NUMBER function handles different input types. I'll work through each part of the query and select the correct answer.
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Willard
9 months ago
Okay, let me break this down step-by-step. The IS_NUMBER function checks if the input is a valid number, so I'll need to consider the different data types being passed in.
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Cristy
9 months ago
Hmm, this looks like a tricky one. I'll need to carefully read through the question and think about how the IS_NUMBER function works in Cosmos DB.
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Anika
9 months ago
I'm a bit confused by the third part of the query, where it's checking a property. I'll need to double-check how that works with the IS_NUMBER function.
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Annamae
9 months ago
This seems like a straightforward question. I'd go with option C - modifying the correlation schedule and sensitivity to reduce the false positives.
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Emogene
1 year ago
Is this the Azure Cosmos DB version of 'Is it a bird? Is it a plane? No, it's Superman!'? This is too easy, I was hoping for some real cosmic-level questions.
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Arlene
1 year ago
User3: C) [{\'A\': true, \'B\': true, \'C\': false}]
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Miles
1 year ago
User2: B) [{\'A\': true, \'B\': false, \'C\': true}]
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Hubert
1 year ago
User1: A) [{\'A\': false, \'B\': true, \'C\': false}]
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Talia
1 year ago
I can't believe they're asking us to check if something is a number. Next thing you know, they'll be asking us to check if the sky is blue. But hey, at least it's an easy point on the exam.
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Donette
1 year ago
Hmm, this question is really testing our understanding of JSON and data types. I'm gonna go with option D just to see what happens. Who knows, maybe the Azure Cosmos DB API has some surprises up its sleeve!
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Dana
1 year ago
User 3
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Cristy
1 year ago
User 2
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Catarina
1 year ago
User 1
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Anglea
1 year ago
Aha! I know this one. The IS_NUMBER function returns true if the input is a valid number, and false otherwise. Let's see, the first one is a string, the second one is a number, and the third one is an object with a numeric property. Gotta be option C!
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Hannah
1 year ago
Looks like option C is the winner here.
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Nicolette
1 year ago
So, A is false, B is true, and C is false in this case.
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Margo
1 year ago
Yeah, the IS_NUMBER function should return true for the string and number, but false for the object.
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Gennie
1 year ago
I think you're right, option C seems to be the correct output.
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Floyd
1 year ago
No problem, happy to help.
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Tonja
1 year ago
That makes sense, thanks for explaining.
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Floyd
1 year ago
Because the IS_NUMBER function will return true for a number and false for a string, so option B makes sense.
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Jill
1 year ago
Wait, is the query supposed to check if the input is a number? That's too easy, I was expecting something more complex.
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Eveline
1 year ago
I agree, I was expecting a more complex query as well.
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In
1 year ago
It's a simple query to check if the input is a number.
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Rosamond
1 year ago
User 2: I agree, it seems pretty straightforward.
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Cornell
1 year ago
The output will be [{'A' false, 'B' true, 'C' false}]
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Valentin
1 year ago
Yes, the query is checking if the input is a number.
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Dalene
1 year ago
User 1: Yes, the query is checking if the input is a number.
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Tonja
1 year ago
Why do you think it's option B?
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Floyd
1 year ago
I disagree, I believe the correct answer is option B.
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Tonja
1 year ago
I think the output of the query is option A.
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