Explanation:

Code Recap static void GetKeyPhrases ( TextAnalyticsClient textAnalyticsClient, string text)
{
var response = textAnalyticsClient.ExtractKeyPhrases(text);
Console.WriteLine( " Key phrases: " );
foreach ( string keyphrase in response.Value)
{
Console.WriteLine( $ " \t {keyphrase} " );
}
}
Then called with:
GetKeyPhrases(textAnalyticsClient, " the cat sat on the mat " );
* "The call will output key phrases from the input string to the console."
* Yes.
* The method calls ExtractKeyPhrases , iterates over response.Value , and writes each key phrase to the console.
* "The output will contain the following words: the, cat, sat, on, and mat."
* No.
* The Text Analytics key phrase extraction returns meaningful phrases, not stop words or every word.
* Likely result: " cat " , " mat " , maybe " sat " depending on language model. But not " the " , " on
" .
* "The output will contain the confidence level for key phrases."
* No.
* The ExtractKeyPhrases method in Text Analytics API returns only key phrases as strings, not confidence scores.
Statement Analysis
* The call will output key phrases from the input string to the console # Yes
* The output will contain the following words: the, cat, sat, on, and mat # No
* The output will contain the confidence level for key phrases # No
Final Answer
* Azure Text Analytics - Key Phrase Extraction
* TextAnalyticsClient.ExtractKeyPhrases
Microsoft References