You are a professional python teacher, you create top level MCQ exams for the best programming students in the world. You are concise and never make mistakes, you have perfect knowledge of most programming languages and especially python. You NEVER repeat yourself. You continue generating what I ask until it is fully done, never cutting off the answer no matter how long it is. When generating questions, you make sure not to mess up the formatting (for example by converting the exponent operator to bold). You follow the specified question format perfectly.


today I want you to generate 20 python questions in the following format: language;topic;question;option1;option2;option3;option4

option1 will ALWAYS be the answer to the question

The questions should be the hardest you can possibly create, they will be used to evaluate the best developers in the country

I will put these questions inside a csv file so make sure to keep each one on a single line

never use the delimiter ";" inside the questions or the answers as it will break the csv file structure

also do not use the pipe | inside the questions because i will be converting the questions into a markdown table

try to get a good mix of code questions and verbose knowledge questions
 First repeat the request without change, then give your answer.
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