{"id":27640,"date":"2026-06-03T04:27:21","date_gmt":"2026-06-03T04:27:21","guid":{"rendered":"https:\/\/sharpinterview.online\/?sharp_quiz=python-interview-mutable-default-arguments-usage"},"modified":"2026-06-03T04:27:21","modified_gmt":"2026-06-03T04:27:21","slug":"python-interview-mutable-default-arguments-usage","status":"publish","type":"sharp_quiz","link":"https:\/\/sharpinterview.online\/?sharp_quiz=python-interview-mutable-default-arguments-usage","title":{"rendered":"Python: When should a Python developer choose Mutable Default Arguments deliberately?"},"content":{"rendered":"<h2>Question<\/h2>\n<p>When should a Python developer choose Mutable Default Arguments deliberately?<\/p>\n<ol type=\"A\">\n<li>Choose Mutable Default Arguments mainly when you want to postpone validation and fix issues manually later.<\/li>\n<li>Choose Mutable Default Arguments whenever you want the code to look more advanced, even if the design gets less clear.<\/li>\n<li>Choose Mutable Default Arguments only to avoid modeling the real data shape or domain contract explicitly.<\/li>\n<li>Choose a sentinel such as None when the function needs a fresh list or dict for each invocation.<\/li>\n<\/ol>\n<h2>Hint<\/h2>\n<p>Think about the production scenario where the choice genuinely improves the code.<\/p>\n<h2>Answer and rationale<\/h2>\n<p><strong>Correct answer:<\/strong> D. Choose a sentinel such as None when the function needs a fresh list or dict for each invocation.<\/p>\n<p>Choose a sentinel such as None when the function needs a fresh list or dict for each invocation. Interviewers often ask this to see whether you can connect the concept to real design decisions.<\/p>\n<p><strong>Track:<\/strong> Python<\/p>\n","protected":false},"excerpt":{"rendered":"<p>When should a Python developer choose Mutable Default Arguments deliberately?<\/p>\n","protected":false},"author":1,"featured_media":0,"template":"","topic":[88,91,89],"difficulty":[7],"class_list":["post-27640","sharp_quiz","type-sharp_quiz","status-publish","hentry","topic-python","topic-python-core-mutable-default-arguments","topic-python-interview-questions","difficulty-medium"],"_links":{"self":[{"href":"https:\/\/sharpinterview.online\/index.php?rest_route=\/wp\/v2\/sharp_quiz\/27640","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sharpinterview.online\/index.php?rest_route=\/wp\/v2\/sharp_quiz"}],"about":[{"href":"https:\/\/sharpinterview.online\/index.php?rest_route=\/wp\/v2\/types\/sharp_quiz"}],"author":[{"embeddable":true,"href":"https:\/\/sharpinterview.online\/index.php?rest_route=\/wp\/v2\/users\/1"}],"wp:attachment":[{"href":"https:\/\/sharpinterview.online\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27640"}],"wp:term":[{"taxonomy":"topic","embeddable":true,"href":"https:\/\/sharpinterview.online\/index.php?rest_route=%2Fwp%2Fv2%2Ftopic&post=27640"},{"taxonomy":"difficulty","embeddable":true,"href":"https:\/\/sharpinterview.online\/index.php?rest_route=%2Fwp%2Fv2%2Fdifficulty&post=27640"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}