{"id":24135,"date":"2026-06-03T04:23:32","date_gmt":"2026-06-03T04:23:32","guid":{"rendered":"https:\/\/sharpinterview.online\/?sharp_quiz=java-interview-concurrentskiplistmap-pitfall"},"modified":"2026-06-03T04:23:32","modified_gmt":"2026-06-03T04:23:32","slug":"java-interview-concurrentskiplistmap-pitfall","status":"publish","type":"sharp_quiz","link":"https:\/\/sharpinterview.online\/?sharp_quiz=java-interview-concurrentskiplistmap-pitfall","title":{"rendered":"Java: Which practice avoids a common mistake with ConcurrentSkipListMap?"},"content":{"rendered":"<h2>Question<\/h2>\n<p>Which practice avoids a common mistake with ConcurrentSkipListMap?<\/p>\n<ol type=\"A\">\n<li>Ignore the ConcurrentSkipListMap issue and rely on team discipline instead of APIs or contracts.<\/li>\n<li>Silence the ConcurrentSkipListMap problem by using raw types, broad catches, or shared mutable state.<\/li>\n<li>Do not pick a skip-list map when you only need direct key lookup and do not care about sorted navigation.<\/li>\n<li>Prefer the version of ConcurrentSkipListMap that makes behavior less predictable as long as the code compiles.<\/li>\n<\/ol>\n<h2>Hint<\/h2>\n<p>Look for the option that protects correctness instead of hiding the problem.<\/p>\n<h2>Answer and rationale<\/h2>\n<p><strong>Correct answer:<\/strong> C. Do not pick a skip-list map when you only need direct key lookup and do not care about sorted navigation.<\/p>\n<p>Do not pick a skip-list map when you only need direct key lookup and do not care about sorted navigation. This is a common failure mode in real Java code and a frequent interview follow-up.<\/p>\n<p><strong>Track:<\/strong> Java<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Which practice avoids a common mistake with ConcurrentSkipListMap?<\/p>\n","protected":false},"author":1,"featured_media":0,"template":"","topic":[87,3,4],"difficulty":[7],"class_list":["post-24135","sharp_quiz","type-sharp_quiz","status-publish","hentry","topic-concurrency-concurrentskiplistmap","topic-java","topic-java-interview-questions","difficulty-medium"],"_links":{"self":[{"href":"https:\/\/sharpinterview.online\/index.php?rest_route=\/wp\/v2\/sharp_quiz\/24135","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=24135"}],"wp:term":[{"taxonomy":"topic","embeddable":true,"href":"https:\/\/sharpinterview.online\/index.php?rest_route=%2Fwp%2Fv2%2Ftopic&post=24135"},{"taxonomy":"difficulty","embeddable":true,"href":"https:\/\/sharpinterview.online\/index.php?rest_route=%2Fwp%2Fv2%2Fdifficulty&post=24135"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}