{"id":23758,"date":"2026-06-03T04:23:11","date_gmt":"2026-06-03T04:23:11","guid":{"rendered":"https:\/\/sharpinterview.online\/?sharp_quiz=java-interview-equals-hashcode-comparison"},"modified":"2026-06-03T04:23:11","modified_gmt":"2026-06-03T04:23:11","slug":"java-interview-equals-hashcode-comparison","status":"publish","type":"sharp_quiz","link":"https:\/\/sharpinterview.online\/?sharp_quiz=java-interview-equals-hashcode-comparison","title":{"rendered":"Java: In Java, which comparison about equals() and hashCode() Contract is accurate?"},"content":{"rendered":"<h2>Question<\/h2>\n<p>In Java, which comparison about equals() and hashCode() Contract is accurate?<\/p>\n<ol type=\"A\">\n<li>There is no practical difference in behavior, performance, or API design when equals() and hashCode() Contract is involved.<\/li>\n<li>hashCode narrows the candidate bucket in hash-based collections, and equals confirms actual logical equality.<\/li>\n<li>The oldest option related to equals() and hashCode() Contract is always the right production choice regardless of context.<\/li>\n<li>Differences around equals() and hashCode() Contract are mostly cosmetic, so correctness and maintainability do not change.<\/li>\n<\/ol>\n<h2>Hint<\/h2>\n<p>Focus on the behavior or tradeoff, not just the keyword.<\/p>\n<h2>Answer and rationale<\/h2>\n<p><strong>Correct answer:<\/strong> B. hashCode narrows the candidate bucket in hash-based collections, and equals confirms actual logical equality.<\/p>\n<p>hashCode narrows the candidate bucket in hash-based collections, and equals confirms actual logical equality. This is the comparison that usually separates memorization from understanding.<\/p>\n<p><strong>Track:<\/strong> Java<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In Java, which comparison about equals() and hashCode() Contract is accurate?<\/p>\n","protected":false},"author":1,"featured_media":0,"template":"","topic":[12,3,4],"difficulty":[6],"class_list":["post-23758","sharp_quiz","type-sharp_quiz","status-publish","hentry","topic-core-java-equals-and-hashcode-contract","topic-java","topic-java-interview-questions","difficulty-easy"],"_links":{"self":[{"href":"https:\/\/sharpinterview.online\/index.php?rest_route=\/wp\/v2\/sharp_quiz\/23758","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=23758"}],"wp:term":[{"taxonomy":"topic","embeddable":true,"href":"https:\/\/sharpinterview.online\/index.php?rest_route=%2Fwp%2Fv2%2Ftopic&post=23758"},{"taxonomy":"difficulty","embeddable":true,"href":"https:\/\/sharpinterview.online\/index.php?rest_route=%2Fwp%2Fv2%2Fdifficulty&post=23758"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}