{"id":158,"date":"2026-07-12T16:12:49","date_gmt":"2026-07-12T16:12:49","guid":{"rendered":"https:\/\/esleducert.com\/?p=158"},"modified":"2026-07-12T16:12:49","modified_gmt":"2026-07-12T16:12:49","slug":"javascript","status":"publish","type":"post","link":"https:\/\/esleducert.com\/?p=158","title":{"rendered":"JAVASCRIPT"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>\u03a3\u03cd\u03bd\u03c4\u03bf\u03bc\u03b7 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03b5\u03ba\u03c0\u03b1\u03b9\u03b4\u03b5\u03c5\u03c4\u03b9\u03ba\u03bf\u03cd \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u03a4\u03bf \u03b5\u03ba\u03c0\u03b1\u03b9\u03b4\u03b5\u03c5\u03c4\u03b9\u03ba\u03cc \u03c5\u03bb\u03b9\u03ba\u03cc \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03b6\u03b5\u03b9 \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03c0\u03c1\u03bf\u03c7\u03c9\u03c1\u03b7\u03bc\u03ad\u03bd\u03b5\u03c2 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\u03c4\u03bf\u03c5 \u03a0\u03b1\u03b3\u03ba\u03cc\u03c3\u03bc\u03b9\u03bf\u03c5 \u0399\u03c3\u03c4\u03bf\u03cd \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5 \u03c0\u03c1\u03c9\u03c4\u03bf\u03ba\u03cc\u03bb\u03bb\u03bf\u03c5 HTTP,<\/li>\n\n\n\n<li>\u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03bf\u03cd\u03bd \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03b9\u03c3\u03c4\u03bf\u03c3\u03b5\u03bb\u03af\u03b4\u03b5\u03c2 \u03bc\u03b5 \u03c7\u03c1\u03ae\u03c3\u03b7 HTML \u03ba\u03b1\u03b9 HTML5,<\/li>\n\n\n\n<li>\u03bc\u03bf\u03c1\u03c6\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd \u03b9\u03c3\u03c4\u03bf\u03c3\u03b5\u03bb\u03af\u03b4\u03b5\u03c2 \u03bc\u03b5 CSS \u03ba\u03b1\u03b9 CSS3,<\/li>\n\n\n\n<li>\u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd Flexbox, CSS Grid \u03ba\u03b1\u03b9 Bootstrap \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 responsive 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JavaScript,<\/li>\n\n\n\n<li>\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bf\u03cd\u03bd \u03c4\u03b7 \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7 \u03c3\u03c5\u03bc\u03b2\u03ac\u03bd\u03c4\u03c9\u03bd \u03ba\u03b1\u03b9 \u03c4\u03bf Document Object Model,<\/li>\n\n\n\n<li>\u03b5\u03c6\u03b1\u03c1\u03bc\u03cc\u03b6\u03bf\u03c5\u03bd \u03b1\u03c3\u03cd\u03b3\u03c7\u03c1\u03bf\u03bd\u03bf \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03bc\u03cc \u03bc\u03b5 Promises \u03ba\u03b1\u03b9 async\/await,<\/li>\n\n\n\n<li>\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bf\u03cd\u03bd \u03c4\u03b7 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03c4\u03b7\u03c2 JavaScript \u03c3\u03c4\u03b7\u03bd \u03c0\u03bb\u03b5\u03c5\u03c1\u03ac \u03c4\u03bf\u03c5 \u03b5\u03be\u03c5\u03c0\u03b7\u03c1\u03b5\u03c4\u03b7\u03c4\u03ae \u03bc\u03ad\u03c3\u03c9 Node.js,<\/li>\n\n\n\n<li>\u03b5\u03b3\u03ba\u03b1\u03b8\u03b9\u03c3\u03c4\u03bf\u03cd\u03bd \u03ba\u03b1\u03b9 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\u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03b4\u03b9\u03bf\u03af\u03ba\u03b7\u03c3\u03b7\u03c2,<\/li>\n\n\n\n<li>\u03b5\u03be\u03b7\u03b3\u03bf\u03cd\u03bd \u03c4\u03b7 \u03bc\u03b5\u03c4\u03ac\u03b2\u03b1\u03c3\u03b7 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03c0\u03b1\u03c1\u03b1\u03b4\u03bf\u03c3\u03b9\u03b1\u03ba\u03ac \u03a0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03b9\u03b1\u03ba\u03ac \u03a3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c3\u03c4\u03b1 \u03a0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03b9\u03b1\u03ba\u03ac \u03a3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c3\u03c4\u03bf \u0394\u03b9\u03b1\u03b4\u03af\u03ba\u03c4\u03c5\u03bf,<\/li>\n\n\n\n<li>\u03b1\u03bd\u03b1\u03b3\u03bd\u03c9\u03c1\u03af\u03b6\u03bf\u03c5\u03bd \u03b2\u03b1\u03c3\u03b9\u03ba\u03ac \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b7\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03b1 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03bf\u03bd\u03b9\u03ba\u03bf\u03cd \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b5\u03af\u03bd \u03ba\u03b1\u03b9 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03bf\u03bd\u03b9\u03ba\u03bf\u03cd \u03b5\u03bc\u03c0\u03bf\u03c1\u03af\u03bf\u03c5,<\/li>\n\n\n\n<li>\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bf\u03cd\u03bd \u03c4\u03b7 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03b9\u03ce\u03bd \u03b9\u03c3\u03c4\u03bf\u03cd, web portals, e-marketplaces \u03ba\u03b1\u03b9 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ce\u03bd cloud,<\/li>\n\n\n\n<li>\u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03ac\u03c6\u03bf\u03c5\u03bd \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b5\u03c2 \u03c0\u03b5\u03bb\u03ac\u03c4\u03b7, \u03cc\u03c0\u03c9\u03c2 HTML, CSS, JavaScript, XML, JSON, JQuery \u03ba\u03b1\u03b9 AJAX,<\/li>\n\n\n\n<li>\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bf\u03cd\u03bd \u03c4\u03b7 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 application servers, servlets, JSP \u03ba\u03b1\u03b9 \u03b1\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ae\u03c2 MVC,<\/li>\n\n\n\n<li>\u03b1\u03bd\u03b1\u03b3\u03bd\u03c9\u03c1\u03af\u03b6\u03bf\u03c5\u03bd \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03ad\u03bd\u03bd\u03bf\u03b9\u03b5\u03c2 Web Services, SOA, SOAP, WSDL, UDDI \u03ba\u03b1\u03b9 RESTful \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03b9\u03ce\u03bd,<\/li>\n\n\n\n<li>\u03b1\u03bd\u03b1\u03b3\u03bd\u03c9\u03c1\u03af\u03b6\u03bf\u03c5\u03bd \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03b1\u03c0\u03b5\u03b9\u03bb\u03ad\u03c2 \u03b1\u03c3\u03c6\u03ac\u03bb\u03b5\u03b9\u03b1\u03c2 \u03b4\u03b9\u03b1\u03b4\u03b9\u03ba\u03c4\u03c5\u03b1\u03ba\u03ce\u03bd \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ce\u03bd, \u03cc\u03c0\u03c9\u03c2 SQL injection, XSS \u03ba\u03b1\u03b9 CSRF,<\/li>\n\n\n\n<li>\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bf\u03cd\u03bd \u03c4\u03b7 \u03c3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1 \u03c4\u03b7\u03c2 \u03b5\u03bc\u03c0\u03b9\u03c3\u03c4\u03b5\u03c5\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2, \u03b1\u03ba\u03b5\u03c1\u03b1\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03b4\u03b9\u03b1\u03b8\u03b5\u03c3\u03b9\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03c3\u03c4\u03b1 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03b9\u03b1\u03ba\u03ac \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1,<\/li>\n\n\n\n<li>\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bf\u03cd\u03bd \u03c4\u03b7\u03bd \u03ad\u03bd\u03bd\u03bf\u03b9\u03b1 \u03c4\u03c9\u03bd \u039a\u03b1\u03c4\u03b1\u03bd\u03b5\u03bc\u03b7\u03bc\u03ad\u03bd\u03c9\u03bd \u03a3\u03c5\u03c3\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03c3\u03c7\u03ad\u03c3\u03b7 \u03c4\u03bf\u03c5\u03c2 \u03bc\u03b5 \u03c4\u03b1 \u03a0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03b9\u03b1\u03ba\u03ac \u03a3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1,<\/li>\n\n\n\n<li>\u03b4\u03b9\u03b1\u03ba\u03c1\u03af\u03bd\u03bf\u03c5\u03bd \u03ba\u03b5\u03bd\u03c4\u03c1\u03b9\u03ba\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03b1 \u03ba\u03b1\u03b9 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b5\u03bc\u03b7\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1,<\/li>\n\n\n\n<li>\u03b1\u03bd\u03b1\u03b3\u03bd\u03c9\u03c1\u03af\u03b6\u03bf\u03c5\u03bd \u03c4\u03b1 \u03c0\u03bb\u03b5\u03bf\u03bd\u03b5\u03ba\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5\u03c2 \u03c0\u03b5\u03c1\u03b9\u03bf\u03c1\u03b9\u03c3\u03bc\u03bf\u03cd\u03c2 \u03c4\u03c9\u03bd \u03ba\u03b1\u03c4\u03b1\u03bd\u03b5\u03bc\u03b7\u03bc\u03ad\u03bd\u03c9\u03bd \u03c3\u03c5\u03c3\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd,<\/li>\n\n\n\n<li>\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bf\u03cd\u03bd \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03b1\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b5\u03bc\u03b7\u03bc\u03ad\u03bd\u03c9\u03bd \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ce\u03bd, \u03cc\u03c0\u03c9\u03c2 \u03c0\u03b5\u03bb\u03ac\u03c4\u03b7-\u03b5\u03be\u03c5\u03c0\u03b7\u03c1\u03b5\u03c4\u03b7\u03c4\u03ae, \u03c0\u03bf\u03bb\u03c5\u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03b9\u03bf\u03c3\u03c4\u03c1\u03b5\u03c6\u03b5\u03af\u03c2 \u03b1\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2,<\/li>\n\n\n\n<li>\u03b5\u03be\u03b7\u03b3\u03bf\u03cd\u03bd \u03c4\u03b7 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 middleware, SOA, Web Services, CORBA, RMI, DCOM \u03ba\u03b1\u03b9 RPC,<\/li>\n\n\n\n<li>\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bf\u03cd\u03bd \u03c4\u03b7\u03bd \u03ad\u03bd\u03bd\u03bf\u03b9\u03b1 \u03b4\u03b9\u03b5\u03c1\u03b3\u03b1\u03c3\u03b9\u03ce\u03bd \u03ba\u03b1\u03b9 \u03bd\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd,<\/li>\n\n\n\n<li>\u03b5\u03c6\u03b1\u03c1\u03bc\u03cc\u03b6\u03bf\u03c5\u03bd \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03b1\u03c1\u03c7\u03ad\u03c2 \u03c0\u03bf\u03bb\u03c5\u03bd\u03b7\u03bc\u03b1\u03c4\u03b9\u03ba\u03bf\u03cd \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03bc\u03bf\u03cd \u03ba\u03b1\u03b9 \u03c3\u03c5\u03b3\u03c7\u03c1\u03bf\u03bd\u03b9\u03c3\u03bc\u03bf\u03cd,<\/li>\n\n\n\n<li>\u03b1\u03bd\u03b1\u03b3\u03bd\u03c9\u03c1\u03af\u03b6\u03bf\u03c5\u03bd \u03c0\u03c1\u03bf\u03b2\u03bb\u03ae\u03bc\u03b1\u03c4\u03b1 \u03cc\u03c0\u03c9\u03c2 race condition, deadlock \u03ba\u03b1\u03b9 starvation,<\/li>\n\n\n\n<li>\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bf\u03cd\u03bd \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03af\u03b5\u03c2 \u03bf\u03bd\u03bf\u03bc\u03b1\u03c4\u03bf\u03b4\u03bf\u03c3\u03af\u03b1\u03c2, \u03b5\u03c5\u03c1\u03b5\u03c4\u03b7\u03c1\u03af\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03b5\u03bd\u03c4\u03bf\u03c0\u03b9\u03c3\u03bc\u03bf\u03cd \u03c0\u03cc\u03c1\u03c9\u03bd, \u03cc\u03c0\u03c9\u03c2 DNS, LDAP \u03ba\u03b1\u03b9 Active Directory,<\/li>\n\n\n\n<li>\u03b5\u03be\u03b7\u03b3\u03bf\u03cd\u03bd \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03ad\u03bd\u03bd\u03bf\u03b9\u03b5\u03c2 \u03c3\u03c5\u03b3\u03c7\u03c1\u03bf\u03bd\u03b9\u03c3\u03bc\u03bf\u03cd \u03c3\u03b5 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b5\u03bc\u03b7\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1, \u03cc\u03c0\u03c9\u03c2 \u03c6\u03c5\u03c3\u03b9\u03ba\u03ac \u03c1\u03bf\u03bb\u03cc\u03b3\u03b9\u03b1, \u03bb\u03bf\u03b3\u03b9\u03ba\u03ac \u03c1\u03bf\u03bb\u03cc\u03b3\u03b9\u03b1, Lamport \u03ba\u03b1\u03b9 \u03b4\u03b9\u03b1\u03bd\u03c5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac \u03c1\u03bf\u03bb\u03cc\u03b3\u03b9\u03b1,<\/li>\n\n\n\n<li>\u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03ac\u03c6\u03bf\u03c5\u03bd \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03b1\u03c1\u03c7\u03ad\u03c2 \u03b1\u03bc\u03bf\u03b9\u03b2\u03b1\u03af\u03bf\u03c5 \u03b1\u03c0\u03bf\u03ba\u03bb\u03b5\u03b9\u03c3\u03bc\u03bf\u03cd \u03ba\u03b1\u03b9 \u03b5\u03ba\u03bb\u03bf\u03b3\u03ae\u03c2 \u03b1\u03c1\u03c7\u03b7\u03b3\u03bf\u03cd \u03c3\u03b5 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b5\u03bc\u03b7\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1,<\/li>\n\n\n\n<li>\u03b1\u03bd\u03b1\u03b3\u03bd\u03c9\u03c1\u03af\u03b6\u03bf\u03c5\u03bd \u03b2\u03b1\u03c3\u03b9\u03ba\u03bf\u03cd\u03c2 \u03bc\u03b7\u03c7\u03b1\u03bd\u03b9\u03c3\u03bc\u03bf\u03cd\u03c2 \u03c0\u03c1\u03bf\u03c3\u03c4\u03b1\u03c3\u03af\u03b1\u03c2, \u03cc\u03c0\u03c9\u03c2 \u03ba\u03c1\u03c5\u03c0\u03c4\u03bf\u03b3\u03c1\u03b1\u03c6\u03af\u03b1, firewalls, VPN, IPsec, IDS \u03ba\u03b1\u03b9 IPS,<\/li>\n\n\n\n<li>\u03b1\u03bd\u03c4\u03b9\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c4\u03b7 \u03c3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1 \u03c4\u03b7\u03c2 \u03c3\u03c9\u03c3\u03c4\u03ae\u03c2 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7\u03c2, \u03c3\u03c7\u03b5\u03b4\u03af\u03b1\u03c3\u03b7\u03c2, \u03b1\u03c3\u03c6\u03ac\u03bb\u03b5\u03b9\u03b1\u03c2, \u03b4\u03b9\u03b1\u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03c3\u03c5\u03bd\u03c4\u03b7\u03c1\u03b7\u03c3\u03b9\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b1\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7 \u03c3\u03cd\u03b3\u03c7\u03c1\u03bf\u03bd\u03c9\u03bd \u03b4\u03b9\u03b1\u03b4\u03b9\u03ba\u03c4\u03c5\u03b1\u03ba\u03ce\u03bd \u03ba\u03b1\u03b9 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b5\u03bc\u03b7\u03bc\u03ad\u03bd\u03c9\u03bd 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