{"id":1094,"date":"2026-03-31T22:07:10","date_gmt":"2026-03-31T22:07:10","guid":{"rendered":"https:\/\/www.method-post.com\/vi\/top-20-student-questions-class-diagrams-software-engineering\/"},"modified":"2026-03-31T22:07:10","modified_gmt":"2026-03-31T22:07:10","slug":"top-20-student-questions-class-diagrams-software-engineering","status":"publish","type":"post","link":"https:\/\/www.method-post.com\/vi\/top-20-student-questions-class-diagrams-software-engineering\/","title":{"rendered":"H\u1ecfi & \u0110\u00e1p: Tr\u1ea3 l\u1eddi 20 c\u00e2u h\u1ecfi ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ee7a sinh vi\u00ean v\u1ec1 s\u01a1 \u0111\u1ed3 l\u1edbp v\u00e0 vai tr\u00f2 c\u1ee7a ch\u00fang trong k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m"},"content":{"rendered":"

K\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o c\u00e1c m\u00f4 h\u00ecnh tr\u1ef1c quan \u0111\u1ec3 truy\u1ec1n \u0111\u1ea1t c\u1ea5u tr\u00fac h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p. Trong c\u00e1c chu\u1ea9n ng\u00f4n ng\u1eef m\u00f4 h\u00ecnh h\u00f3a th\u1ed1ng nh\u1ea5t (UML), s\u01a1 \u0111\u1ed3 l\u1edbp n\u1ed5i b\u1eadt nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5 n\u1ec1n t\u1ea3ng cho thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. \u0110\u1ed1i v\u1edbi sinh vi\u00ean m\u1edbi b\u01b0\u1edbc v\u00e0o l\u0129nh v\u1ef1c n\u00e0y, vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y kh\u00f4ng ph\u1ea3i l\u00e0 t\u00f9y ch\u1ecdn; \u0111\u00f3 l\u00e0 m\u1ed9t n\u0103ng l\u1ef1c c\u1ed1t l\u00f5i. H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i \u0111\u00e1p nh\u1eefng th\u1eafc m\u1eafc ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u1ec1 s\u01a1 \u0111\u1ed3 l\u1edbp, cung c\u1ea5p s\u1ef1 r\u00f5 r\u00e0ng v\u1ec1 c\u00e1ch x\u00e2y d\u1ef1ng, m\u1ee5c \u0111\u00edch v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang trong th\u1ef1c ti\u1ec5n k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m.<\/p>\n

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\"Charcoal<\/figure>\n<\/div>\n

1. S\u01a1 \u0111\u1ed3 l\u1edbp th\u1ef1c s\u1ef1 l\u00e0 g\u00ec? \ud83d\udcca<\/h2>\n

S\u01a1 \u0111\u1ed3 l\u1edbp l\u00e0 m\u1ed9t s\u01a1 \u0111\u1ed3 c\u1ea5u tr\u00fac t\u0129nh m\u00f4 t\u1ea3 c\u1ea5u tr\u00fac c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng b\u1eb1ng c\u00e1ch hi\u1ec3n th\u1ecb c\u00e1c l\u1edbp c\u1ee7a h\u1ec7 th\u1ed1ng, thu\u1ed9c t\u00ednh c\u1ee7a ch\u00fang, c\u00e1c thao t\u00e1c (ho\u1eb7c ph\u01b0\u01a1ng th\u1ee9c) v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng. N\u00f3 cung c\u1ea5p b\u1ea3n v\u1ebd ph\u00e1c th\u1ea3o ki\u1ebfn tr\u00fac c\u1ee7a h\u1ec7 th\u1ed1ng. Kh\u00e1c v\u1edbi s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1, th\u1ec3 hi\u1ec7n h\u00e0nh vi \u0111\u1ed9ng theo th\u1eddi gian, s\u01a1 \u0111\u1ed3 l\u1edbp t\u1eadp trung v\u00e0o c\u00e1c danh t\u1eeb trong h\u1ec7 th\u1ed1ng thay v\u00ec c\u00e1c \u0111\u1ed9ng t\u1eeb.<\/p>\n

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  • G\u00f3c nh\u00ecn t\u0129nh:<\/strong> N\u00f3 bi\u1ec3u di\u1ec5n h\u1ec7 th\u1ed1ng t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3.<\/li>\n
  • B\u1ea3n v\u1ebd ph\u00e1c th\u1ea3o:<\/strong> C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n s\u1eed d\u1ee5ng n\u00f3 \u0111\u1ec3 tri\u1ec3n khai m\u00e3 ngu\u1ed3n trong c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh nh\u01b0 Java, C++ ho\u1eb7c Python.<\/li>\n
  • T\u00e0i li\u1ec7u tham kh\u1ea3o:<\/strong> N\u00f3 \u0111\u00f3ng vai tr\u00f2 l\u00e0 t\u00e0i li\u1ec7u tham kh\u1ea3o \u0111\u1ec3 c\u00e1c th\u00e0nh vi\u00ean trong nh\u00f3m hi\u1ec3u \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac d\u1eef li\u1ec7u v\u00e0 logic.<\/li>\n<\/ul>\n

    2. Ba ng\u0103n ch\u00ednh c\u1ee7a m\u1ed9t l\u1edbp l\u00e0 g\u00ec? \ud83d\udce6<\/h2>\n

    C\u00e1c s\u01a1 \u0111\u1ed3 l\u1edbp ti\u00eau chu\u1ea9n chia m\u1ed7i l\u1edbp th\u00e0nh ba ph\u1ea7n ri\u00eang bi\u1ec7t \u0111\u1ec3 t\u1ed5 ch\u1ee9c th\u00f4ng tin m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng.<\/p>\n\n\n\n\n\n
    Ng\u0103n<\/th>\nN\u1ed9i dung<\/th>\n<\/tr>\n
    T\u00ean<\/td>\n\u0110\u1ecbnh danh cho l\u1edbp. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c ghi \u1edf ph\u1ea7n tr\u00ean.<\/td>\n<\/tr>\n
    Thu\u1ed9c t\u00ednh<\/td>\nBi\u1ebfn ho\u1eb7c thu\u1ed9c t\u00ednh d\u1eef li\u1ec7u thu\u1ed9c v\u1ec1 l\u1edbp. N\u1eb1m \u1edf ph\u1ea7n gi\u1eefa.<\/td>\n<\/tr>\n
    Ph\u01b0\u01a1ng th\u1ee9c<\/td>\nC\u00e1c h\u00e0m ho\u1eb7c h\u00e0nh vi m\u00e0 l\u1edbp c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n. N\u1eb1m \u1edf ph\u1ea7n d\u01b0\u1edbi.<\/td>\n<\/tr>\n<\/table>\n

    3. L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 bi\u1ec3u th\u1ecb m\u1ee9c \u0111\u1ed9 hi\u1ec3n th\u1ecb trong s\u01a1 \u0111\u1ed3 l\u1edbp? \ud83d\udd12<\/h2>\n

    C\u00e1c b\u1ed9 ch\u1ecdn m\u1ee9c \u0111\u1ed9 hi\u1ec3n th\u1ecb ki\u1ec3m so\u00e1t quy\u1ec1n truy c\u1eadp v\u00e0o c\u00e1c th\u00e0nh vi\u00ean c\u1ee7a l\u1edbp t\u1eeb b\u00ean ngo\u00e0i l\u1edbp. Ch\u00fang r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi t\u00ednh \u0111\u00f3ng g\u00f3i.<\/p>\n

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    • C\u00f4ng khai (+):<\/strong> C\u00f3 th\u1ec3 truy c\u1eadp t\u1eeb b\u1ea5t k\u1ef3 l\u1edbp n\u00e0o kh\u00e1c. \u0110\u00e2y l\u00e0 m\u1ee9c truy c\u1eadp m\u1edf r\u1ed9ng nh\u1ea5t.<\/li>\n
    • Ri\u00eang t\u01b0 (-):<\/strong> Ch\u1ec9 c\u00f3 th\u1ec3 truy c\u1eadp b\u00ean trong ch\u00ednh l\u1edbp \u0111\u00f3. D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c \u1ea9n kh\u1ecfi th\u1ebf gi\u1edbi b\u00ean ngo\u00e0i.<\/li>\n
    • B\u1ea3o v\u1ec7 (#):<\/strong> C\u00f3 th\u1ec3 truy c\u1eadp trong l\u1edbp v\u00e0 c\u00e1c l\u1edbp con c\u1ee7a n\u00f3 (c\u1ea5u tr\u00fac k\u1ebf th\u1eeba).<\/li>\n
    • G\u00f3i (~):<\/strong> C\u00f3 th\u1ec3 truy c\u1eadp trong c\u00f9ng m\u1ed9t g\u00f3i ho\u1eb7c kh\u00f4ng gian t\u00ean.<\/li>\n<\/ul>\n

      4. S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa li\u00ean k\u1ebft v\u00e0 t\u00edch h\u1ee3p l\u00e0 g\u00ec? \ud83e\udde9<\/h2>\n

      C\u1ea3 hai m\u1ed1i quan h\u1ec7 \u0111\u1ec1u li\u00ean k\u1ebft c\u00e1c l\u1edbp, nh\u01b0ng ch\u00fang kh\u00e1c nhau v\u1ec1 quy\u1ec1n s\u1edf h\u1eefu v\u00e0 ph\u1ee5 thu\u1ed9c v\u00e0o v\u00f2ng \u0111\u1eddi.<\/p>\n

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      • Li\u00ean k\u1ebft:<\/strong>M\u1ed9t m\u1ed1i quan h\u1ec7 t\u1ed5ng qu\u00e1t n\u01a1i c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i. N\u00f3 ng\u1ee5 \u00fd m\u1ed9t li\u00ean k\u1ebft m\u1ea1nh nh\u01b0ng kh\u00f4ng nh\u1ea5t thi\u1ebft l\u00e0 s\u1edf h\u1eefu.<\/li>\n
      • T\u00edch h\u1ee3p:<\/strong>M\u1ed9t lo\u1ea1i li\u00ean k\u1ebft \u0111\u1eb7c bi\u1ec7t th\u1ec3 hi\u1ec7n m\u1ed1i quan h\u1ec7 ‘to\u00e0n th\u1ec3-ph\u1ea7n’, trong \u0111\u00f3 ph\u1ea7n c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i \u0111\u1ed9c l\u1eadp v\u1edbi to\u00e0n th\u1ec3. V\u00ed d\u1ee5, m\u1ed9t Khoa c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i m\u00e0 kh\u00f4ng c\u1ea7n m\u1ed9t Gi\u00e1o s\u01b0 c\u1ee5 th\u1ec3.<\/li>\n<\/ul>\n

        5. Khi n\u00e0o b\u1ea1n n\u00ean s\u1eed d\u1ee5ng k\u1ebft h\u1ee3p thay v\u00ec t\u00edch h\u1ee3p? \ud83c\udfd7\ufe0f<\/h2>\n

        K\u1ebft h\u1ee3p l\u00e0 m\u1ed9t d\u1ea1ng m\u1ea1nh h\u01a1n c\u1ee7a t\u00edch h\u1ee3p. N\u00f3 ng\u1ee5 \u00fd quy\u1ec1n s\u1edf h\u1eefu \u0111\u1ed9c quy\u1ec1n v\u00e0 s\u1ef1 ph\u1ee5 thu\u1ed9c ch\u1eb7t ch\u1ebd v\u00e0o v\u00f2ng \u0111\u1eddi.<\/p>\n

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        • Quy\u1ec1n s\u1edf h\u1eefu:<\/strong>To\u00e0n th\u1ec3 s\u1edf h\u1eefu ph\u1ea7n.<\/li>\n
        • V\u00f2ng \u0111\u1eddi:<\/strong>N\u1ebfu to\u00e0n th\u1ec3 b\u1ecb ph\u00e1 h\u1ee7y, ph\u1ea7n c\u0169ng s\u1ebd b\u1ecb ph\u00e1 h\u1ee7y theo. V\u00ed d\u1ee5, m\u1ed9t Ng\u00f4i nh\u00e0 \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb Ph\u00f2ng. N\u1ebfu Ng\u00f4i nh\u00e0 b\u1ecb ph\u00e1 d\u1ee1, c\u00e1c Ph\u00f2ng s\u1ebd kh\u00f4ng c\u00f2n t\u1ed3n t\u1ea1i trong b\u1ed1i c\u1ea3nh \u0111\u00f3.<\/li>\n
        • K\u00fd hi\u1ec7u tr\u1ef1c quan:<\/strong>M\u1ed9t h\u00ecnh kim c\u01b0\u01a1ng t\u00f4 \u0111\u1ea7y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf ph\u00eda to\u00e0n th\u1ec3 c\u1ee7a \u0111\u01b0\u1eddng n\u1ed1i.<\/li>\n<\/ul>\n

          6. K\u1ebf th\u1eeba tr\u00f4ng nh\u01b0 th\u1ebf n\u00e0o trong UML? \ud83c\udf33<\/h2>\n

          K\u1ebf th\u1eeba cho ph\u00e9p m\u1ed9t l\u1edbp m\u1edbi ti\u1ebfp nh\u1eadn c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 h\u00e0nh vi c\u1ee7a m\u1ed9t l\u1edbp hi\u1ec7n c\u00f3. \u0110i\u1ec1u n\u00e0y h\u1ed7 tr\u1ee3 t\u00e1i s\u1eed d\u1ee5ng m\u00e3 v\u00e0 c\u1ea5u tr\u00fac ph\u00e2n c\u1ea5p.<\/p>\n

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          • K\u00fd hi\u1ec7u:<\/strong>M\u1ed9t \u0111\u01b0\u1eddng li\u1ec1n v\u1edbi m\u0169i t\u00ean tam gi\u00e1c r\u1ed7ng h\u01b0\u1edbng v\u1ec1 l\u1edbp cha.<\/li>\n
          • Thu\u1eadt ng\u1eef:<\/strong>L\u1edbp con th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 l\u1edbp con ho\u1eb7c l\u1edbp \u0111\u01b0\u1ee3c t\u1ea1o ra; l\u1edbp cha l\u00e0 l\u1edbp cha ho\u1eb7c l\u1edbp c\u01a1 s\u1edf.<\/li>\n
          • V\u00ed d\u1ee5:<\/strong>M\u1ed9t Ph\u01b0\u01a1ng ti\u1ec7n<\/code>l\u1edbp c\u00f3 th\u1ec3 l\u00e0 l\u1edbp cha cho Xe h\u01a1i<\/code> v\u00e0 Xe t\u1ea3i<\/code>c\u00e1c l\u1edbp con.<\/li>\n<\/ul>\n

            7. Giao di\u1ec7n \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n nh\u01b0 th\u1ebf n\u00e0o trong s\u01a1 \u0111\u1ed3 l\u1edbp? \u26a1<\/h2>\n

            Giao di\u1ec7n \u0111\u1ecbnh ngh\u0129a m\u1ed9t h\u1ee3p \u0111\u1ed3ng h\u00e0nh vi m\u00e0 kh\u00f4ng c\u00f3 tri\u1ec3n khai. Ch\u00fang r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi t\u00ednh \u0111a h\u00ecnh.<\/p>\n

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            • T\u00ean:<\/strong>Th\u01b0\u1eddng \u0111\u01b0\u1ee3c ti\u1ec1n t\u1ed1 b\u1eb1ng <<interface>>.<\/li>\n
            • M\u1ed1i quan h\u1ec7:<\/strong>M\u1ed9t l\u1edbp \u2018th\u1ef1c hi\u1ec7n\u2019 m\u1ed9t giao di\u1ec7n, th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng m\u1ed9t \u0111\u01b0\u1eddng n\u00e9t \u0111\u1ee9t c\u00f3 m\u0169i t\u00ean tam gi\u00e1c r\u1ed7ng.<\/li>\n
            • M\u1ee5c \u0111\u00edch:<\/strong>Cho ph\u00e9p c\u00e1c l\u1edbp kh\u00e1c nhau tri\u1ec3n khai c\u00f9ng m\u1ed9t t\u1eadp h\u1ee3p ph\u01b0\u01a1ng th\u1ee9c trong khi c\u00f3 logic n\u1ed9i b\u1ed9 kh\u00e1c nhau.<\/li>\n<\/ul>\n

              8. L\u1edbp tr\u1eebu t\u01b0\u1ee3ng l\u00e0 g\u00ec v\u00e0 n\u00f3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n nh\u01b0 th\u1ebf n\u00e0o? \ud83d\udd75\ufe0f<\/h2>\n

              L\u1edbp tr\u1eebu t\u01b0\u1ee3ng kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c kh\u1edfi t\u1ea1o tr\u1ef1c ti\u1ebfp. N\u00f3 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t m\u1eabu cho c\u00e1c l\u1edbp kh\u00e1c.<\/p>\n

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              • V\u0103n b\u1ea3n:<\/strong>T\u00ean l\u1edbp th\u01b0\u1eddng \u0111\u01b0\u1ee3c vi\u1ebft nghi\u00eang.<\/li>\n
              • R\u00e0ng bu\u1ed9c:<\/strong>N\u00f3 c\u00f3 th\u1ec3 ch\u1ee9a c\u00e1c ph\u01b0\u01a1ng th\u1ee9c tr\u1eebu t\u01b0\u1ee3ng (c\u00e1c ph\u01b0\u01a1ng th\u1ee9c kh\u00f4ng c\u00f3 th\u00e2n) m\u00e0 c\u00e1c l\u1edbp con ph\u1ea3i tri\u1ec3n khai.<\/li>\n
              • S\u1eed d\u1ee5ng:<\/strong>R\u1ea5t h\u1eefu \u00edch khi \u0111\u1ecbnh ngh\u0129a ch\u1ee9c n\u0103ng chung cho m\u1ed9t nh\u00f3m \u0111\u1ed1i t\u01b0\u1ee3ng li\u00ean quan.<\/li>\n<\/ul>\n

                9. B\u1ed9i s\u1ed1 l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao n\u00f3 quan tr\u1ecdng? \ud83d\udd22<\/h2>\n

                B\u1ed9i s\u1ed1 x\u00e1c \u0111\u1ecbnh c\u00f3 bao nhi\u00eau th\u1ec3 hi\u1ec7n c\u1ee7a m\u1ed9t l\u1edbp tham gia v\u00e0o m\u1ed9t m\u1ed1i quan h\u1ec7. N\u00f3 gi\u00fap ng\u0103n ng\u1eeba s\u1ef1 m\u01a1 h\u1ed3 trong thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng.<\/p>\n

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                • 1:<\/strong>Ch\u00ednh x\u00e1c m\u1ed9t th\u1ec3 hi\u1ec7n.<\/li>\n
                • 0..1:<\/strong>Kh\u00f4ng ho\u1eb7c m\u1ed9t th\u1ec3 hi\u1ec7n (t\u00f9y ch\u1ecdn).<\/li>\n
                • 1..*:<\/strong>M\u1ed9t ho\u1eb7c nhi\u1ec1u th\u1ec3 hi\u1ec7n.<\/li>\n
                • 0..*:<\/strong>Kh\u00f4ng ho\u1eb7c nhi\u1ec1u th\u1ec3 hi\u1ec7n (t\u1eadp h\u1ee3p t\u00f9y ch\u1ecdn).<\/li>\n<\/ul>\n

                  10. S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ph\u1ee5 thu\u1ed9c v\u00e0 li\u00ean k\u1ebft l\u00e0 g\u00ec? \ud83d\udd17<\/h2>\n

                  H\u1ecdc sinh th\u01b0\u1eddng nh\u1ea7m l\u1eabn hai m\u1ed1i quan h\u1ec7 c\u1ea5u tr\u00fac n\u00e0y.<\/p>\n

                    \n
                  • Li\u00ean k\u1ebft:<\/strong>M\u1ed1i quan h\u1ec7 m\u1ea1nh h\u01a1n n\u01a1i c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng bi\u1ebft \u0111\u1ebfn nhau. Th\u01b0\u1eddng l\u00e0 hai chi\u1ec1u.<\/li>\n
                  • Ph\u1ee5 thu\u1ed9c:<\/strong>M\u1ed1i quan h\u1ec7 y\u1ebfu h\u01a1n. M\u1ed9t l\u1edbp s\u1eed d\u1ee5ng l\u1edbp kh\u00e1c t\u1ea1m th\u1eddi (v\u00ed d\u1ee5: nh\u01b0 tham s\u1ed1). N\u1ebfu l\u1edbp kia thay \u0111\u1ed5i, l\u1edbp ph\u1ee5 thu\u1ed9c c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng.<\/li>\n
                  • K\u00fd hi\u1ec7u:<\/strong>M\u1ed1i quan h\u1ec7 ph\u1ee5 thu\u1ed9c l\u00e0 m\u1ed9t \u0111\u01b0\u1eddng n\u00e9t \u0111\u1ee9t c\u00f3 m\u0169i t\u00ean m\u1edf h\u01b0\u1edbng v\u1ec1 l\u1edbp \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/li>\n<\/ul>\n

                    11. B\u1ea1n x\u1eed l\u00fd c\u00e1c thu\u1ed9c t\u00ednh c\u00f3 ki\u1ec3u d\u1eef li\u1ec7u nh\u01b0 th\u1ebf n\u00e0o? \ud83e\uddee<\/h2>\n

                    C\u00e1c thu\u1ed9c t\u00ednh n\u00ean bao g\u1ed3m ki\u1ec3u d\u1eef li\u1ec7u c\u1ee7a ch\u00fang \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n ki\u1ec3u d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh tri\u1ec3n khai.<\/p>\n

                      \n
                    • \u0110\u1ecbnh d\u1ea1ng:<\/strong>\u0111\u1ed9 hi\u1ec3n th\u1ecb t\u00ean : ki\u1ec3uD\u1eefLi\u1ec7u<\/li>\n
                    • V\u00ed d\u1ee5:<\/strong> - tu\u1ed5i : int<\/code> ho\u1eb7c + t\u00ean : String<\/code><\/li>\n
                    • L\u1ee3i \u00edch:<\/strong>L\u00e0m r\u00f5 \u0111\u1ecbnh d\u1ea1ng \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra mong \u0111\u1ee3i cho c\u00e1c bi\u1ebfn.<\/li>\n<\/ul>\n

                      12. L\u1edbp c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u cha kh\u00f4ng? \ud83d\udd04<\/h2>\n

                      \u0110i\u1ec1u n\u00e0y li\u00ean quan \u0111\u1ebfn m\u00f4 h\u00ecnh k\u1ebf th\u1eeba c\u1ee7a ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh.<\/p>\n

                        \n
                      • K\u1ebf th\u1eeba \u0111\u01a1n:<\/strong> M\u1ed9t l\u1edbp k\u1ebf th\u1eeba t\u1eeb ch\u1ec9 m\u1ed9t cha. Ph\u1ed5 bi\u1ebfn trong Java v\u00e0 C#.<\/li>\n
                      • K\u1ebf th\u1eeba \u0111a:<\/strong> M\u1ed9t l\u1edbp k\u1ebf th\u1eeba t\u1eeb nhi\u1ec1u cha. Ph\u1ed5 bi\u1ebfn trong C++. S\u01a1 \u0111\u1ed3 l\u1edbp c\u00f3 th\u1ec3 th\u1ec3 hi\u1ec7n \u0111i\u1ec1u n\u00e0y, nh\u01b0ng m\u00e3 n\u1ec1n t\u1ea3ng ph\u1ea3i h\u1ed7 tr\u1ee3 n\u00f3.<\/li>\n
                      • Mixins:<\/strong> M\u1ed9t gi\u1ea3i ph\u00e1p thay th\u1ebf trong m\u1ed9t s\u1ed1 ng\u00f4n ng\u1eef \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u \u1ee9ng t\u01b0\u01a1ng t\u1ef1 m\u00e0 kh\u00f4ng c\u1ea7n k\u1ebf th\u1eeba \u0111a th\u1ef1c s\u1ef1.<\/li>\n<\/ul>\n

                        13. C\u00e1c t\u00ean vai tr\u00f2 trong m\u1ed1i quan h\u1ec7 l\u00e0 g\u00ec? \ud83c\udff7\ufe0f<\/h2>\n

                        C\u00e1c t\u00ean vai tr\u00f2 m\u00f4 t\u1ea3 ch\u1ee9c n\u0103ng m\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00f3ng trong m\u1ed9t m\u1ed1i quan h\u1ec7 c\u1ee5 th\u1ec3.<\/p>\n

                          \n
                        • R\u00f5 r\u00e0ng:<\/strong> Trong m\u1ed1i quan h\u1ec7 gi\u1eefa m\u1ed9t L\u00e1i xe<\/code> v\u00e0 m\u1ed9t Xe h\u01a1i<\/code>, vai tr\u00f2 c\u1ee7a ng\u01b0\u1eddi l\u00e1i c\u00f3 th\u1ec3 l\u00e0 \u201cng\u01b0\u1eddi v\u1eadn h\u00e0nh\u201d.<\/li>\n
                        • D\u1ec5 \u0111\u1ecdc:<\/strong> Ch\u00fang l\u00e0m cho s\u01a1 \u0111\u1ed3 d\u1ec5 \u0111\u1ecdc h\u01a1n \u0111\u1ed1i v\u1edbi con ng\u01b0\u1eddi, ch\u1ee9 kh\u00f4ng ch\u1ec9 m\u00e1y m\u00f3c.<\/li>\n
                        • V\u1ecb tr\u00ed:<\/strong>Vi\u1ebft g\u1ea7n \u0111\u01b0\u1eddng n\u1ed1i gi\u1eefa c\u00e1c l\u1edbp.<\/li>\n<\/ul>\n

                          14. B\u1ea1n bi\u1ec3u di\u1ec5n c\u00e1c th\u00e0nh vi\u00ean t\u0129nh nh\u01b0 th\u1ebf n\u00e0o? \ud83c\udfdb\ufe0f<\/h2>\n

                          C\u00e1c th\u00e0nh vi\u00ean t\u0129nh thu\u1ed9c v\u1ec1 l\u1edbp ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u00e1c th\u1ec3 hi\u1ec7n c\u1ee7a l\u1edbp.<\/p>\n

                            \n
                          • G\u1ea1ch ch\u00e2n:<\/strong>Trong UML, c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c t\u0129nh \u0111\u01b0\u1ee3c g\u1ea1ch ch\u00e2n.<\/li>\n
                          • S\u1eed d\u1ee5ng:<\/strong>D\u00f9ng cho c\u00e1c h\u1eb1ng s\u1ed1 ho\u1eb7c t\u00e0i nguy\u00ean chung kh\u00f4ng thay \u0111\u1ed5i theo t\u1eebng th\u1ec3 hi\u1ec7n.<\/li>\n
                          • V\u00ed d\u1ee5:<\/strong> M\u1ed9t Math<\/code> l\u1edbp c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c t\u0129nh PI<\/code>.<\/li>\n<\/ul>\n

                            15. Khi n\u00e0o b\u1ea1n n\u00ean t\u1ea1o s\u01a1 \u0111\u1ed3 l\u1edbp m\u1edbi? \ud83d\udcc5<\/h2>\n

                            Th\u1eddi \u0111i\u1ec3m r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi vi\u1ec7c m\u00f4 h\u00ecnh h\u00f3a hi\u1ec7u qu\u1ea3.<\/p>\n

                              \n
                            • Giai \u0111o\u1ea1n thi\u1ebft k\u1ebf:<\/strong> Tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u l\u1eadp tr\u00ecnh \u0111\u1ec3 l\u00ean k\u1ebf ho\u1ea1ch c\u1ea5u tr\u00fac.<\/li>\n
                            • T\u00e1i c\u1ea5u tr\u00fac:<\/strong> Khi m\u00e3 ngu\u1ed3n hi\u1ec7n t\u1ea1i l\u1ed9n x\u1ed9n v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp l\u1ea1i.<\/li>\n
                            • Chuy\u1ec3n giao c\u00f4ng vi\u1ec7c:<\/strong> Khi c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n m\u1edbi tham gia d\u1ef1 \u00e1n \u0111\u1ec3 hi\u1ec3u m\u00e3 ngu\u1ed3n.<\/li>\n
                            • T\u00e0i li\u1ec7u:<\/strong> D\u00f9ng cho c\u00e1c bu\u1ed5i tr\u00ecnh b\u00e0y v\u1edbi kh\u00e1ch h\u00e0ng \u0111\u1ec3 minh h\u1ecda ph\u1ea1m vi h\u1ec7 th\u1ed1ng.<\/li>\n<\/ul>\n

                              16. S\u01a1 \u0111\u1ed3 l\u1edbp kh\u00e1c s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 nh\u01b0 th\u1ebf n\u00e0o? \ud83d\udcc9<\/h2>\n

                              Hi\u1ec3u \u0111\u01b0\u1ee3c s\u1ef1 kh\u00e1c bi\u1ec7t gi\u00fap tr\u00e1nh sai s\u00f3t trong m\u00f4 h\u00ecnh h\u00f3a.<\/p>\n\n\n\n\n\n
                              T\u00ednh n\u0103ng<\/th>\nS\u01a1 \u0111\u1ed3 l\u1edbp<\/th>\nS\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1<\/th>\n<\/tr>\n
                              Tr\u1ecdng t\u00e2m<\/td>\nC\u1ea5u tr\u00fac v\u00e0 Tr\u1ea1ng th\u00e1i<\/td>\nH\u00e0nh vi v\u00e0 T\u01b0\u01a1ng t\u00e1c<\/td>\n<\/tr>\n
                              Th\u1eddi gian<\/td>\nT\u0129nh<\/td>\n\u0110\u1ed9ng (theo th\u1eddi gian)<\/td>\n<\/tr>\n
                              C\u00e2u h\u1ecfi<\/td>\nH\u1ec7 th\u1ed1ng tr\u00f4ng nh\u01b0 th\u1ebf n\u00e0o?<\/td>\nH\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/td>\n<\/tr>\n<\/table>\n

                              17. B\u1ea1n qu\u1ea3n l\u00fd h\u1ec7 th\u1ed1ng l\u1edbn v\u1edbi nhi\u1ec1u l\u1edbp nh\u01b0 th\u1ebf n\u00e0o? \ud83d\uddc2\ufe0f<\/h2>\n

                              C\u00e1c d\u1ef1 \u00e1n l\u1edbn \u0111\u00f2i h\u1ecfi s\u1ef1 t\u1ed5 ch\u1ee9c \u0111\u1ec3 tr\u00e1nh l\u1ed9n x\u1ed9n.<\/p>\n

                                \n
                              • S\u01a1 \u0111\u1ed3 G\u00f3i:<\/strong>Nh\u00f3m c\u00e1c l\u1edbp v\u00e0o c\u00e1c g\u00f3i ho\u1eb7c kh\u00f4ng gian t\u00ean.<\/li>\n
                              • C\u00e1c h\u1ec7 th\u1ed1ng con:<\/strong>Chia h\u1ec7 th\u1ed1ng th\u00e0nh c\u00e1c m\u00f4-\u0111un h\u1ee3p l\u00fd.<\/li>\n
                              • Giao di\u1ec7n:<\/strong>S\u1eed d\u1ee5ng giao di\u1ec7n \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ranh gi\u1edbi gi\u1eefa c\u00e1c h\u1ec7 th\u1ed1ng con.<\/li>\n
                              • T\u00e1ch r\u1eddi:<\/strong>T\u1ed1i thi\u1ec3u h\u00f3a c\u00e1c ph\u1ee5 thu\u1ed9c tr\u1ef1c ti\u1ebfp gi\u1eefa c\u00e1c g\u00f3i c\u00e1ch xa nhau.<\/li>\n<\/ul>\n

                                18. Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn m\u00e0 sinh vi\u00ean th\u01b0\u1eddng m\u1eafc ph\u1ea3i l\u00e0 g\u00ec? \ud83d\udeab<\/h2>\n

                                Tr\u00e1nh nh\u1eefng sai l\u1ea7m n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng chuy\u00ean nghi\u1ec7p.<\/p>\n

                                  \n
                                • Qu\u00e1 nhi\u1ec1u chi ti\u1ebft:<\/strong>Vi\u1ec7c bao g\u1ed3m m\u1ecdi ph\u01b0\u01a1ng th\u1ee9c ri\u00eang l\u1ebb c\u00f3 th\u1ec3 l\u00e0m r\u1ed1i s\u01a1 \u0111\u1ed3. H\u00e3y t\u1eadp trung v\u00e0o ki\u1ebfn tr\u00fac c\u1ea5p cao.<\/li>\n
                                • B\u1ecf qua c\u00e1c m\u1ed1i quan h\u1ec7:<\/strong>V\u1ebd c\u00e1c l\u1edbp m\u00e0 kh\u00f4ng k\u1ebft n\u1ed1i ch\u00fang s\u1ebd b\u1ecf qua m\u1ee5c \u0111\u00edch c\u1ee7a h\u1ec7 th\u1ed1ng.<\/li>\n
                                • T\u00ean g\u1ecdi kh\u00f4ng nh\u1ea5t qu\u00e1n:<\/strong>S\u1eed d\u1ee5ng c\u00e1c quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean kh\u00e1c nhau khi\u1ebfn s\u01a1 \u0111\u1ed3 kh\u00f3 \u0111\u1ecdc.<\/li>\n
                                • Nh\u1ea7m l\u1eabn gi\u1eefa thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c:<\/strong>\u0110\u1ea3m b\u1ea3o d\u1eef li\u1ec7u n\u1eb1m \u1edf ph\u1ea7n gi\u1eefa v\u00e0 logic n\u1eb1m \u1edf ph\u1ea7n d\u01b0\u1edbi.<\/li>\n<\/ul>\n

                                  19. B\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o s\u01a1 \u0111\u1ed3 l\u1edbp m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng kh\u00f4ng? \ud83d\udcdd<\/h2>\n

                                  M\u1eb7c d\u00f9 c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3, nh\u01b0ng kh\u00e1i ni\u1ec7m n\u00e0y l\u00e0 ph\u1ed5 qu\u00e1t.<\/p>\n

                                    \n
                                  • B\u00fat v\u00e0 gi\u1ea5y:<\/strong>R\u1ea5t t\u1ed1t cho c\u00e1c bu\u1ed5i th\u1ea3o lu\u1eadn \u00fd t\u01b0\u1edfng ban \u0111\u1ea7u.<\/li>\n
                                  • B\u1ea3ng tr\u1eafng:<\/strong>R\u1ea5t t\u1ed1t cho c\u00e1c bu\u1ed5i h\u1ecdp nh\u00f3m h\u1ee3p t\u00e1c.<\/li>\n
                                  • Tr\u00ecnh so\u1ea1n th\u1ea3o v\u0103n b\u1ea3n:<\/strong>M\u1ed9t s\u1ed1 nh\u00e0 ph\u00e1t tri\u1ec3n s\u1eed d\u1ee5ng ch\u00fa th\u00edch m\u00e3 \u0111\u1ec3 m\u00f4 t\u1ea3 c\u1ea5u tr\u00fac tr\u01b0\u1edbc khi v\u1ebd.<\/li>\n
                                  • C\u00f4ng c\u1ee5 chung:<\/strong>B\u1ea5t k\u1ef3 c\u00f4ng c\u1ee5 v\u1ebd s\u01a1 \u0111\u1ed3 n\u00e0o h\u1ed7 tr\u1ee3 \u0111\u01b0\u1eddng n\u00e9t v\u00e0 h\u00ecnh d\u1ea1ng \u0111\u1ec1u \u0111\u1ee7 \u0111\u1ec3 t\u1ea1o b\u1ea3n ph\u00e1c th\u1ea3o c\u01a1 b\u1ea3n.<\/li>\n<\/ul>\n

                                    20. Ki\u1ebfn th\u1ee9c n\u00e0y gi\u00fap \u00edch th\u1ebf n\u00e0o cho s\u1ef1 nghi\u1ec7p c\u1ee7a b\u1ea1n? \ud83d\udcbc<\/h2>\n

                                    K\u1ef9 n\u0103ng th\u00e0nh th\u1ea1o m\u00f4 h\u00ecnh h\u00f3a h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cao trong ng\u00e0nh.<\/p>\n

                                      \n
                                    • Giao ti\u1ebfp:<\/strong>Cho ph\u00e9p b\u1ea1n gi\u1ea3i th\u00edch c\u00e1c \u00fd t\u01b0\u1edfng ph\u1ee9c t\u1ea1p cho c\u00e1c b\u00ean li\u00ean quan m\u00e0 kh\u00f4ng c\u1ea7n vi\u1ebft m\u00e3.<\/li>\n
                                    • L\u00ean k\u1ebf ho\u1ea1ch:<\/strong>Gi\u1ea3m l\u1ed7i b\u1eb1ng c\u00e1ch ph\u00e1t hi\u1ec7n c\u00e1c khi\u1ebfm khuy\u1ebft trong thi\u1ebft k\u1ebf tr\u01b0\u1edbc khi tri\u1ec3n khai.<\/li>\n
                                    • B\u1ea3o tr\u00ec:<\/strong>L\u00e0m cho m\u00e3 ngu\u1ed3n c\u0169 d\u1ec5 hi\u1ec3u v\u00e0 d\u1ec5 s\u1eeda \u0111\u1ed5i h\u01a1n.<\/li>\n
                                    • Ti\u00eau chu\u1ea9n:<\/strong>Th\u1ec3 hi\u1ec7n s\u1ef1 quen thu\u1ed9c v\u1edbi c\u00e1c th\u1ef1c h\u00e0nh ti\u00eau chu\u1ea9n ng\u00e0nh nh\u01b0 UML.<\/li>\n<\/ul>\n

                                      T\u00f3m t\u1eaft c\u00e1c kh\u00e1i ni\u1ec7m ch\u00ednh \ud83d\udcdd<\/h2>\n

                                      \u0110\u1ec3 k\u1ebft lu\u1eadn, th\u00e0nh th\u1ea1o s\u01a1 \u0111\u1ed3 l\u1edbp \u0111\u00f2i h\u1ecfi hi\u1ec3u r\u00f5 c\u1ea5u tr\u00fac t\u0129nh c\u1ee7a ph\u1ea7n m\u1ec1m. \u0110i\u1ec1u n\u00e0y \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c v\u1ec1:<\/p>\n

                                        \n
                                      • Bao \u0111\u00f3ng:<\/strong>Che gi\u1ea5u c\u00e1c chi ti\u1ebft b\u00ean trong b\u1eb1ng c\u00e1c b\u1ed9 ph\u1eadn truy c\u1eadp.<\/li>\n
                                      • K\u1ebf th\u1eeba:<\/strong>T\u1ea1o c\u00e1c c\u1ea5p \u0111\u1ed9 ph\u00e2n c\u1ea5p \u0111\u1ec3 gi\u1ea3m s\u1ef1 tr\u00f9ng l\u1eb7p.<\/li>\n
                                      • M\u1ed1i quan h\u1ec7:<\/strong>X\u00e1c \u0111\u1ecbnh c\u00e1ch c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau (Li\u00ean k\u1ebft, T\u00edch h\u1ee3p, K\u1ebft h\u1ee3p).<\/li>\n
                                      • Tr\u1eebu t\u01b0\u1ee3ng h\u00f3a:<\/strong>S\u1eed d\u1ee5ng giao di\u1ec7n v\u00e0 l\u1edbp tr\u1eebu t\u01b0\u1ee3ng \u0111\u1ec3 \u0111\u1ecbnh ngh\u0129a h\u1ee3p \u0111\u1ed3ng.<\/li>\n<\/ul>\n

                                        B\u1eb1ng c\u00e1ch n\u1eafm v\u1eefng 20 c\u00e2u h\u1ecfi n\u00e0y, sinh vi\u00ean s\u1ebd x\u00e2y d\u1ef1ng n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc cho ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m. Ki\u1ebfn th\u1ee9c n\u00e0y \u0111\u01b0\u1ee3c chuy\u1ec3n h\u00f3a tr\u1ef1c ti\u1ebfp th\u00e0nh vi\u1ec7c vi\u1ebft m\u00e3 s\u1ea1ch h\u01a1n, d\u1ec5 b\u1ea3o tr\u00ec h\u01a1n. H\u00e3y nh\u1edb, s\u01a1 \u0111\u1ed3 l\u00e0 c\u00f4ng c\u1ee5 giao ti\u1ebfp tr\u01b0\u1edbc ti\u00ean v\u00e0 t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt th\u1ee9 hai.<\/p>\n","protected":false},"excerpt":{"rendered":"

                                        K\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o c\u00e1c m\u00f4 h\u00ecnh tr\u1ef1c quan \u0111\u1ec3 truy\u1ec1n \u0111\u1ea1t c\u1ea5u tr\u00fac h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p. Trong c\u00e1c chu\u1ea9n ng\u00f4n ng\u1eef m\u00f4 h\u00ecnh…<\/p>\n","protected":false},"author":1,"featured_media":1095,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"20 C\u00e2u h\u1ecfi v\u00e0 tr\u1ea3 l\u1eddi ph\u1ed5 bi\u1ebfn c\u1ee7a sinh vi\u00ean v\u1ec1 s\u01a1 \u0111\u1ed3 l\u1edbp trong k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m \ud83c\udf93","_yoast_wpseo_metadesc":"H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n tr\u1ea3 l\u1eddi 20 c\u00e2u h\u1ecfi h\u00e0ng \u0111\u1ea7u c\u1ee7a sinh vi\u00ean v\u1ec1 s\u01a1 \u0111\u1ed3 l\u1edbp UML, c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 vai tr\u00f2 c\u1ee7a ch\u00fang trong ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m. H\u1ecdc thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng ngay h\u00f4m nay.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[13],"tags":[43,45],"class_list":["post-1094","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uml","tag-academic","tag-class-diagram"],"yoast_head":"\n20 C\u00e2u h\u1ecfi v\u00e0 tr\u1ea3 l\u1eddi ph\u1ed5 bi\u1ebfn c\u1ee7a sinh vi\u00ean v\u1ec1 s\u01a1 \u0111\u1ed3 l\u1edbp trong k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m \ud83c\udf93<\/title>\n<meta name=\"description\" content=\"H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n tr\u1ea3 l\u1eddi 20 c\u00e2u h\u1ecfi h\u00e0ng \u0111\u1ea7u c\u1ee7a sinh vi\u00ean v\u1ec1 s\u01a1 \u0111\u1ed3 l\u1edbp UML, c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 vai tr\u00f2 c\u1ee7a ch\u00fang trong ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m. H\u1ecdc thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng ngay h\u00f4m nay.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.method-post.com\/vi\/top-20-student-questions-class-diagrams-software-engineering\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"20 C\u00e2u h\u1ecfi v\u00e0 tr\u1ea3 l\u1eddi ph\u1ed5 bi\u1ebfn c\u1ee7a sinh vi\u00ean v\u1ec1 s\u01a1 \u0111\u1ed3 l\u1edbp trong k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m \ud83c\udf93\" \/>\n<meta property=\"og:description\" content=\"H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n tr\u1ea3 l\u1eddi 20 c\u00e2u h\u1ecfi h\u00e0ng \u0111\u1ea7u c\u1ee7a sinh vi\u00ean v\u1ec1 s\u01a1 \u0111\u1ed3 l\u1edbp UML, c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 vai tr\u00f2 c\u1ee7a ch\u00fang trong ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m. 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