{"id":1806,"date":"2026-04-05T17:57:49","date_gmt":"2026-04-05T17:57:49","guid":{"rendered":"https:\/\/www.ez-knowledge.com\/vi\/common-uml-sequence-diagram-mistakes-fixes\/"},"modified":"2026-04-05T17:57:49","modified_gmt":"2026-04-05T17:57:49","slug":"common-uml-sequence-diagram-mistakes-fixes","status":"publish","type":"post","link":"https:\/\/www.ez-knowledge.com\/vi\/common-uml-sequence-diagram-mistakes-fixes\/","title":{"rendered":"Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 UML v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c ch\u00fang"},"content":{"rendered":"

Vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 UML l\u00e0 k\u1ef9 n\u0103ng thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 ph\u1ea7n m\u1ec1m v\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n. Nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y tr\u1ef1c quan h\u00f3a s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng theo th\u1eddi gian. Ch\u00fang \u0111\u00f3ng vai tr\u00f2 nh\u01b0 b\u1ea3n v\u1ebd thi\u1ebft k\u1ebf cho h\u00e0nh vi h\u1ec7 th\u1ed1ng, gi\u00fap c\u00e1c nh\u00f3m hi\u1ec3u r\u00f5 lu\u1ed3ng d\u1eef li\u1ec7u v\u00e0 c\u00e1ch c\u00e1c th\u00e0nh ph\u1ea7n ph\u1ed1i h\u1ee3p v\u1edbi nhau. Tuy nhi\u00ean, ngay c\u1ea3 nh\u1eefng ng\u01b0\u1eddi c\u00f3 kinh nghi\u1ec7m c\u0169ng th\u01b0\u1eddng m\u1eafc ph\u1ea3i nh\u1eefng l\u1ed7i tinh vi c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn hi\u1ec3u nh\u1ea7m trong qu\u00e1 tr\u00ecnh tri\u1ec3n khai.<\/p>\n

M\u1ed9t s\u01a1 \u0111\u1ed3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng t\u1ed1t s\u1ebd gi\u1ea3m thi\u1ec3u s\u1ef1 m\u01a1 h\u1ed3. N\u00f3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ecdi ng\u01b0\u1eddi, t\u1eeb k\u1ef9 s\u01b0 backend \u0111\u1ebfn nh\u00e0 ph\u00e1t tri\u1ec3n frontend, \u0111\u1ec1u chia s\u1ebb c\u00f9ng m\u1ed9t m\u00f4 h\u00ecnh t\u01b0 duy. Khi s\u01a1 \u0111\u1ed3 ch\u1ee9a sai s\u00f3t, nguy c\u01a1 l\u1ed7i s\u1ebd t\u0103ng l\u00ean v\u00e0 th\u1eddi gian ph\u00e1t tri\u1ec3n k\u00e9o d\u00e0i. H\u01b0\u1edbng d\u1eabn n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong vi\u1ec7c v\u1ebd s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 v\u00e0 cung c\u1ea5p c\u00e1c bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c c\u1ee5 th\u1ec3. Ch\u00fang ta s\u1ebd xem x\u00e9t c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng, lo\u1ea1i tin nh\u1eafn, thanh k\u00edch ho\u1ea1t v\u00e0 c\u00e1c \u0111o\u1ea1n t\u01b0\u01a1ng t\u00e1c. B\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y, b\u1ea1n \u0111\u1ea3m b\u1ea3o t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt c\u1ee7a m\u00ecnh lu\u00f4n r\u00f5 r\u00e0ng v\u00e0 \u0111\u00e1ng tin c\u1eady.<\/p>\n

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\"Chalkboard-style<\/figure>\n<\/div>\n

1. L\u1ed7i \u0111\u01b0\u1eddng s\u1ed1ng: Ph\u1ea1m vi v\u00e0 v\u00f4 hi\u1ec7u h\u00f3a \ud83d\udcc9<\/h2>\n

\u0110\u01b0\u1eddng s\u1ed1ng \u0111\u1ea1i di\u1ec7n cho m\u1ed9t th\u00e0nh vi\u00ean tham gia t\u01b0\u01a1ng t\u00e1c. \u0110\u00f3 l\u00e0 m\u1ed9t \u0111\u01b0\u1eddng n\u00e9t \u0111\u1ee9t \u0111\u1ee9ng, k\u00e9o d\u00e0i t\u1eeb \u0111\u1ec9nh \u0111\u1ebfn \u0111\u00e1y s\u01a1 \u0111\u1ed3. Nh\u1eefng l\u1ed7i \u1edf \u0111\u00e2y th\u01b0\u1eddng xu\u1ea5t ph\u00e1t t\u1eeb vi\u1ec7c hi\u1ec3u nh\u1ea7m khi n\u00e0o \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang ho\u1ea1t \u0111\u1ed9ng v\u00e0 khi n\u00e0o \u0111ang ch\u1edd \u0111\u1ee3i.<\/p>\n

\u274c Sai l\u1ea7m: Thi\u1ebfu thanh v\u00f4 hi\u1ec7u h\u00f3a<\/h3>\n

Nhi\u1ec1u s\u01a1 \u0111\u1ed3 th\u1ec3 hi\u1ec7n m\u1ed9t \u0111\u01b0\u1eddng li\u00ean t\u1ee5c t\u1eeb tr\u00ean xu\u1ed1ng d\u01b0\u1edbi m\u00e0 kh\u00f4ng c\u00f3 ng\u1eaft qu\u00e3ng. \u0110i\u1ec1u n\u00e0y ng\u1ee5 \u00fd r\u1eb1ng \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang ho\u1ea1t \u0111\u1ed9ng su\u1ed1t to\u00e0n b\u1ed9 chu\u1ed7i th\u1eddi gian. Tr\u00ean th\u1ef1c t\u1ebf, c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng ch\u1edd tin nh\u1eafn v\u00e0 x\u1eed l\u00fd ch\u00fang trong th\u1eddi gian ng\u1eafn tr\u01b0\u1edbc khi quay tr\u1edf v\u1ec1 tr\u1ea1ng th\u00e1i ch\u1edd.<\/p>\n

    \n
  • T\u00e1c \u0111\u1ed9ng:<\/strong>Ng\u01b0\u1eddi \u0111\u1ecdc cho r\u1eb1ng \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang th\u1ef1c hi\u1ec7n c\u00e1c t\u00e1c v\u1ee5 n\u1ec1n li\u00ean t\u1ee5c, \u0111i\u1ec1u n\u00e0y hi\u1ebfm khi \u0111\u00fang.<\/li>\n
  • T\u00e1c \u0111\u1ed9ng:<\/strong>Vi\u1ec7c x\u00e1c \u0111\u1ecbnh th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3 m\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang b\u1eadn r\u1ed9n x\u1eed l\u00fd logic tr\u1edf n\u00ean kh\u00f3 kh\u0103n.<\/li>\n<\/ul>\n

    \u2705 C\u00e1ch kh\u1eafc ph\u1ee5c: S\u1eed d\u1ee5ng thanh k\u00edch ho\u1ea1t<\/h3>\n

    Ch\u00e8n m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt m\u1ecfng tr\u00ean \u0111\u01b0\u1eddng s\u1ed1ng m\u1ed7i khi \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang x\u1eed l\u00fd m\u1ed9t tin nh\u1eafn. \u0110\u00e2y ch\u00ednh l\u00e0 \u201c\u0111i\u1ec3m ki\u1ec3m so\u00e1t t\u1eadp trung\u201d.<\/p>\n

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    • \u0110i\u1ec3m b\u1eaft \u0111\u1ea7u:<\/strong>\u0110\u1ea7u tr\u00ean c\u1ee7a thanh tr\u00f9ng v\u1edbi \u0111\u1ea7u m\u0169i t\u00ean c\u1ee7a tin nh\u1eafn \u0111\u1ebfn.<\/li>\n
    • \u0110i\u1ec3m k\u1ebft th\u00fac:<\/strong>\u0110\u1ea7u d\u01b0\u1edbi c\u1ee7a thanh tr\u00f9ng v\u1edbi \u0111\u1ea7u m\u0169i t\u00ean c\u1ee7a tin nh\u1eafn \u0111i ra ho\u1eb7c \u0111i\u1ec3m k\u1ebft th\u00fac c\u1ee7a thao t\u00e1c.<\/li>\n
    • Tr\u1ea1ng th\u00e1i ch\u1edd:<\/strong>Khi kh\u00f4ng c\u00f3 thanh k\u00edch ho\u1ea1t n\u00e0o, \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang \u1edf tr\u1ea1ng th\u00e1i th\u1ee5 \u0111\u1ed9ng.<\/li>\n<\/ul>\n

      \u274c Sai l\u1ea7m: C\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng ch\u1ed3ng ch\u00e9o nhau<\/h3>\n

      Vi\u1ec7c \u0111\u1eb7t c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng qu\u00e1 g\u1ea7n nhau s\u1ebd t\u1ea1o ra s\u1ef1 l\u1ed9n x\u1ed9n v\u1ec1 m\u1eb7t th\u1ecb gi\u00e1c. \u0110\u1ed3ng th\u1eddi c\u0169ng khi\u1ebfn vi\u1ec7c theo d\u00f5i tin nh\u1eafn n\u00e0o thu\u1ed9c v\u1ec1 \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0o tr\u1edf n\u00ean kh\u00f3 kh\u0103n.<\/p>\n

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      • C\u00e1ch kh\u1eafc ph\u1ee5c:<\/strong>Duy tr\u00ec kho\u1ea3ng c\u00e1ch ngang nh\u1ea5t qu\u00e1n gi\u1eefa c\u00e1c th\u00e0nh vi\u00ean tham gia. N\u1ebfu s\u01a1 \u0111\u1ed3 qu\u00e1 r\u1ed9ng, h\u00e3y c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng nhi\u1ec1u khung ho\u1eb7c chia t\u00e1ch t\u01b0\u01a1ng t\u00e1c m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd.<\/li>\n<\/ul>\n

        2. Nh\u1ea7m l\u1eabn lu\u1ed3ng tin nh\u1eafn: H\u01b0\u1edbng v\u00e0 lo\u1ea1i \ud83d\udcec<\/h2>\n

        C\u00e1c tin nh\u1eafn \u0111\u1ea1i di\u1ec7n cho s\u1ef1 giao ti\u1ebfp gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng. Ki\u1ec3u m\u0169i t\u00ean cho bi\u1ebft b\u1ea3n ch\u1ea5t c\u1ee7a cu\u1ed9c g\u1ecdi. C\u00e1c ki\u1ec3u m\u0169i t\u00ean sai s\u1ebd thay \u0111\u1ed5i \u00fd ngh\u0129a c\u1ee7a t\u01b0\u01a1ng t\u00e1c.<\/p>\n

        \u274c Sai l\u1ea7m: Nh\u1ea7m l\u1eabn gi\u1eefa c\u00e1c cu\u1ed9c g\u1ecdi \u0111\u1ed3ng b\u1ed9 v\u00e0 b\u1ea5t \u0111\u1ed3ng b\u1ed9<\/h3>\n

        C\u00e1c cu\u1ed9c g\u1ecdi \u0111\u1ed3ng b\u1ed9 (\u0111\u01b0\u1eddng li\u1ec1n, \u0111\u1ea7u m\u0169i t\u00ean \u0111\u1ea7y) s\u1ebd ch\u1eb7n ng\u01b0\u1eddi g\u1eedi cho \u0111\u1ebfn khi nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i. C\u00e1c cu\u1ed9c g\u1ecdi b\u1ea5t \u0111\u1ed3ng b\u1ed9 (\u0111\u01b0\u1eddng li\u1ec1n, \u0111\u1ea7u m\u0169i t\u00ean tr\u1ed1ng) kh\u00f4ng ch\u1eb7n ng\u01b0\u1eddi g\u1eedi.<\/p>\n

          \n
        • L\u1ed7i ph\u1ed5 bi\u1ebfn:<\/strong>S\u1eed d\u1ee5ng m\u0169i t\u00ean \u0111\u1ea7y cho c\u00e1c t\u00e1c v\u1ee5 n\u1ec1n nh\u01b0 ghi nh\u1eadt k\u00fd ho\u1eb7c th\u00f4ng b\u00e1o.<\/li>\n
        • H\u1eadu qu\u1ea3:<\/strong> C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n c\u00f3 th\u1ec3 tri\u1ec3n khai logic ch\u1eb7n khi logic kh\u00f4ng ch\u1eb7n l\u00e0 c\u1ea7n thi\u1ebft, g\u00e2y ra c\u00e1c \u0111i\u1ec3m ngh\u1ebdn hi\u1ec7u su\u1ea5t.<\/li>\n<\/ul>\n

          \u2705 Gi\u1ea3i ph\u00e1p: \u0110\u1ecbnh ngh\u0129a m\u0169i t\u00ean nghi\u00eam ng\u1eb7t<\/h3>\n

          X\u00e1c \u0111\u1ecbnh m\u1ed9t ti\u00eau chu\u1ea9n cho \u0111\u1ed9i c\u1ee7a b\u1ea1n v\u1ec1 ki\u1ec3u m\u0169i t\u00ean.<\/p>\n

            \n
          • G\u1ecdi \u0111\u1ed3ng b\u1ed9:<\/strong>\u0110\u01b0\u1eddng li\u1ec1n, tam gi\u00e1c \u0111\u1ea7y. D\u00f9ng cho c\u00e1c thao t\u00e1c y\u00eau c\u1ea7u gi\u00e1 tr\u1ecb tr\u1ea3 v\u1ec1 ngay l\u1eadp t\u1ee9c ho\u1eb7c thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i tr\u01b0\u1edbc khi ti\u1ebfp t\u1ee5c.<\/li>\n
          • G\u1ecdi b\u1ea5t \u0111\u1ed3ng b\u1ed9:<\/strong>\u0110\u01b0\u1eddng li\u1ec1n, tam gi\u00e1c h\u1edf. D\u00f9ng cho c\u00e1c t\u00e1c v\u1ee5 ki\u1ec3u g\u1eedi \u0111i r\u1ed3i qu\u00ean.<\/li>\n
          • Tin nh\u1eafn tr\u1ea3 v\u1ec1:<\/strong>\u0110\u01b0\u1eddng g\u1ea1ch \u0111\u1ee9t, \u0111\u1ea7u m\u0169i t\u00ean h\u1edf. Lu\u00f4n hi\u1ec3n th\u1ecb \u0111\u01b0\u1eddng tr\u1ea3 v\u1ec1 n\u1ebfu thao t\u00e1c t\u1ea1o ra d\u1eef li\u1ec7u. N\u1ebfu tr\u1ea3 v\u1ec1 r\u1ed7ng ho\u1eb7c ng\u1ea7m hi\u1ec3u, h\u00e3y b\u1ecf qua \u0111\u1ec3 gi\u1ea3m s\u1ef1 l\u1ed9n x\u1ed9n.<\/li>\n<\/ul>\n

            \u274c Sai l\u1ea7m: B\u1ecf qua tin nh\u1eafn tr\u1ea3 v\u1ec1<\/h3>\n

            M\u1ed9t s\u1ed1 s\u01a1 \u0111\u1ed3 ch\u1ec9 hi\u1ec3n th\u1ecb tin nh\u1eafn g\u1eedi \u0111i. \u0110i\u1ec1u n\u00e0y che gi\u1ea5u lu\u1ed3ng d\u1eef li\u1ec7u quay tr\u1edf l\u1ea1i ng\u01b0\u1eddi y\u00eau c\u1ea7u.<\/p>\n

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            • T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong>S\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 kh\u00f4ng ch\u1ec9 l\u00e0 lu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n; n\u00f3 l\u00e0 lu\u1ed3ng d\u1eef li\u1ec7u. Vi\u1ec7c b\u1ecf s\u00f3t c\u00e1c tin nh\u1eafn tr\u1ea3 v\u1ec1 l\u00e0m m\u1edd th\u00f4ng tin n\u00e0o \u0111\u01b0\u1ee3c cung c\u1ea5p \u1edf m\u1ed7i b\u01b0\u1edbc.<\/li>\n
            • S\u1eeda ch\u1eefa:<\/strong>V\u1ebd m\u0169i t\u00ean tr\u1ea3 v\u1ec1 cho m\u1ecdi thao t\u00e1c t\u1ea1o ra gi\u00e1 tr\u1ecb.<\/li>\n<\/ul>\n

              3. C\u00e1c kh\u1ed1i t\u01b0\u01a1ng t\u00e1c: Logic v\u00e0 to\u00e1n t\u1eed \ud83d\udd04<\/h2>\n

              p> C\u00e1c kh\u1ed1i k\u1ebft h\u1ee3p cho ph\u00e9p b\u1ea1n bi\u1ec3u di\u1ec5n logic ph\u1ee9c t\u1ea1p nh\u01b0 v\u00f2ng l\u1eb7p, \u0111i\u1ec1u ki\u1ec7n v\u00e0 c\u00e1c b\u01b0\u1edbc t\u00f9y ch\u1ecdn. S\u1eed d\u1ee5ng to\u00e1n t\u1eed sai l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y hi\u1ec3u l\u1ea7m.<\/p>\n

              \u274c Sai l\u1ea7m: S\u1eed d\u1ee5ng \u201calt\u201d cho v\u00f2ng l\u1eb7p<\/h3>\n

              Kh\u1ed1i alt<\/code> (t\u00f9y ch\u1ecdn) d\u00f9ng cho c\u00e1c l\u1ef1a ch\u1ecdn lo\u1ea1i tr\u1eeb nhau (N\u1ebfu\/Th\u00ec). Th\u01b0\u1eddng b\u1ecb nh\u1ea7m l\u1eabn d\u00f9ng \u0111\u1ec3 th\u1ec3 hi\u1ec7n v\u00f2ng l\u1eb7p.<\/p>\n

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              • L\u1ed7i:<\/strong>Hi\u1ec3n th\u1ecb c\u00f9ng m\u1ed9t kh\u1ed1i tin nh\u1eafn nhi\u1ec1u l\u1ea7n b\u00ean trong m\u1ed9t kh\u1ed1i alt<\/code> khung.<\/li>\n
              • H\u1eadu qu\u1ea3:<\/strong> N\u00f3 ng\u1ee5 \u00fd h\u1ec7 th\u1ed1ng nh\u00e1nh sang c\u00e1c tr\u1ea1ng th\u00e1i kh\u00e1c nhau, ch\u1ee9 kh\u00f4ng l\u1eb7p l\u1ea1i c\u00f9ng m\u1ed9t tr\u1ea1ng th\u00e1i.<\/li>\n<\/ul>\n

                \u2705 Gi\u1ea3i ph\u00e1p: To\u00e1n t\u1eed kh\u1ed1i \u0111\u00fang<\/h3>\n
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                • opt (T\u00f9y ch\u1ecdn):<\/strong>D\u00f9ng khi m\u1ed9t b\u01b0\u1edbc c\u00f3 th\u1ec3 ho\u00e0n to\u00e0n kh\u00f4ng x\u1ea3y ra. Ghi ch\u00fa r\u00f5 \u0111i\u1ec1u ki\u1ec7n (v\u00ed d\u1ee5: [Ng\u01b0\u1eddi d\u00f9ng l\u00e0 Qu\u1ea3n tr\u1ecb vi\u00ean]).<\/li>\n
                • alt (Thay th\u1ebf):<\/strong> S\u1eed d\u1ee5ng cho logic nh\u00e1nh. \u0110\u1ea3m b\u1ea3o c\u00e1c \u0111i\u1ec1u ki\u1ec7n bao ph\u1ee7 t\u1ea5t c\u1ea3 c\u00e1c kh\u1ea3 n\u0103ng n\u1ebfu \u0111\u00e2y l\u00e0 m\u1ed9t con \u0111\u01b0\u1eddng x\u00e1c \u0111\u1ecbnh.<\/li>\n
                • loop (L\u1eb7p l\u1ea1i):<\/strong> S\u1eed d\u1ee5ng khi m\u1ed9t qu\u00e1 tr\u00ecnh l\u1eb7p l\u1ea1i. Th\u00eam \u0111i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7 n\u1ebfu v\u00f2ng l\u1eb7p c\u00f3 gi\u1edbi h\u1ea1n (v\u00ed d\u1ee5: [khi m\u1ee5c t\u1ed3n t\u1ea1i]).<\/li>\n
                • par (Song song):<\/strong> S\u1eed d\u1ee5ng khi c\u00e1c tin nh\u1eafn x\u1ea3y ra \u0111\u1ed3ng th\u1eddi. \u0110i\u1ec1u n\u00e0y kh\u00e1c bi\u1ec7t v\u1edbi t\u00ednh \u0111\u1ed3ng th\u1eddi trong m\u00e3 ngu\u1ed3n nh\u01b0ng \u0111\u1ea1i di\u1ec7n cho s\u1ef1 ch\u1ed3ng l\u1ea5n v\u1ec1 m\u1eb7t logic theo th\u1eddi gian.<\/li>\n<\/ul>\n

                  \u274c Sai l\u1ea7m: C\u00e1c kh\u1ed1i l\u1ed3ng gh\u00e9p m\u00e0 kh\u00f4ng c\u00f3 gi\u1edbi h\u1ea1n<\/h3>\n

                  Vi\u1ec7c l\u1ed3ng gh\u00e9p s\u00e2u c\u00e1c khung khi\u1ebfn s\u01a1 \u0111\u1ed3 tr\u1edf n\u00ean kh\u00f3 \u0111\u1ecdc. M\u1ed9t v\u00f2ng l\u1eb7p b\u00ean trong m\u1ed9t v\u00f2ng l\u1eb7p b\u00ean trong m\u1ed9t l\u1ef1a ch\u1ecdn t\u1ea1o th\u00e0nh m\u1ed9t m\u00ea cung th\u1ecb gi\u00e1c.<\/p>\n

                    \n
                  • S\u1eeda:<\/strong> H\u1ea1n ch\u1ebf vi\u1ec7c l\u1ed3ng gh\u00e9p t\u1ed1i \u0111a hai c\u1ea5p \u0111\u1ed9. N\u1ebfu logic ph\u1ee9c t\u1ea1p h\u01a1n, h\u00e3y chia th\u00e0nh c\u00e1c s\u01a1 \u0111\u1ed3 ri\u00eang bi\u1ec7t ho\u1eb7c c\u00e1c chu\u1ed7i con.<\/li>\n<\/ul>\n

                    4. Ng\u01b0\u1eddi tham gia v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng b\u00ean ngo\u00e0i \ud83e\udd16<\/h2>\n

                    C\u00e1c s\u01a1 \u0111\u1ed3 th\u01b0\u1eddng bao g\u1ed3m ng\u01b0\u1eddi tham gia (ng\u01b0\u1eddi d\u00f9ng) ho\u1eb7c c\u00e1c h\u1ec7 th\u1ed1ng b\u00ean ngo\u00e0i (API, c\u01a1 s\u1edf d\u1eef li\u1ec7u). Vi\u1ec7c m\u00f4 t\u1ea3 sai c\u00e1c ranh gi\u1edbi n\u00e0y d\u1eabn \u0111\u1ebfn l\u1ed7i t\u00edch h\u1ee3p.<\/p>\n

                    \u274c Sai l\u1ea7m: Xem ng\u01b0\u1eddi tham gia nh\u01b0 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng n\u1ed9i b\u1ed9<\/h3>\n

                    Ng\u01b0\u1eddi tham gia ph\u1ea3i kh\u00e1c bi\u1ec7t v\u1edbi c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng h\u1ec7 th\u1ed1ng. Ch\u00fang t\u1ed3n t\u1ea1i b\u00ean ngo\u00e0i ranh gi\u1edbi h\u1ec7 th\u1ed1ng.<\/p>\n

                      \n
                    • L\u1ed7i:<\/strong> V\u1ebd ng\u01b0\u1eddi tham gia v\u1edbi c\u00f9ng h\u00ecnh d\u1ea1ng nh\u01b0 c\u00e1c l\u1edbp n\u1ed9i b\u1ed9.<\/li>\n
                    • S\u1eeda:<\/strong> S\u1eed d\u1ee5ng h\u00ecnh ng\u01b0\u1eddi tham gia d\u1ea1ng que ti\u00eau chu\u1ea9n UML cho ng\u01b0\u1eddi d\u00f9ng con ng\u01b0\u1eddi. S\u1eed d\u1ee5ng h\u00ecnh ch\u1eef nh\u1eadt ranh gi\u1edbi ho\u1eb7c h\u00ecnh d\u1ea1ng ri\u00eang bi\u1ec7t cho c\u00e1c h\u1ec7 th\u1ed1ng b\u00ean ngo\u00e0i.<\/li>\n<\/ul>\n

                      \u274c Sai l\u1ea7m: Thi\u1ebfu ranh gi\u1edbi h\u1ec7 th\u1ed1ng<\/h3>\n

                      Kh\u00f4ng c\u00f3 ranh gi\u1edbi r\u00f5 r\u00e0ng, s\u1ebd kh\u00f4ng r\u00f5 tin nh\u1eafn n\u00e0o v\u01b0\u1ee3t qua gi\u1edbi h\u1ea1n h\u1ec7 th\u1ed1ng.<\/p>\n

                        \n
                      • S\u1eeda:<\/strong> V\u1ebd m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt l\u1edbn bao quanh c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng n\u1ed9i b\u1ed9. \u0110\u1eb7t nh\u00e3n l\u00e0 \u201cT\u00ean h\u1ec7 th\u1ed1ng\u201d. C\u00e1c tin nh\u1eafn v\u01b0\u1ee3t qua \u0111\u01b0\u1eddng n\u00e0y l\u00e0 c\u00e1c giao di\u1ec7n b\u00ean ngo\u00e0i.<\/li>\n<\/ul>\n

                        5. Ti\u00eau chu\u1ea9n kh\u1ea3 n\u0103ng \u0111\u1ecdc v\u00e0 t\u00e0i li\u1ec7u \ud83d\udcdd<\/h2>\n

                        M\u1ed9t s\u01a1 \u0111\u1ed3 s\u1ebd v\u00f4 d\u1ee5ng n\u1ebfu \u0111\u1ed9i ng\u0169 kh\u00f4ng th\u1ec3 \u0111\u1ecdc nhanh ch\u00f3ng. T\u00ednh r\u00f5 r\u00e0ng quan tr\u1ecdng ngang b\u1eb1ng v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n

                        \u274c Sai l\u1ea7m: Thi\u1ebfu b\u1ed1i c\u1ea3nh<\/h3>\n

                        C\u00e1c s\u01a1 \u0111\u1ed3 th\u01b0\u1eddng ch\u1ec9 ra m\u1ed9t tin nh\u1eafn duy nh\u1ea5t m\u00e0 kh\u00f4ng c\u00f3 b\u1ed1i c\u1ea3nh. Ng\u01b0\u1eddi \u0111\u1ecdc kh\u00f4ng bi\u1ebft \u0111i\u1ec1u ki\u1ec7n ti\u1ec1n v\u00e0 \u0111i\u1ec1u ki\u1ec7n h\u1eadu.<\/p>\n

                          \n
                        • S\u1eeda:<\/strong> Th\u00eam m\u00f4 t\u1ea3 ng\u1eafn \u1edf ph\u00eda tr\u00ean s\u01a1 \u0111\u1ed3 \u0111\u1ec3 gi\u1ea3i th\u00edch t\u00ecnh hu\u1ed1ng (v\u00ed d\u1ee5: \u201cNg\u01b0\u1eddi d\u00f9ng c\u1ed1 g\u1eafng \u0111\u1eb7t l\u1ea1i m\u1eadt kh\u1ea9u\u201d).<\/li>\n
                        • S\u1eeda:<\/strong> S\u1eed d\u1ee5ng ghi ch\u00fa ho\u1eb7c b\u00ecnh lu\u1eadn \u0111\u1ec3 gi\u1ea3i th\u00edch logic ph\u1ee9c t\u1ea1p m\u00e0 kh\u00f4ng th\u1ec3 th\u1ec3 hi\u1ec7n b\u1eb1ng c\u00e1c m\u0169i t\u00ean.<\/li>\n<\/ul>\n

                          \u274c Sai l\u1ea7m: T\u00ean g\u1ecdi kh\u00f4ng nh\u1ea5t qu\u00e1n<\/h3>\n

                          S\u1eed d\u1ee5ng c\u00e1c t\u00ean kh\u00e1c nhau cho c\u00f9ng m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng trong c\u00e1c s\u01a1 \u0111\u1ed3 kh\u00e1c nhau s\u1ebd l\u00e0m ng\u01b0\u1eddi \u0111\u1ecdc b\u1ed1i r\u1ed1i.<\/p>\n

                            \n
                          • S\u1eeda ch\u1eefa:<\/strong>\u00c1p d\u1ee5ng quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean. S\u1eed d\u1ee5ng \u201cNg\u01b0\u1eddi d\u00f9ng\u201d thay v\u00ec \u201cKh\u00e1ch h\u00e0ng\u201d ho\u1eb7c \u201cKh\u00e1ch\u201d m\u1ed9t c\u00e1ch nh\u1ea5t qu\u00e1n. S\u1eed d\u1ee5ng t\u00ean \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a l\u1edbp cho c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng (v\u00ed d\u1ee5 nh\u01b0 PaymentService<\/code> thay v\u00ec Service<\/code>).<\/li>\n<\/ul>\n

                            \u274c Sai l\u1ea7m: Vi ph\u1ea1m th\u1eddi gian<\/h3>\n

                            Th\u1eddi gian ch\u1ea3y t\u1eeb tr\u00ean xu\u1ed1ng d\u01b0\u1edbi. N\u1ebfu m\u1ed9t tin nh\u1eafn xu\u1ea5t hi\u1ec7n \u1edf v\u1ecb tr\u00ed cao h\u01a1n tin nh\u1eafn g\u00e2y ra n\u00f3, \u0111i\u1ec1u \u0111\u00f3 ng\u1ee5 \u00fd m\u1ed9t ngh\u1ecbch l\u00fd v\u1ec1 th\u1eddi gian.<\/p>\n

                              \n
                            • S\u1eeda ch\u1eefa:<\/strong>\u0110\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1c m\u0169i t\u00ean \u0111\u1ec1u h\u01b0\u1edbng xu\u1ed1ng d\u01b0\u1edbi so v\u1edbi \u0111i\u1ec3m kh\u1edfi ph\u00e1t, ngo\u1ea1i tr\u1eeb c\u00e1c tin nh\u1eafn tr\u1ea3 v\u1ec1 th\u00ec h\u01b0\u1edbng l\u00ean tr\u00ean.<\/li>\n
                            • Ki\u1ec3m tra:<\/strong>X\u00e1c minh r\u1eb1ng v\u1ecb tr\u00ed theo chi\u1ec1u d\u1ecdc c\u1ee7a \u0111\u1ea7u m\u0169i t\u00ean ph\u00f9 h\u1ee3p v\u1edbi d\u00f2ng ch\u1ea3y logic c\u1ee7a th\u1eddi gian.<\/li>\n<\/ul>\n

                              So s\u00e1nh c\u00e1c l\u1ed7i ph\u1ed5 bi\u1ebfn so v\u1edbi ti\u00eau chu\u1ea9n<\/h2>\n\n\n\n\n\n\n\n\n\n\n
                              V\u00f9ng<\/th>\nSai l\u1ea7m ph\u1ed5 bi\u1ebfn<\/th>\nTi\u00eau chu\u1ea9n \u0111\u00fang<\/th>\n<\/tr>\n<\/thead>\n
                              \u0110\u01b0\u1eddng s\u1ed1ng<\/td>\n\u0110\u01b0\u1eddng li\u00ean t\u1ee5c kh\u00f4ng ng\u1eaft qu\u00e3ng<\/td>\nS\u1eed d\u1ee5ng thanh k\u00edch ho\u1ea1t cho th\u1eddi gian x\u1eed l\u00fd<\/td>\n<\/tr>\n
                              Tin nh\u1eafn<\/td>\nThi\u1ebfu m\u0169i t\u00ean tr\u1ea3 v\u1ec1<\/td>\nM\u0169i t\u00ean tr\u1ea3 v\u1ec1 g\u1ea1ch n\u1ed1i cho ph\u1ea3n h\u1ed3i d\u1eef li\u1ec7u<\/td>\n<\/tr>\n
                              C\u00e1c \u0111o\u1ea1n<\/td>\nS\u1eed d\u1ee5ng alt<\/code> \u0111\u1ec3 v\u00f2ng l\u1eb7p<\/td>\nS\u1eed d\u1ee5ng loop<\/code> cho c\u00e1c l\u1ea7n l\u1eb7p<\/td>\n<\/tr>\n
                              Ng\u01b0\u1eddi tham gia<\/td>\nC\u00f9ng h\u00ecnh d\u1ea1ng v\u1edbi c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng n\u1ed9i b\u1ed9<\/td>\nH\u00ecnh ng\u01b0\u1eddi que cho ng\u01b0\u1eddi d\u00f9ng, bi\u00ean gi\u1edbi cho h\u1ec7 th\u1ed1ng<\/td>\n<\/tr>\n
                              Th\u1eddi gian<\/td>\nM\u0169i t\u00ean h\u01b0\u1edbng l\u00ean cho c\u00e1c tin nh\u1eafn m\u1edbi<\/td>\nC\u00e1c tin nh\u1eafn m\u1edbi lu\u00f4n h\u01b0\u1edbng xu\u1ed1ng<\/td>\n<\/tr>\n
                              T\u00ean<\/td>\nT\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng nh\u1ea5t qu\u00e1n<\/td>\nT\u00ean l\u1edbp chu\u1ea9n h\u00f3a tr\u00ean c\u00e1c s\u01a1 \u0111\u1ed3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                              6. B\u1ea3o tr\u00ec v\u00e0 ph\u00e1t tri\u1ec3n \ud83d\udd04<\/h2>\n

                              Ph\u1ea7n m\u1ec1m thay \u0111\u1ed5i. Y\u00eau c\u1ea7u thay \u0111\u1ed5i. M\u1ed9t s\u01a1 \u0111\u1ed3 ch\u00ednh x\u00e1c th\u00e1ng tr\u01b0\u1edbc c\u00f3 th\u1ec3 \u0111\u00e3 l\u1ed7i th\u1eddi h\u00f4m nay. B\u1ecf qua vi\u1ec7c c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3 s\u1ebd t\u1ea1o ra n\u1ee3 k\u1ef9 thu\u1eadt.<\/p>\n

                              \u274c Sai l\u1ea7m: T\u00e0i li\u1ec7u l\u1ed7i th\u1eddi<\/h3>\n

                              Gi\u1eef l\u1ea1i s\u01a1 \u0111\u1ed3 cho m\u1ed9t t\u00ednh n\u0103ng \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00e1i c\u1ea5u tr\u00fac. \u0110i\u1ec1u n\u00e0y g\u00e2y hi\u1ec3u l\u1ea7m cho c\u00e1c th\u00e0nh vi\u00ean m\u1edbi trong nh\u00f3m.<\/p>\n

                                \n
                              • Chi\u1ebfn l\u01b0\u1ee3c:<\/strong>Xem s\u01a1 \u0111\u1ed3 nh\u01b0 t\u00e0i li\u1ec7u s\u1ed1ng \u0111\u1ed9ng. C\u1eadp nh\u1eadt ch\u00fang c\u00f9ng v\u1edbi c\u00e1c b\u1ea3n ghi m\u00e3 ngu\u1ed3n khi logic t\u01b0\u01a1ng t\u00e1c thay \u0111\u1ed5i.<\/li>\n<\/ul>\n

                                \u274c Sai l\u1ea7m: Qu\u00e1 chi ti\u1ebft<\/h3>\n

                                C\u1ed1 g\u1eafng hi\u1ec3n th\u1ecb t\u1eebng truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u ri\u00eang l\u1ebb trong s\u01a1 \u0111\u1ed3 thi\u1ebft k\u1ebf c\u1ea5p cao.<\/p>\n

                                  \n
                                • Chi\u1ebfn l\u01b0\u1ee3c:<\/strong>S\u1eed d\u1ee5ng tr\u1eebu t\u01b0\u1ee3ng. Hi\u1ec3n th\u1ecb l\u1eddi g\u1ecdi d\u1ecbch v\u1ee5, ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u00e2u l\u1ec7nh SQL. D\u00e0nh lu\u1ed3ng d\u1eef li\u1ec7u chi ti\u1ebft cho s\u01a1 \u0111\u1ed3 l\u01b0\u1ee3c \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n

                                  7. Giao ti\u1ebfp v\u00e0 s\u1ef1 \u0111\u1ed3ng thu\u1eadn trong nh\u00f3m \ud83d\udde3\ufe0f<\/h2>\n

                                  M\u1ee5c ti\u00eau ch\u00ednh c\u1ee7a s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 l\u00e0 giao ti\u1ebfp. N\u1ebfu nh\u00f3m kh\u00f4ng \u0111\u1ed3ng thu\u1eadn v\u1ec1 \u00fd ngh\u0129a, s\u01a1 \u0111\u1ed3 \u0111\u00e3 th\u1ea5t b\u1ea1i.<\/p>\n

                                  \u274c Sai l\u1ea7m: T\u1ea1o ri\u00eang l\u1ebb<\/h3>\n

                                  M\u1ed9t nh\u00e0 ph\u00e1t tri\u1ec3n t\u1ea1o s\u01a1 \u0111\u1ed3 m\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 g\u00f3p \u00fd t\u1eeb ng\u01b0\u1eddi kh\u00e1c. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn nh\u1eefng \u0111i\u1ec3m m\u00f9.<\/p>\n

                                    \n
                                  • S\u1eeda ch\u1eefa:<\/strong>Xem x\u00e9t l\u1ea1i s\u01a1 \u0111\u1ed3 trong c\u00e1c cu\u1ed9c h\u1ecdp thi\u1ebft k\u1ebf. \u0110i qua lu\u1ed3ng c\u00f4ng vi\u1ec7c c\u00f9ng c\u00e1c b\u00ean li\u00ean quan tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u tri\u1ec3n khai.<\/li>\n<\/ul>\n

                                    \u274c Sai l\u1ea7m: B\u1ecf qua c\u00e1c \u0111\u01b0\u1eddng d\u1eabn l\u1ed7i<\/h3>\n

                                    C\u00e1c s\u01a1 \u0111\u1ed3 th\u01b0\u1eddng ch\u1ec9 hi\u1ec3n th\u1ecb \u0111\u01b0\u1eddng \u0111i ‘H\u1ea1nh ph\u00fac’ (t\u1ea5t c\u1ea3 \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng ho\u00e0n h\u1ea3o).<\/p>\n

                                      \n
                                    • S\u1eeda ch\u1eefa:<\/strong>Hi\u1ec3n th\u1ecb r\u00f5 r\u00e0ng x\u1eed l\u00fd l\u1ed7i. N\u1ebfu m\u1ed9t d\u1ecbch v\u1ee5 th\u1ea5t b\u1ea1i, h\u1ec7 th\u1ed1ng s\u1ebd ph\u1ea3n \u1ee9ng nh\u01b0 th\u1ebf n\u00e0o? S\u1eed d\u1ee5ngopt<\/code> ho\u1eb7c alt<\/code> \u0111\u1ec3 hi\u1ec3n th\u1ecb lu\u1ed3ng x\u1eed l\u00fd ngo\u1ea1i l\u1ec7.<\/li>\n<\/ul>\n

                                      8. Ng\u1eef ngh\u0129a k\u1ef9 thu\u1eadt v\u00e0 tu\u00e2n th\u1ee7 UML \ud83d\udcd0<\/h2>\n

                                      M\u1eb7c d\u00f9 c\u00e1c c\u00f4ng c\u1ee5 kh\u00e1c nhau, ti\u00eau chu\u1ea9n UML v\u1eabn l\u00e0 n\u1ec1n t\u1ea3ng. Vi\u1ec7c l\u1ec7ch kh\u1ecfi c\u00fa ph\u00e1p chu\u1ea9n khi\u1ebfn s\u01a1 \u0111\u1ed3 tr\u1edf n\u00ean kh\u00f3 \u0111\u1ecdc \u0111\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 kh\u00e1c nhau.<\/p>\n

                                      \u274c Sai l\u1ea7m: K\u00fd hi\u1ec7u t\u00f9y ch\u1ec9nh<\/h3>\n

                                      T\u1ea1o ra c\u00e1c ki\u1ec3u m\u0169i t\u00ean ho\u1eb7c k\u00fd hi\u1ec7u m\u1edbi kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong t\u00e0i li\u1ec7u quy chu\u1ea9n UML.<\/p>\n

                                        \n
                                      • S\u1eeda:<\/strong>Duy tr\u00ec c\u00e1c m\u0169i t\u00ean chu\u1ea9n. N\u1ebfu b\u1eaft bu\u1ed9c ph\u1ea3i s\u1eed d\u1ee5ng logic t\u00f9y ch\u1ec9nh, h\u00e3y th\u00eam ch\u00fa th\u00edch ho\u1eb7c ghi ch\u00fa gi\u1ea3i th\u00edch k\u00fd hi\u1ec7u.<\/li>\n<\/ul>\n

                                        \u274c Sai l\u1ea7m: Tr\u1ed9n l\u1eabn c\u00e1c lo\u1ea1i s\u01a1 \u0111\u1ed3<\/h3>\n

                                        \u0110\u01b0a logic t\u1ea1o ho\u1eb7c h\u1ee7y \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0o s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 khi s\u01a1 \u0111\u1ed3 L\u1edbp ho\u1eb7c S\u01a1 \u0111\u1ed3 Tr\u1ea1ng th\u00e1i ph\u00f9 h\u1ee3p h\u01a1n.<\/p>\n

                                          \n
                                        • S\u1eeda:<\/strong>S\u1eed d\u1ee5ng S\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 cho t\u01b0\u01a1ng t\u00e1c t\u1ea1i th\u1eddi \u0111i\u1ec3m ch\u1ea1y. S\u1eed d\u1ee5ng S\u01a1 \u0111\u1ed3 L\u1edbp cho c\u1ea5u tr\u00fac t\u0129nh. Gi\u1eef ph\u1ea1m vi t\u1eadp trung.<\/li>\n<\/ul>\n

                                          9. Xem x\u00e9t v\u1ec1 hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed3ng th\u1eddi \u26a1<\/h2>\n

                                          C\u00e1c h\u1ec7 th\u1ed1ng hi\u1ec7n \u0111\u1ea1i th\u01b0\u1eddng ph\u00e2n t\u00e1n. S\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 ph\u1ea3i ph\u1ea3n \u00e1nh ch\u00ednh x\u00e1c t\u00ednh \u0111\u1ed3ng th\u1eddi.<\/p>\n

                                          \u274c Sai l\u1ea7m: Bi\u1ebfn c\u00e1c qu\u00e1 tr\u00ecnh song song th\u00e0nh tu\u1ea7n t\u1ef1<\/h3>\n

                                          Hi\u1ec3n th\u1ecb hai s\u1ef1 ki\u1ec7n song song nh\u01b0 c\u00e1c b\u01b0\u1edbc tu\u1ea7n t\u1ef1.<\/p>\n

                                            \n
                                          • S\u1eeda:<\/strong> S\u1eed d\u1ee5ng \u0111o\u1ea1n par<\/code> \u0111o\u1ea1n \u0111\u1ec3 ch\u1ec9 ra th\u1ef1c thi \u0111\u1ed3ng th\u1eddi. \u0110i\u1ec1u n\u00e0y l\u00e0m r\u00f5 r\u1eb1ng th\u1eddi gian t\u1ed5ng c\u1ed9ng kh\u00f4ng ph\u1ea3i l\u00e0 t\u1ed5ng c\u1ee7a c\u1ea3 hai b\u01b0\u1edbc.<\/li>\n<\/ul>\n

                                            \u274c Sai l\u1ea7m: B\u1ecf qua \u0111\u1ed9 tr\u1ec5 m\u1ea1ng<\/h3>\n

                                            Gi\u1ea3 \u0111\u1ecbnh giao ti\u1ebfp t\u1ee9c th\u00ec gi\u1eefa c\u00e1c d\u1ecbch v\u1ee5 ph\u00e2n t\u00e1n.<\/p>\n

                                              \n
                                            • S\u1eeda:<\/strong>Th\u00eam ch\u00fa th\u00edch ch\u1ec9 ra c\u00e1c b\u01b0\u1edbc m\u1ea1ng ho\u1eb7c th\u1eddi gian ch\u1edd n\u1ebfu ch\u00fang \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn lu\u1ed3ng logic.<\/li>\n<\/ul>\n

                                              10. Suy ngh\u0129 cu\u1ed1i c\u00f9ng v\u1ec1 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a s\u01a1 \u0111\u1ed3 \ud83c\udfaf<\/h2>\n

                                              X\u00e2y d\u1ef1ng s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 UML ch\u00ednh x\u00e1c \u0111\u00f2i h\u1ecfi s\u1ef1 k\u1ef7 lu\u1eadt. Kh\u00f4ng ch\u1ec9 v\u1ebd c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng l\u00e0 \u0111\u1ee7; b\u1ea1n ph\u1ea3i hi\u1ec3u \u0111\u01b0\u1ee3c ng\u1eef ngh\u0129a \u0111\u1eb1ng sau ch\u00fang. B\u1eb1ng c\u00e1ch s\u1eeda c\u00e1c sai l\u1ea7m ph\u1ed5 bi\u1ebfn n\u00e0y, b\u1ea1n s\u1ebd n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng t\u00e0i li\u1ec7u ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m c\u1ee7a m\u00ecnh.<\/p>\n

                                              T\u1eadp trung v\u00e0o s\u1ef1 r\u00f5 r\u00e0ng. \u0110\u1ea3m b\u1ea3o m\u1ed7i m\u0169i t\u00ean \u0111\u1ec1u c\u00f3 m\u1ee5c \u0111\u00edch. Ki\u1ec3m tra xem th\u1eddi gian c\u00f3 ch\u1ea3y m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd hay kh\u00f4ng. Duy tr\u00ec t\u00ednh nh\u1ea5t qu\u00e1n trong thu\u1eadt ng\u1eef. Nh\u1eefng th\u00f3i quen n\u00e0y s\u1ebd gi\u00fap \u0111\u1ed9i nh\u00f3m ti\u1ebft ki\u1ec7m th\u1eddi gian trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n v\u00e0 g\u1ee1 l\u1ed7i. M\u1ed9t s\u01a1 \u0111\u1ed3 r\u00f5 r\u00e0ng l\u00e0 m\u1ed9t h\u1ee3p \u0111\u1ed3ng gi\u1eefa thi\u1ebft k\u1ebf v\u00e0 tri\u1ec3n khai. H\u00e3y tr\u00e2n tr\u1ecdng h\u1ee3p \u0111\u1ed3ng \u0111\u00f3 b\u1eb1ng s\u1ef1 ch\u00ednh x\u00e1c.<\/p>\n

                                                \n
                                              • Xem x\u00e9t l\u1ea1i:<\/strong> Th\u01b0\u1eddng xuy\u00ean ki\u1ec3m tra c\u00e1c s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n so v\u1edbi m\u00e3 ngu\u1ed3n.<\/li>\n
                                              • Ti\u00eau chu\u1ea9n h\u00f3a:<\/strong> X\u00e1c \u0111\u1ecbnh c\u00e1c quy t\u1eafc cho \u0111\u1ed9i nh\u00f3m c\u1ee7a b\u1ea1n li\u00ean quan \u0111\u1ebfn k\u00fd hi\u1ec7u.<\/li>\n
                                              • H\u1ee3p t\u00e1c:<\/strong> S\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5 th\u1ea3o lu\u1eadn, ch\u1ee9 kh\u00f4ng ch\u1ec9 l\u00e0 s\u1ea3n ph\u1ea9m \u0111\u1ea7u ra.<\/li>\n<\/ul>\n

                                                Khi b\u1ea1n lo\u1ea1i b\u1ecf s\u1ef1 m\u01a1 h\u1ed3, b\u1ea1n s\u1ebd gi\u1ea3m thi\u1ec3u r\u1ee7i ro. \u0110\u1ed9i nh\u00f3m c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 t\u1eadp trung v\u00e0o vi\u1ec7c x\u00e2y d\u1ef1ng t\u00ednh n\u0103ng thay v\u00ec gi\u1ea3i m\u00e3 \u00fd \u0111\u1ecbnh thi\u1ebft k\u1ebf. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y d\u1eabn \u0111\u1ebfn c\u00e1c h\u1ec7 th\u1ed1ng v\u1eefng ch\u1eafc h\u01a1n v\u00e0 chu k\u1ef3 giao h\u00e0ng nhanh h\u01a1n.<\/p>\n","protected":false},"excerpt":{"rendered":"

                                                Vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 UML l\u00e0 k\u1ef9 n\u0103ng thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 ph\u1ea7n m\u1ec1m v\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n. Nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y tr\u1ef1c quan…<\/p>\n","protected":false},"author":1,"featured_media":1807,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 UML v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c","_yoast_wpseo_metadesc":"Tr\u00e1nh nh\u1eefng l\u1ed7i nghi\u00eam tr\u1ecdng trong thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng. H\u1ecdc c\u00e1ch kh\u1eafc ph\u1ee5c sai s\u00f3t trong s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 UML, c\u1ea3i thi\u1ec7n lu\u1ed3ng tin nh\u1eafn v\u00e0 \u0111\u1ea3m b\u1ea3o m\u00f4 h\u00ecnh h\u00f3a t\u01b0\u01a1ng t\u00e1c ch\u00ednh x\u00e1c \u0111\u1ec3 c\u00f3 ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m t\u1ed1t h\u01a1n.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[50],"tags":[80,87],"class_list":["post-1806","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language","tag-academic","tag-sequence-diagram"],"yoast_head":"\nNh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 UML v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<\/title>\n<meta name=\"description\" content=\"Tr\u00e1nh nh\u1eefng l\u1ed7i nghi\u00eam tr\u1ecdng trong thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng. 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