{"id":476721,"date":"2023-08-09T07:35:16","date_gmt":"2023-08-09T07:35:16","guid":{"rendered":""},"modified":"2023-09-05T11:13:19","modified_gmt":"2023-09-05T11:13:19","slug":"data-type","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/data-type\/","title":{"rendered":"Lo\u1ea1i d\u1eef li\u1ec7u"},"content":{"rendered":"<p>Ki\u1ec3u d\u1eef li\u1ec7u l\u00e0 th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu trong th\u1ebf gi\u1edbi l\u1eadp tr\u00ecnh m\u00e1y t\u00ednh, \u0111\u00f3ng vai tr\u00f2 l\u00e0 x\u01b0\u01a1ng s\u1ed1ng cho thao t\u00e1c v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u. Ch\u00fang l\u00e0 ph\u01b0\u01a1ng ti\u1ec7n \u0111\u1ec3 m\u00e1y t\u00ednh ph\u00e2n lo\u1ea1i v\u00e0 x\u1eed l\u00fd c\u00e1c lo\u1ea1i th\u00f4ng tin kh\u00e1c nhau.<\/p>\n<h2>S\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a c\u00e1c ki\u1ec3u d\u1eef li\u1ec7u<\/h2>\n<p>C\u00e1c ki\u1ec3u d\u1eef li\u1ec7u c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh v\u00e0o gi\u1eefa th\u1ebf k\u1ef7 20. C\u00e1c ng\u00f4n ng\u1eef l\u1eafp r\u00e1p ban \u0111\u1ea7u, \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi l\u1eadp tr\u00ecnh c\u1ea5p th\u1ea5p, kh\u00f4ng c\u00f3 ki\u1ec3u d\u1eef li\u1ec7u r\u00f5 r\u00e0ng, thay v\u00e0o \u0111\u00f3 s\u1eed d\u1ee5ng d\u1eef li\u1ec7u nh\u1ecb ph\u00e2n ho\u1eb7c th\u1eadp ph\u00e2n th\u00f4. M\u00e3i cho \u0111\u1ebfn khi c\u00e1c ng\u00f4n ng\u1eef c\u1ea5p cao nh\u01b0 FORTRAN v\u00e0 COBOL ra \u0111\u1eddi v\u00e0o nh\u1eefng n\u0103m 1950, c\u00e1c ki\u1ec3u d\u1eef li\u1ec7u r\u00f5 r\u00e0ng m\u1edbi b\u1eaft \u0111\u1ea7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 gi\u00fap c\u00e1c l\u1eadp tr\u00ecnh vi\u00ean thao t\u00e1c d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 h\u01a1n. Vi\u1ec7c \u0111\u01b0a ra kh\u00e1i ni\u1ec7m ki\u1ec3u d\u1eef li\u1ec7u l\u00e0 r\u1ea5t quan tr\u1ecdng v\u00ec n\u00f3 cho ph\u00e9p c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh tr\u1edf n\u00ean m\u1ea1nh m\u1ebd h\u01a1n, linh ho\u1ea1t h\u01a1n v\u00e0 d\u1ec5 s\u1eed d\u1ee5ng h\u01a1n.<\/p>\n<h2>M\u1ed9t c\u00e1i nh\u00ecn s\u00e2u s\u1eafc v\u1ec1 c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u<\/h2>\n<p>V\u1ec1 b\u1ea3n ch\u1ea5t, ki\u1ec3u d\u1eef li\u1ec7u l\u00e0 s\u1ef1 ph\u00e2n lo\u1ea1i x\u00e1c \u0111\u1ecbnh m\u1ed9t trong nhi\u1ec1u lo\u1ea1i d\u1eef li\u1ec7u kh\u00e1c nhau. N\u00f3 x\u00e1c \u0111\u1ecbnh c\u00e1c gi\u00e1 tr\u1ecb c\u00f3 th\u1ec3 c\u00f3 m\u00e0 m\u1ed9t ph\u1ea7n d\u1eef li\u1ec7u c\u00f3 th\u1ec3 c\u00f3, c\u00e1c thao t\u00e1c c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean \u0111\u00f3 v\u00e0 c\u00e1ch l\u01b0u tr\u1eef c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a lo\u1ea1i \u0111\u00f3. C\u00e1c ki\u1ec3u d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh nguy\u00ean th\u1ee7y ho\u1eb7c kh\u00f4ng nguy\u00ean th\u1ee7y. C\u00e1c ki\u1ec3u d\u1eef li\u1ec7u nguy\u00ean th\u1ee7y bao g\u1ed3m s\u1ed1 nguy\u00ean, s\u1ed1 float, k\u00fd t\u1ef1 v\u00e0 boolean, trong khi c\u00e1c ki\u1ec3u d\u1eef li\u1ec7u kh\u00f4ng nguy\u00ean th\u1ee7y bao g\u1ed3m m\u1ea3ng, l\u1edbp v\u00e0 giao di\u1ec7n.<\/p>\n<p>M\u1ed7i lo\u1ea1i d\u1eef li\u1ec7u c\u00f3 m\u1ed9t k\u00edch th\u01b0\u1edbc c\u1ee5 th\u1ec3 v\u00e0 m\u1ed9t ph\u1ea1m vi gi\u00e1 tr\u1ecb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n trong \u0111\u00f3. V\u00ed d\u1ee5, trong nhi\u1ec1u ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh, ki\u1ec3u s\u1ed1 nguy\u00ean (int) c\u00f3 th\u1ec3 l\u01b0u tr\u1eef s\u1ed1 nguy\u00ean, trong khi ki\u1ec3u d\u1ea5u ph\u1ea9y \u0111\u1ed9ng (float) c\u00f3 th\u1ec3 l\u01b0u tr\u1eef s\u1ed1 c\u00f3 d\u1ea5u th\u1eadp ph\u00e2n.<\/p>\n<h2>C\u01a1 ch\u1ebf n\u1ed9i b\u1ed9 c\u1ee7a c\u00e1c ki\u1ec3u d\u1eef li\u1ec7u<\/h2>\n<p>M\u1ed7i lo\u1ea1i d\u1eef li\u1ec7u, d\u00f9 l\u00e0 nguy\u00ean th\u1ee7y hay kh\u00f4ng nguy\u00ean th\u1ee7y, \u0111\u1ec1u c\u00f3 m\u1ed9t c\u1ea5u tr\u00fac b\u00ean trong duy nh\u1ea5t \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh \u0111\u1ec3 ch\u1ec9 \u0111\u1ecbnh c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3. V\u00ed d\u1ee5: ki\u1ec3u d\u1eef li\u1ec7u s\u1ed1 nguy\u00ean trong ng\u00f4n ng\u1eef C ph\u00e2n b\u1ed5 4 byte kh\u00f4ng gian b\u1ed9 nh\u1edb, cho ph\u00e9p n\u00f3 l\u01b0u tr\u1eef c\u00e1c s\u1ed1 trong ph\u1ea1m vi t\u1eeb -2.147.483.648 \u0111\u1ebfn 2.147.483.647.<\/p>\n<p>C\u00e1c ki\u1ec3u d\u1eef li\u1ec7u t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c quy tr\u00ecnh qu\u1ea3n l\u00fd v\u00e0 c\u1ea5p ph\u00e1t b\u1ed9 nh\u1edb, cho ph\u00e9p l\u01b0u tr\u1eef v\u00e0 thao t\u00e1c d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3. Ch\u00fang chi ph\u1ed1i c\u00e1ch c\u00e1c to\u00e1n t\u1eed v\u00e0 h\u00e0m trong ng\u00f4n ng\u1eef t\u01b0\u01a1ng t\u00e1c v\u1edbi d\u1eef li\u1ec7u, cung c\u1ea5p ng\u1eef c\u1ea3nh v\u00e0 quy t\u1eafc \u0111\u1ec3 thao t\u00e1c d\u1eef li\u1ec7u.<\/p>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a ki\u1ec3u d\u1eef li\u1ec7u<\/h2>\n<p>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u01a1 b\u1ea3n c\u1ee7a ki\u1ec3u d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00f3m t\u1eaft nh\u01b0 sau:<\/p>\n<ol>\n<li><strong>Lo\u1ea1i gi\u00e1 tr\u1ecb:<\/strong> X\u00e1c \u0111\u1ecbnh lo\u1ea1i gi\u00e1 tr\u1ecb m\u00e0 ki\u1ec3u d\u1eef li\u1ec7u c\u00f3 th\u1ec3 ch\u1ee9a. V\u00ed d\u1ee5: s\u1ed1 nguy\u00ean, d\u1ea5u ph\u1ea9y \u0111\u1ed9ng, k\u00fd t\u1ef1, v.v.<\/li>\n<li><strong>K\u00edch c\u1ee1:<\/strong> X\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng b\u1ed9 nh\u1edb \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed5 cho m\u1ed9t ki\u1ec3u d\u1eef li\u1ec7u c\u1ee5 th\u1ec3.<\/li>\n<li><strong>Ho\u1ea1t \u0111\u1ed9ng:<\/strong> X\u00e1c \u0111\u1ecbnh nh\u1eefng thao t\u00e1c n\u00e0o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean ki\u1ec3u d\u1eef li\u1ec7u.<\/li>\n<li><strong>Th\u1ef1c hi\u1ec7n:<\/strong> X\u00e1c \u0111\u1ecbnh c\u00e1ch th\u1ec3 hi\u1ec7n ki\u1ec3u d\u1eef li\u1ec7u trong b\u1ed9 nh\u1edb h\u1ec7 th\u1ed1ng.<\/li>\n<\/ol>\n<h2>Ph\u00e2n lo\u1ea1i ki\u1ec3u d\u1eef li\u1ec7u<\/h2>\n<p>\u0110\u00e2y l\u00e0 b\u1ea3ng \u0111\u01a1n gi\u1ea3n hi\u1ec3n th\u1ecb c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u ch\u00ednh, k\u00edch th\u01b0\u1edbc c\u1ee7a ch\u00fang v\u00e0 c\u00e1c gi\u00e1 tr\u1ecb m\u00e0 ch\u00fang c\u00f3 th\u1ec3 ch\u1ee9a:<\/p>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i d\u1eef li\u1ec7u<\/th>\n<th>K\u00edch th\u01b0\u1edbc (t\u00ednh b\u1eb1ng byte)<\/th>\n<th>Ph\u1ea1m vi gi\u00e1 tr\u1ecb<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>int<\/td>\n<td>4<\/td>\n<td>-2.147.483.648 \u0111\u1ebfn 2.147.483.647<\/td>\n<\/tr>\n<tr>\n<td>tr\u00f4i n\u1ed5i<\/td>\n<td>4<\/td>\n<td>1,2E-38 \u0111\u1ebfn 3,4E+38<\/td>\n<\/tr>\n<tr>\n<td>k\u00fd t\u1ef1<\/td>\n<td>1<\/td>\n<td>-128 \u0111\u1ebfn 127 ho\u1eb7c 0 \u0111\u1ebfn 255<\/td>\n<\/tr>\n<tr>\n<td>boolean<\/td>\n<td>1<\/td>\n<td>\u0111\u00fang hay sai<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>S\u1eed d\u1ee5ng c\u00e1c ki\u1ec3u d\u1eef li\u1ec7u v\u00e0 c\u00e1c th\u00e1ch th\u1ee9c li\u00ean quan<\/h2>\n<p>Ki\u1ec3u d\u1eef li\u1ec7u r\u1ea5t c\u1ea7n thi\u1ebft trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac d\u1eef li\u1ec7u trong \u1ee9ng d\u1ee5ng, \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u00ednh x\u00e1c v\u00e0 t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng b\u1ed9 nh\u1edb. Tuy nhi\u00ean, vi\u1ec7c s\u1eed d\u1ee5ng sai ki\u1ec3u d\u1eef li\u1ec7u ho\u1eb7c kh\u00f4ng hi\u1ec3u \u00fd ngh\u0129a c\u1ee7a ki\u1ec3u d\u1eef li\u1ec7u c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 tr\u00e0n d\u1eef li\u1ec7u, m\u1ea5t \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 t\u0103ng m\u1ee9c s\u1eed d\u1ee5ng b\u1ed9 nh\u1edb.<\/p>\n<p>V\u00ed d\u1ee5: n\u1ebfu s\u1eed d\u1ee5ng ki\u1ec3u d\u1eef li\u1ec7u s\u1ed1 nguy\u00ean \u0111\u1ec3 l\u01b0u tr\u1eef gi\u00e1 tr\u1ecb th\u1eadp ph\u00e2n th\u00ec ph\u1ea7n ph\u00e2n s\u1ed1 s\u1ebd b\u1ecb m\u1ea5t, d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 kh\u00f4ng ch\u00ednh x\u00e1c. V\u00ec v\u1eady, vi\u1ec7c hi\u1ec3u v\u00e0 ch\u1ecdn \u0111\u00fang ki\u1ec3u d\u1eef li\u1ec7u l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng.<\/p>\n<h2>So s\u00e1nh v\u00e0 \u0111\u1eb7c t\u00ednh<\/h2>\n<p>So s\u00e1nh c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u tr\u00ean c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh kh\u00e1c nhau, ch\u00fang t\u00f4i th\u1ea5y r\u1eb1ng m\u1eb7c d\u00f9 ch\u00fang c\u00f3 chung c\u00e1c kh\u00e1i ni\u1ec7m nh\u01b0ng c\u00e1ch tri\u1ec3n khai v\u00e0 chi ti\u1ebft th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 kh\u00e1c nhau. Ch\u1eb3ng h\u1ea1n, m\u1ed9t s\u1ed1 nguy\u00ean trong Java l\u00e0 4 byte, trong khi \u1edf Python, k\u00edch th\u01b0\u1edbc c\u1ee7a s\u1ed1 nguy\u00ean c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u00f9y theo gi\u00e1 tr\u1ecb m\u00e0 n\u00f3 gi\u1eef.<\/p>\n<p>\u0110\u00e2y l\u00e0 b\u1ea3ng so s\u00e1nh minh h\u1ecda s\u1ef1 bi\u1ebfn \u0111\u1ed5i c\u1ee7a ki\u1ec3u d\u1eef li\u1ec7u s\u1ed1 nguy\u00ean tr\u00ean c\u00e1c ng\u00f4n ng\u1eef kh\u00e1c nhau:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ng\u00f4n ng\u1eef<\/th>\n<th>K\u00edch th\u01b0\u1edbc s\u1ed1 nguy\u00ean (t\u00ednh b\u1eb1ng byte)<\/th>\n<th>Ph\u1ea1m vi gi\u00e1 tr\u1ecb<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>C<\/td>\n<td>4<\/td>\n<td>-2.147.483.648 \u0111\u1ebfn 2.147.483.647<\/td>\n<\/tr>\n<tr>\n<td>Java<\/td>\n<td>4<\/td>\n<td>-2.147.483.648 \u0111\u1ebfn 2.147.483.647<\/td>\n<\/tr>\n<tr>\n<td>Python<\/td>\n<td>Thay \u0111\u1ed5i theo gi\u00e1 tr\u1ecb<\/td>\n<td>-2.147.483.648 \u0111\u1ebfn 2.147.483.647<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng lai<\/h2>\n<p>Khi c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh ph\u00e1t tri\u1ec3n, kh\u00e1i ni\u1ec7m v\u1ec1 ki\u1ec3u d\u1eef li\u1ec7u c\u0169ng ph\u00e1t tri\u1ec3n. V\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 m\u00e1y h\u1ecdc v\u00e0 d\u1eef li\u1ec7u l\u1edbn, c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u m\u1edbi nh\u01b0 tensor \u0111ang \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n \u0111\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u \u0111a chi\u1ec1u. T\u01b0\u01a1ng lai c\u1ee7a c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u n\u1eb1m \u1edf c\u00e1c d\u1ea1ng chuy\u00ean bi\u1ec7t h\u01a1n c\u00f3 th\u1ec3 x\u1eed l\u00fd hi\u1ec7u qu\u1ea3 c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u c\u1ee5 th\u1ec3, d\u1eabn \u0111\u1ebfn c\u00e1c \u1ee9ng d\u1ee5ng m\u1ea1nh m\u1ebd v\u00e0 t\u1ed1i \u01b0u h\u01a1n.<\/p>\n<h2>S\u1ef1 giao thoa gi\u1eefa m\u00e1y ch\u1ee7 proxy v\u00e0 ki\u1ec3u d\u1eef li\u1ec7u<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 h\u01b0\u1edfng l\u1ee3i t\u1eeb vi\u1ec7c s\u1eed d\u1ee5ng h\u1ee3p l\u00fd c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u theo nhi\u1ec1u c\u00e1ch. V\u00ed d\u1ee5: m\u00e1y ch\u1ee7 proxy th\u01b0\u1eddng x\u1eed l\u00fd l\u01b0\u1ee3ng l\u1edbn d\u1eef li\u1ec7u m\u1ea1ng v\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng \u0111\u00fang lo\u1ea1i d\u1eef li\u1ec7u c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng b\u1ed9 nh\u1edb v\u00e0 t\u0103ng t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd d\u1eef li\u1ec7u. Ngo\u00e0i ra, c\u00e1c ki\u1ec3u d\u1eef li\u1ec7u c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac c\u1ee7a nh\u1eadt k\u00fd v\u00e0 th\u00f4ng tin kh\u00e1c, gi\u00fap qu\u1ea3n l\u00fd v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u truy\u1ec1n qua m\u00e1y ch\u1ee7 proxy d\u1ec5 d\u00e0ng h\u01a1n.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam ki\u1ebfn th\u1ee9c chuy\u00ean s\u00e2u v\u1ec1 c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u, vui l\u00f2ng tham kh\u1ea3o c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ol>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Data_type\" target=\"_new\" rel=\"noopener nofollow\">Wikipedia: Ki\u1ec3u d\u1eef li\u1ec7u<\/a><\/li>\n<li><a href=\"https:\/\/docs.oracle.com\/javase\/tutorial\/java\/nutsandbolts\/datatypes.html\" target=\"_new\" rel=\"noopener nofollow\">T\u00e0i li\u1ec7u Oracle: C\u00e1c ki\u1ec3u d\u1eef li\u1ec7u nguy\u00ean th\u1ee7y<\/a><\/li>\n<li><a href=\"https:\/\/docs.python.org\/3\/library\/stdtypes.html\" target=\"_new\" rel=\"noopener nofollow\">T\u00e0i li\u1ec7u Python: C\u00e1c lo\u1ea1i t\u00edch h\u1ee3p<\/a><\/li>\n<li><a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/JavaScript\/Data_structures\" target=\"_new\" rel=\"noopener nofollow\">M\u1ea1ng l\u01b0\u1edbi nh\u00e0 ph\u00e1t tri\u1ec3n Mozilla: C\u00e1c ki\u1ec3u d\u1eef li\u1ec7u v\u00e0 c\u1ea5u tr\u00fac d\u1eef li\u1ec7u JavaScript<\/a><\/li>\n<\/ol>","protected":false},"featured_media":468154,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476721","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Data Type: A Fundamental Building Block in Programming<\/mark>","faq_items":[{"question":"What is a Data Type in programming?","answer":"<p>A data type in programming is a classification that identifies one of various types of data. It stipulates the potential values that a data item can hold, the operations that can be performed on it, and how values of that type can be stored.<\/p>"},{"question":"What is the historical origin of Data Types?","answer":"<p>Data types originated with the advent of high-level programming languages like FORTRAN and COBOL in the 1950s. Prior to that, assembly languages didn't have explicit data types and dealt with raw binary or decimal data.<\/p>"},{"question":"What is the internal structure of a Data Type?","answer":"<p>Each data type has a unique internal structure determined by the programming language that dictates how it functions. This structure specifies how much memory the data type requires, how the memory is allocated, and what range of values it can store.<\/p>"},{"question":"What are some key features of Data Types?","answer":"<p>The key features of data types are the type of values they can hold, their size (how much memory they occupy), the operations that can be performed on them, and their internal representation in the system memory.<\/p>"},{"question":"What are the various types of Data Types?","answer":"<p>Data types can be broadly categorized as primitive and non-primitive. Primitive data types include integers, floats, characters, and booleans. Non-primitive data types include arrays, classes, and interfaces.<\/p>"},{"question":"What are some problems associated with using Data Types?","answer":"<p>Potential problems with using data types include data overflow, loss of precision, and increased memory usage. These issues often arise from using the incorrect data type or not fully understanding the implications of a particular data type.<\/p>"},{"question":"How do Data Types evolve with future technologies?","answer":"<p>As programming languages and technologies evolve, so do data types. For instance, the rise of machine learning and big data technologies has led to the development of new data types like tensors to handle multidimensional data.<\/p>"},{"question":"How are Proxy Servers associated with Data Types?","answer":"<p>Proxy servers can benefit from the correct use of data types in various ways. For instance, handling large amounts of network data efficiently, or defining the structure of logs and other information for easier management and analysis, can be achieved with the proper use of data types.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476721","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476721\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/468154"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}