{"id":28373,"date":"2025-08-28T12:30:24","date_gmt":"2025-08-28T09:30:24","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/faang-kodlama-desenleri-gun-2-algoritma-ve-veri-yapilari\/"},"modified":"2025-08-28T12:30:24","modified_gmt":"2025-08-28T09:30:24","slug":"faang-kodlama-desenleri-gun-2-algoritma-ve-veri-yapilari","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/faang-kodlama-desenleri-gun-2-algoritma-ve-veri-yapilari\/","title":{"rendered":"FAANG Kodlama Desenleri &#8211; G\u00fcn 2: Algoritma ve Veri Yap\u0131lar\u0131"},"content":{"rendered":"<p>FAANG Kodlama Desenleri &#8211; G\u00fcn 2: Algoritma ve Veri Yap\u0131lar\u0131<\/p>\n<p>FAANG \u015firketlerinin yaz\u0131l\u0131m m\u00fchendisli\u011fi m\u00fclakatlar\u0131nda s\u0131kl\u0131kla kar\u015f\u0131n\u0131za \u00e7\u0131kan algoritma ve veri yap\u0131lar\u0131 konusuna bug\u00fcn daha derinlemesine inece\u011fiz. Bu makale, yeni ba\u015flayanlardan deneyimli geli\u015ftiricilere kadar herkesin faydalanabilece\u011fi bir \u00f6\u011frenme yol haritas\u0131 sunuyor.  S\u0131f\u0131rdan ba\u015flayarak, ad\u0131m ad\u0131m ilerleyerek, ger\u00e7ek d\u00fcnya senaryolar\u0131yla desteklenen \u00f6rnekler ve ileri d\u00fczey tekniklerle FAANG m\u00fclakatlar\u0131n\u0131 ba\u015far\u0131yla ge\u00e7menize yard\u0131mc\u0131 olacak bilgileri payla\u015faca\u011f\u0131z.  Karma\u015f\u0131k algoritmalar\u0131 anlamak ve etkin veri yap\u0131lar\u0131 se\u00e7mek, kodunuzun performans\u0131n\u0131 ve \u00f6l\u00e7eklenebilirli\u011fini \u00f6nemli \u00f6l\u00e7\u00fcde etkiler.<\/p>\n<h2>Yeni Ba\u015flayanlar \u0130\u00e7in: Temel Veri Yap\u0131lar\u0131 Nedir ve Nas\u0131l Kullan\u0131l\u0131r?<\/h2>\n<p>Algoritma ve veri yap\u0131lar\u0131, yaz\u0131l\u0131m\u0131n temel yap\u0131 ta\u015flar\u0131d\u0131r.  Veri yap\u0131lar\u0131, verinin bilgisayar belle\u011finde nas\u0131l organize edildi\u011fini tan\u0131mlar.  \u00d6rne\u011fin, bir dizi (array), elemanlar\u0131 ard\u0131\u015f\u0131k olarak saklar.  Bir ba\u011fl\u0131 liste (linked list) ise her eleman\u0131n bir sonraki elemana i\u015faret\u00e7i i\u00e7erdi\u011fi bir yap\u0131d\u0131r.  Bu iki veri yap\u0131s\u0131n\u0131n performans\u0131 farkl\u0131d\u0131r.  Diziye rastgele eri\u015fim h\u0131zl\u0131d\u0131r (O(1)), ancak eleman eklemek veya silmek yava\u015ft\u0131r (O(n)). Ba\u011fl\u0131 listede eleman ekleme ve silme h\u0131zl\u0131d\u0131r (O(1)), ancak rastgele eri\u015fim yava\u015ft\u0131r (O(n)).  Bu farkl\u0131l\u0131klar\u0131 anlamak, do\u011fru veri yap\u0131s\u0131n\u0131 se\u00e7mek i\u00e7in kritiktir.<\/p>\n<p>Ba\u015flang\u0131\u00e7 seviyesinde, a\u015fa\u011f\u0131daki temel veri yap\u0131lar\u0131n\u0131 \u00f6\u011frenmeniz faydal\u0131 olacakt\u0131r:<\/p>\n<ul>\n<li>Diziler (Arrays)<\/li>\n<li>Ba\u011fl\u0131 Listeler (Linked Lists)<\/li>\n<li>Y\u0131\u011f\u0131nlar (Stacks)<\/li>\n<li>Kuyruklar (Queues)<\/li>\n<li>A\u011fa\u00e7lar (Trees) &#8211; \u00d6zellikle ikili arama a\u011fa\u00e7lar\u0131 (Binary Search Trees)<\/li>\n<\/ul>\n<p>\u00d6rne\u011fin, bir y\u0131\u011f\u0131n (LIFO &#8211; Last In, First Out) yap\u0131s\u0131, fonksiyon \u00e7a\u011fr\u0131lar\u0131n\u0131 y\u00f6netmek veya geri alma (undo) i\u015flemlerini ger\u00e7ekle\u015ftirmek i\u00e7in idealdir. Kuyruk (FIFO &#8211; First In, First Out) yap\u0131s\u0131 ise yazd\u0131rma kuyru\u011fu veya g\u00f6rev planlama gibi uygulamalarda kullan\u0131l\u0131r.  Her veri yap\u0131s\u0131n\u0131n avantajlar\u0131 ve dezavantajlar\u0131 vard\u0131r ve do\u011fru veri yap\u0131s\u0131n\u0131 se\u00e7mek, kodun performans\u0131n\u0131 ve okunabilirli\u011fini \u00f6nemli \u00f6l\u00e7\u00fcde etkiler.  Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> sitesini ziyaret edebilirsiniz.<\/p>\n<h2>Orta Seviye: S\u0131ralama Algoritmalar\u0131 ve Karma\u015f\u0131kl\u0131k Analizi<\/h2>\n<p>Orta seviyede, farkl\u0131 s\u0131ralama algoritmalar\u0131n\u0131 ve bunlar\u0131n zaman ve uzay karma\u015f\u0131kl\u0131\u011f\u0131n\u0131 anlaman\u0131z gerekir.  S\u0131ralama, veriyi belirli bir s\u0131raya koyma i\u015flemidir.  Yayg\u0131n s\u0131ralama algoritmalar\u0131 aras\u0131nda Bubble Sort, Insertion Sort, Merge Sort ve Quick Sort yer al\u0131r.  Bu algoritmalar\u0131n zaman karma\u015f\u0131kl\u0131\u011f\u0131, veri k\u00fcmesinin boyutuna ba\u011fl\u0131 olarak de\u011fi\u015fir.  \u00d6rne\u011fin, Bubble Sort&#8217;un en k\u00f6t\u00fc durum zaman karma\u015f\u0131kl\u0131\u011f\u0131 O(n^2) iken, Merge Sort&#8217;un zaman karma\u015f\u0131kl\u0131\u011f\u0131 O(n log n)&#8217;dir.  Bu, Merge Sort&#8217;un b\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in Bubble Sort&#8217;tan \u00e7ok daha h\u0131zl\u0131 oldu\u011fu anlam\u0131na gelir.<\/p>\n<p>Karma\u015f\u0131kl\u0131k analizi, bir algoritman\u0131n performans\u0131n\u0131 de\u011ferlendirmek i\u00e7in kullan\u0131lan bir y\u00f6ntemdir.  B\u00fcy\u00fck O g\u00f6sterimi (Big O Notation), algoritman\u0131n zaman ve uzay karma\u015f\u0131kl\u0131\u011f\u0131n\u0131 ifade etmek i\u00e7in kullan\u0131l\u0131r.  \u00d6rne\u011fin, O(n) do\u011frusal zaman karma\u015f\u0131kl\u0131\u011f\u0131, algoritman\u0131n \u00e7al\u0131\u015fma s\u00fcresinin veri k\u00fcmesinin boyutuyla orant\u0131l\u0131 oldu\u011funu g\u00f6sterir.  O(log n) ise logaritmik zaman karma\u015f\u0131kl\u0131\u011f\u0131 g\u00f6sterir, yani veri k\u00fcmesi b\u00fcy\u00fcd\u00fck\u00e7e algoritman\u0131n \u00e7al\u0131\u015fma s\u00fcresi daha yava\u015f artar.<\/p>\n<p>Ger\u00e7ek d\u00fcnya senaryosu olarak, bir e-ticaret sitesindeki \u00fcr\u00fcnlerin fiyat\u0131na g\u00f6re s\u0131ralanmas\u0131n\u0131 ele alal\u0131m.  Milyonlarca \u00fcr\u00fcn i\u00e7in Bubble Sort kullanmak olduk\u00e7a yava\u015f olurken, Merge Sort \u00e7ok daha h\u0131zl\u0131 ve verimli bir sonu\u00e7 sa\u011flar.  Do\u011fru algoritma se\u00e7imi, performans a\u00e7\u0131s\u0131ndan kritiktir.<\/p>\n<h2>\u0130leri D\u00fczey: Grafikler, Dinamik Programlama ve Ger\u00e7ek Zamanl\u0131 K\u0131s\u0131tlamalar<\/h2>\n<p>\u0130leri d\u00fczey konulara ge\u00e7meden \u00f6nce, orta seviyedeki temel kavramlar\u0131 iyi anlaman\u0131z \u00f6nemlidir.  \u0130leri d\u00fczey konular, genellikle daha karma\u015f\u0131k algoritmalar ve veri yap\u0131lar\u0131 gerektirir.  \u00d6rne\u011fin, grafikler (Graphs), sosyal a\u011flar, navigasyon sistemleri ve a\u011f analizinde kullan\u0131l\u0131r.  Dinamik programlama (Dynamic Programming), alt problemlerin \u00e7\u00f6z\u00fcmlerini tekrar kullanarak karma\u015f\u0131k problemleri \u00e7\u00f6zer.  Ger\u00e7ek zamanl\u0131 k\u0131s\u0131tlamalar ise belirli bir zaman s\u0131n\u0131rlamas\u0131 i\u00e7inde hesaplamalar\u0131n yap\u0131lmas\u0131 gerekti\u011fi senaryolar i\u00e7in \u00f6nemlidir.<\/p>\n<p>Grafiklerde, Dijkstra algoritmas\u0131 en k\u0131sa yolu bulmak i\u00e7in kullan\u0131l\u0131rken, Breadth-First Search (BFS) ve Depth-First Search (DFS) grafikte gezinme i\u00e7in kullan\u0131l\u0131r.  Dinamik programlama, Fibonacci say\u0131lar\u0131n\u0131n hesaplanmas\u0131 veya en uzun ortak alt dizinin bulunmas\u0131 gibi problemlerde kullan\u0131l\u0131r.  Ger\u00e7ek zamanl\u0131 k\u0131s\u0131tlamalar, oyun geli\u015ftirme veya robotik uygulamalar gibi alanlarda \u00e7ok \u00f6nemlidir.  Bu konular\u0131 derinlemesine anlamak, geli\u015fmi\u015f yaz\u0131l\u0131m sistemleri tasarlamak ve geli\u015ftirmek i\u00e7in gereklidir.<\/p>\n<p>\u00d6rnek olarak, bir navigasyon uygulamas\u0131 d\u00fc\u015f\u00fcn\u00fcn.  Bu uygulama, Dijkstra algoritmas\u0131n\u0131 kullanarak iki nokta aras\u0131ndaki en k\u0131sa yolu bulur.  Uygulama ayr\u0131ca, ger\u00e7ek zamanl\u0131 k\u0131s\u0131tlamalar\u0131 kar\u015f\u0131lamak i\u00e7in, yolu h\u0131zl\u0131 bir \u015fekilde hesaplamas\u0131 ve kullan\u0131c\u0131ya g\u00f6stermesi gerekir.<\/p>\n<h3>Grafik Algoritmalar\u0131 Nas\u0131l Uygulamaya Konur?<\/h3>\n<p>Grafik algoritmalar\u0131 uygulamak i\u00e7in, \u00f6ncelikle grafi\u011fin bir veri yap\u0131s\u0131 olarak nas\u0131l temsil edilece\u011fini belirlemeniz gerekir.  Yayg\u0131n temsiller aras\u0131nda adjacency matrix (kom\u015fuluk matrisi) ve adjacency list (kom\u015fuluk listesi) bulunur.  Adjacency matrix, her d\u00fc\u011f\u00fcm \u00e7iftinin aras\u0131ndaki ba\u011flant\u0131y\u0131 g\u00f6steren bir matristir. Adjacency list ise her d\u00fc\u011f\u00fcm i\u00e7in kom\u015fular\u0131n\u0131n bir listesini tutar.  Se\u00e7ti\u011finiz temsil, algoritman\u0131n performans\u0131n\u0131 etkileyebilir. \u00d6rne\u011fin, seyrek grafiklerde (\u00e7ok fazla ba\u011flant\u0131 i\u00e7ermeyen grafikler) adjacency list, adjacency matrix&#8217;ten daha verimli olabilir.<\/p>\n<pre><code class=\"language-javascript\">\n\/\/ Kom\u015fuluk listesi ile bir grafi\u011fin temsili\nconst graph = {\n  'A': ['B', 'C'],\n  'B': ['A', 'D', 'E'],\n  'C': ['A', 'F'],\n  'D': ['B'],\n  'E': ['B', 'F'],\n  'F': ['C', 'E']\n};\n\n\/\/ Geni\u015flik \u00f6ncelikli arama (BFS) algoritmas\u0131\nfunction bfs(graph, startNode) {\n  const visited = new Set();\n  const queue = [startNode];\n  visited.add(startNode);\n\n  while (queue.length > 0) {\n    const currentNode = queue.shift();\n    console.log(currentNode);\n\n    for (const neighbor of graph[currentNode]) {\n      if (!visited.has(neighbor)) {\n        visited.add(neighbor);\n        queue.push(neighbor);\n      }\n    }\n  }\n}\n\nbfs(graph, 'A'); \/\/ A, B, C, D, E, F \u015feklinde \u00e7\u0131kt\u0131 verir.\n<\/pre>\n<p><\/code><\/p>\n<h2>\u00d6\u011frenme Yol Haritas\u0131<\/h2>\n<p>FAANG kodlama m\u00fclakatlar\u0131na haz\u0131rlanmak i\u00e7in a\u015fa\u011f\u0131daki \u00f6\u011frenme yol haritas\u0131n\u0131 takip edebilirsiniz:<\/p>\n<h3>Yeni Ba\u015flayan<\/h3>\n<ul>\n<li>Temel veri yap\u0131lar\u0131 (diziler, ba\u011fl\u0131 listeler, y\u0131\u011f\u0131nlar, kuyruklar)<\/li>\n<li>Basit algoritmalar (lineer arama, Bubble Sort)<\/li>\n<li>Big O g\u00f6sterimi<\/li>\n<\/ul>\n<h3>Orta Seviye<\/h3>\n<ul>\n<li>Daha geli\u015fmi\u015f veri yap\u0131lar\u0131 (ikili arama a\u011fa\u00e7lar\u0131, hash tablolar\u0131)<\/li>\n<li>Verimli s\u0131ralama algoritmalar\u0131 (Merge Sort, Quick Sort)<\/li>\n<li>Karma\u015f\u0131kl\u0131k analizi uygulamalar\u0131<\/li>\n<li>Temel grafik algoritmalar\u0131 (BFS, DFS)<\/li>\n<\/ul>\n<h3>\u0130leri Seviye<\/h3>\n<ul>\n<li>Dinamik programlama<\/li>\n<li>Geli\u015fmi\u015f grafik algoritmalar\u0131 (Dijkstra, Bellman-Ford)<\/li>\n<li>Ger\u00e7ek zamanl\u0131 sistemler ve k\u0131s\u0131tlamalar\u0131<\/li>\n<li>Veritaban\u0131 ve SQL<\/li>\n<li>Sistem tasar\u0131m\u0131 prensipleri<\/li>\n<\/ul>\n<h2>Performans Kar\u015f\u0131la\u015ft\u0131rmas\u0131: Dizi vs. Ba\u011fl\u0131 Liste<\/h2>\n<p>| \u00d6zellik         | Dizi                     | Ba\u011fl\u0131 Liste               |<br \/>\n|-----------------|--------------------------|---------------------------|<br \/>\n| Rastgele Eri\u015fim  | O(1)                     | O(n)                       |<br \/>\n| Eleman Ekleme    | O(n)                     | O(1)                       |<br \/>\n| Eleman Silme     | O(n)                     | O(1)                       |<br \/>\n| Bellek Kullan\u0131m\u0131 | S\u00fcrekli, sabit           | Da\u011f\u0131n\u0131k, dinamik           |<\/p>\n<h2>Dikkat! G\u00fcvenlik Uyar\u0131lar\u0131<\/h2>\n<div style=\"border: 1px solid red; padding: 10px; background-color: #ffdddd;\">\n  Bellek y\u00f6netimi konusunda dikkatli olun. Dinamik bellek ay\u0131rma ve serbest b\u0131rakma i\u015flemlerinde hatalar, bellek s\u0131z\u0131nt\u0131lar\u0131na (memory leaks) neden olabilir.  Her zaman bellek ay\u0131rma i\u015flemini dengeleyici bir serbest b\u0131rakma i\u015flemi ile e\u015fle\u015ftirin.\n<\/div>\n<h2>Sonu\u00e7<\/h2>\n<p>Bu makalede, FAANG kodlama m\u00fclakatlar\u0131nda s\u0131kl\u0131kla sorulan algoritma ve veri yap\u0131lar\u0131 hakk\u0131nda detayl\u0131 bilgi vermeye \u00e7al\u0131\u015ft\u0131k.  Ba\u015flang\u0131\u00e7 seviyesinden ileri seviyeye kadar kademeli bir \u00f6\u011frenme yol haritas\u0131 sunduk.  Ger\u00e7ek d\u00fcnya senaryolar\u0131 ve \u00f6rnek kodlar ile konuyu daha iyi anlaman\u0131za yard\u0131mc\u0131 olduk.  Haz\u0131rl\u0131k s\u00fcrecinizde bu bilgilerden faydalanarak ba\u015far\u0131ya ula\u015fabilirsiniz.  Daha fazla kaynak ve ileri d\u00fczey konular i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> sitesini ziyaret edebilirsiniz.<\/p>\n<h2>S\u0131k\u00e7a Sorulan Sorular<\/h2>\n<ul>\n<li><strong>Big O g\u00f6sterimi nedir?<\/strong> Big O g\u00f6sterimi, bir algoritman\u0131n \u00e7al\u0131\u015fma zaman\u0131n\u0131 ve bellek kullan\u0131m\u0131n\u0131 ifade etmek i\u00e7in kullan\u0131lan bir g\u00f6sterimdir.<\/li>\n<li><strong>Hangi veri yap\u0131s\u0131n\u0131 se\u00e7meliyim?<\/strong> Bu, uygulaman\u0131z\u0131n gereksinimlerine ba\u011fl\u0131d\u0131r. Her veri yap\u0131s\u0131n\u0131n avantajlar\u0131 ve dezavantajlar\u0131 vard\u0131r.<\/li>\n<li><strong>S\u0131ralama algoritmalar\u0131 nas\u0131l \u00e7al\u0131\u015f\u0131r?<\/strong> Her s\u0131ralama algoritmas\u0131n\u0131n kendi algoritmas\u0131 vard\u0131r.  Baz\u0131lar\u0131 daha verimlidir ve daha b\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in uygundur.<\/li>\n<li><strong>Dinamik programlama nedir?<\/strong> Dinamik programlama, alt problemlerin \u00e7\u00f6z\u00fcmlerini tekrar kullanarak karma\u015f\u0131k problemleri \u00e7\u00f6zmek i\u00e7in kullan\u0131lan bir tekniktir.<\/li>\n<li><strong>Grafik algoritmalar\u0131 nerede kullan\u0131l\u0131r?<\/strong> Grafik algoritmalar\u0131, sosyal a\u011flar, navigasyon sistemleri ve a\u011f analizinde kullan\u0131l\u0131r.<\/li>\n<\/ul>\n<p>Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"FAANG Kodlama Desenleri &#8211; G\u00fcn 2: Algoritma ve Veri Yap\u0131lar\u0131 FAANG \u015firketlerinin yaz\u0131l\u0131m m\u00fchendisli\u011fi m\u00fclakatlar\u0131nda s\u0131kl\u0131kla kar\u015f\u0131n\u0131za \u00e7\u0131kan&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-28373","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>FAANG Kodlama Desenleri - G\u00fcn 2: Algoritma ve Veri Yap\u0131lar\u0131<\/title>\n<meta name=\"description\" content=\"FAANG \u015firketlerinin yaz\u0131l\u0131m m\u00fchendisli\u011fi m\u00fclakatlar\u0131nda s\u0131kl\u0131kla kar\u015f\u0131n\u0131za \u00e7\u0131kan algoritma ve veri yap\u0131lar\u0131 konusuna bug\u00fcn daha derinlemesine inece\u011fiz. Bu makale, yeni ba\u015flayanlardan deneyimli geli\u015ftiricilere kadar herkesin faydalanabilece\u011fi bir \u00f6\u011frenme yol haritas\u0131 sunuyor. S\u0131f\u0131rdan ba\u015flayarak, ad\u0131m ad\u0131m ilerleyerek, ger\u00e7ek d\u00fcnya senaryolar\u0131yla desteklenen \u00f6rnekler ve ileri d\u00fczey tekniklerle FAANG m\u00fclakatlar\u0131n\u0131 ba\u015far\u0131yla ge\u00e7menize yard\u0131mc\u0131 olacak bilgileri payla\u015faca\u011f\u0131z. Karma\u015f\u0131k algoritmalar\u0131 anlamak ve etkin veri yap\u0131lar\u0131 se\u00e7mek, kodunuzun performans\u0131n\u0131 ve \u00f6l\u00e7eklenebilirli\u011fini \u00f6nemli \u00f6l\u00e7\u00fcde etkiler.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/faang-kodlama-desenleri-gun-2-algoritma-ve-veri-yapilari\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"FAANG Kodlama Desenleri - G\u00fcn 2: Algoritma ve Veri Yap\u0131lar\u0131\" \/>\n<meta property=\"og:description\" content=\"FAANG \u015firketlerinin yaz\u0131l\u0131m m\u00fchendisli\u011fi m\u00fclakatlar\u0131nda s\u0131kl\u0131kla kar\u015f\u0131n\u0131za \u00e7\u0131kan algoritma ve veri yap\u0131lar\u0131 konusuna bug\u00fcn daha derinlemesine inece\u011fiz. 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