{"id":493,"date":"2021-07-13T15:28:48","date_gmt":"2021-07-13T15:28:48","guid":{"rendered":"https:\/\/www.wikitechy.com\/interview-questions\/?p=493"},"modified":"2021-09-13T07:11:37","modified_gmt":"2021-09-13T07:11:37","slug":"what-is-linked-list-in-data-structure-with-example","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/interview-questions\/data-structure\/what-is-linked-list-in-data-structure-with-example\/","title":{"rendered":"What is Linked List in Data Structure with example ?"},"content":{"rendered":"<div class=\"TextHeading\">\n<div class=\"hddn\">\n<h2 id=\"what-is-linked-list-in-data-structure-with-example\" class=\"color-pink\" style=\"text-align: justify;\">What is Linked List in Data Structure with example ?<\/h2>\n<\/div>\n<\/div>\n<div class=\"Content\">\n<div class=\"hddn\">\n<ul style=\"text-align: justify;\">\n<li>A linked list is a sequence of\u00a0<a href=\"https:\/\/www.wikitechy.com\/interview-questions\/data-structure\/what-is-data-structure\/\" target=\"_blank\" rel=\"noopener\">data structures<\/a>, which are connected together through links.<\/li>\n<li><a href=\"https:\/\/www.wikitechy.com\/tutorials\/java\/java-linked-list\" target=\"_blank\" rel=\"noopener\">Linked List<\/a>\u00a0is a sequence of links which contains objects. Each link contains a connection to another link. Linked list is the second most-used data structure after array.\n<ul>\n<li><b>Link \u2212\u00a0<\/b>Each link of a linked list can store a data called an element.<\/li>\n<li><b>Next \u2212\u00a0<\/b>Each link of a linked list contains a link to the next link called Next.<\/li>\n<li><b>LinkedList \u2212<\/b>\u00a0A Linked List contains the connection link to the first link called First.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<div class=\"Content\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<ul>\n<li>A linked list consists of nodes where each node contains a data field and a reference(link) to the next node in the list.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"ImageContent\">\n<div class=\"hddn\"><img decoding=\"async\" class=\"img-responsive center-block aligncenter\" src=\"https:\/\/cdn.wikitechy.com\/interview-questions\/data-structure\/linked-list-in-data-structure.png\" alt=\"Linked List in Data Structure\" \/><\/div>\n<div>\n<div class=\"TextHeading\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<h2 id=\"types-of-linked-lists\" class=\"color-purple\">Types of Linked Lists<\/h2>\n<\/div>\n<\/div>\n<div class=\"Content\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<ul>\n<li>Singly linked list<\/li>\n<li>Doubly linked list<\/li>\n<li>Circular linked list<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"subheading\" style=\"text-align: justify;\">\n<h2 id=\"singly-linked-list\">Singly linked list<\/h2>\n<\/div>\n<div class=\"Content\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<ul>\n<li>A\u00a0<a href=\"https:\/\/www.wikitechy.com\/technology\/python-programming-select-random-node-singly-linked-list\/\">singly linked list<\/a>\u00a0is Item navigation is forward only.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"ImageContent\" style=\"text-align: justify;\">\n<div class=\"hddn\"><img decoding=\"async\" class=\"img-responsive center-block aligncenter\" src=\"https:\/\/cdn.wikitechy.com\/interview-questions\/data-structure\/singly-linked-list.png\" alt=\"Singly Linked List\" \/><\/div>\n<\/div>\n<div class=\"subheading\" style=\"text-align: justify;\">\n<h2 id=\"doubly-linked-list\">Doubly linked list<\/h2>\n<\/div>\n<div class=\"Content\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<ul>\n<li>A doubly linked list is a list that has two references, one to the next node and another to previous node.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"ImageContent\">\n<div class=\"hddn\"><img decoding=\"async\" class=\"img-responsive center-block aligncenter\" src=\"https:\/\/cdn.wikitechy.com\/interview-questions\/data-structure\/doubly-linked-list.gif\" alt=\"Doubly linked list\" \/><\/div>\n<div>\n<div class=\"subheading\" style=\"text-align: justify;\">\n<h2 id=\"circular-linked-list\">Circular linked list<\/h2>\n<\/div>\n<div class=\"Content\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<ul>\n<li>Another important type of a linked list is called a\u00a0<a href=\"https:\/\/www.wikitechy.com\/technology\/circular-linked-list-introduction-applications\/\" target=\"_blank\" rel=\"noopener\">circular linked list<\/a>\u00a0where last node of the list points back to the first node (or the head) of the list.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"ImageContent\" style=\"text-align: justify;\">\n<div class=\"hddn\"><img decoding=\"async\" class=\"img-responsive center-block aligncenter\" src=\"https:\/\/cdn.wikitechy.com\/interview-questions\/data-structure\/circular-linked-list.jpg\" alt=\"Circular linked list\" \/><\/div>\n<\/div>\n<div class=\"subheading\" style=\"text-align: justify;\">\n<h2 id=\"doubly-circular-linked-list\">Doubly Circular linked list<\/h2>\n<\/div>\n<div class=\"Content\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<ul>\n<li>Circular doubly linked list is a type of data structure in which a node contain pointers to its previous node as well as the next node.<\/li>\n<li>Circular doubly linked list doesn\u2019t contain NULL in any of the node.<\/li>\n<li>The last node contains the address of the first node of the list. The first node also contain address of the last node in its previous pointer.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"ImageContent\">\n<div class=\"hddn\"><img decoding=\"async\" class=\"img-responsive center-block aligncenter\" src=\"https:\/\/cdn.wikitechy.com\/interview-questions\/data-structure\/doubly-circular-linked-list.jpg\" alt=\"Doubly Circular linked list\" \/><\/div>\n<div>\n<h2 id=\"sample-code\" class=\"color-purple\" style=\"text-align: justify;\">Sample Code:<\/h2>\n<div class=\"code-embed-wrapper\"> <div class=\"code-embed-infos\"> <\/div> <pre class=\"language-javascript code-embed-pre line-numbers\"  data-start=\"1\" data-line-offset=\"0\"><code class=\"language-javascript code-embed-code\">#include<stdio.h><br\/>#include <stdlib.h><br\/>int main()<br\/>{<br\/>   struct node<br\/>   {<br\/>      int num;<br\/>      struct node *ptr;<br\/>   };<br\/>   typedef struct node NODE;<br\/>   NODE *head, *first, *temp=0;<br\/>   int count = 0;<br\/>   int choice = 1;<br\/>   first = 0;<br\/>   while(choice)<br\/>   {<br\/>      head =(NODE*) malloc(sizeof(NODE));<br\/>      printf(&quot;Enter the data item: &quot;);<br\/>      scanf(&quot;%d&quot;, &head-> num);<br\/>      if(first != 0)<br\/>      {<br\/>         temp->ptr = head;temp = head;<br\/>      }<br\/>      else<br\/>      {<br\/>         first = temp = head;<br\/>      }<br\/>      fflush(stdin);<br\/>      printf(&quot;Do you want to continue(Type 0 or 1)?\\n\\n&quot;);<br\/>      scanf(&quot;%d&quot;, &choice);<br\/>   }<br\/>   temp->ptr = 0;<br\/>   temp = first; \/* reset temp to the beginning*\/<br\/>   printf(&quot;\\n Status of the linked list is\\n&quot;);<br\/>   while(temp!=0)<br\/>   {<br\/>      printf(&quot;%d=>&quot;, temp->num);<br\/>      count++;<br\/>      temp = temp -> ptr;<br\/>   }<br\/>   printf(&quot;NULL\\n&quot;);<br\/>   printf(&quot;No. of nodes in the list = %d\\n&quot;, count);<br\/>   return 0;<br\/>}<\/code><\/pre> <\/div>\n<h2 id=\"output\" class=\"color-purple\" style=\"text-align: justify;\">Output:<\/h2>\n<div class=\"code-embed-wrapper\"> <div class=\"code-embed-infos\"> <\/div> <pre class=\"language-markdown code-embed-pre line-numbers\"  data-start=\"1\" data-line-offset=\"0\"><code class=\"language-markdown code-embed-code\">Enter the data item: 10<br\/>Do you want to continue <Type 0 or 1>?<br\/>1<br\/>Enter the data item: 20<br\/>Do you want to continue<Type 0 or 1>?<br\/>1<br\/>Enter the data item: 30<br\/>Do you want to continue<Type 0 or 1>?<br\/>0<br\/>Status of the Linked List is<br\/>10=>20=>30=>NULL<br\/>No.of nodes in the list = 3<\/code><\/pre> <\/div>\n<div class=\"TextHeading\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<h2 id=\"advantages-of-linked-list\" class=\"color-purple\">Advantages of Linked List<\/h2>\n<\/div>\n<\/div>\n<div class=\"Content\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<ul>\n<li>Linked list is dynamic in nature which allocates the memory when required.<\/li>\n<li>In linked list, stack and queue can be easily executed.<\/li>\n<li>It reduces the access time.<\/li>\n<li>Insert and delete operation can be easily implemented in linked list.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"TextHeading\" style=\"text-align: justify;\">\n<div class=\"hddn\">\n<h2 id=\"disadvantages-of-linked-list\" class=\"color-purple\">Disadvantages of Linked List<\/h2>\n<\/div>\n<\/div>\n<div class=\"Content\">\n<div class=\"hddn\">\n<ul>\n<li style=\"text-align: justify;\">Reverse traversing is difficult in linked list.<\/li>\n<li style=\"text-align: justify;\">Linked list has to access each node sequentially; no element can be accessed randomly.<\/li>\n<li style=\"text-align: justify;\">In linked list, the memory is wasted as pointer requires extra memory for storage.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Answer : A linked list is a sequence of data structures, which are connected&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3028],"tags":[195,3408,971,15897,3430,491,221,368,203,199,214,198,363,3409,3424,3057,3433,3432,205,3301,3316,3303,3410,3304,3411,3302,3312,3431,222,484,3054,196,212,3435,3412,3429,3413,3437,3414,3182,3428,3205,3427,3415,207,366,204,206,972,3416,3417,3418,3419,3420,3421,3422,3425,200,3055,3423,3436,197,3426,968,3056,285,969],"class_list":["post-493","post","type-post","status-publish","format-standard","hentry","category-data-structure","tag-accenture-interview-questions-and-answers","tag-algorithm-for-creation-of-singly-linked-list-in-data-structure","tag-altimetrik-india-pvt-ltd-interview-questions-and-answers","tag-apostek-software-interview-questions-and-answers","tag-application-of-linked-list-in-data-structure","tag-applied-materials-interview-questions-and-answers","tag-bharti-airtel-interview-questions-and-answers","tag-bmc-software-interview-questions-and-answers","tag-capgemini-interview-questions-and-answers","tag-casting-networks-india-pvt-limited-interview-questions-and-answers","tag-cgi-group-inc-interview-questions-and-answers","tag-chetu-interview-questions-and-answers","tag-ciena-corporation-interview-questions-and-answers","tag-circular-linked-list-in-data-structure","tag-circular-linked-list-in-data-structure-program","tag-collabera-te-interview-questions-and-answers","tag-data-structure-projects-using-linked-list","tag-deletion-in-linked-list-in-data-structure","tag-dell-international-services-india-pvt-ltd-interview-questions-and-answers","tag-doubly-linked-list","tag-doubly-linked-list-deletion","tag-doubly-linked-list-in-c","tag-doubly-linked-list-in-c-source-code","tag-doubly-linked-list-in-data-structure","tag-doubly-linked-list-insertion","tag-doubly-linked-list-java","tag-doubly-linked-list-program-in-data-structure","tag-example-of-linked-list-in-data-structure","tag-flipkart-interview-questions-and-answers","tag-genpact-interview-questions-and-answers","tag-globallogic-india-pvt-ltd-interview-questions-and-answers","tag-ibm-interview-questions-and-answers","tag-indecomm-global-services-interview-questions-and-answers","tag-insertion-and-deletion-in-linked-list-in-data-structure","tag-java-linked-list-traversal","tag-linked-list-algorithm-in-data-structure","tag-linked-list-c","tag-linked-list-data-structure-in-c","tag-linked-list-data-structure-in-java","tag-linked-list-in-data-structure","tag-linked-list-in-data-structure-using-c","tag-linked-list-insertion","tag-linked-list-program-in-data-structure","tag-linked-lists-java","tag-mphasis-interview-questions-and-answers","tag-netapp-interview-questions-and-answers","tag-oracle-corporation-interview-questions-and-answers","tag-sap-labs-india-pvt-ltd-interview-questions-and-answers","tag-sapient-consulting-pvt-ltd-interview-questions-and-answers","tag-singly-linked-list-algorithm","tag-singly-linked-list-algorithm-in-data-structure","tag-singly-linked-list-c","tag-singly-linked-list-in-data-structure","tag-singly-linked-list-in-data-structure-program","tag-singly-linked-list-java","tag-singly-linked-list-program-in-c","tag-singly-linked-list-program-in-data-structure","tag-tech-mahindra-interview-questions-and-answers","tag-tracxn-technologies-pvt-ltd-interview-questions-and-answers","tag-types-of-linked-list","tag-types-of-linked-list-in-data-structure","tag-unitedhealth-group-interview-questions-and-answers","tag-what-is-linked-list-in-data-structure","tag-wipro-infotech-interview-questions-and-answers","tag-wm-global-technology-services-india-pvt-ltd-limited-wmgts-interview-questions-and-answers","tag-xoriant-solutions-pvt-ltd-interview-questions-and-answers","tag-yodlee-infotech-pvt-ltd-interview-questions-and-answers"],"yoast_head":"<!-- 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