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{"id":491,"date":"2021-07-13T15:22:24","date_gmt":"2021-07-13T15:22:24","guid":{"rendered":"https:\/\/www.wikitechy.com\/interview-questions\/?p=491"},"modified":"2021-09-13T07:13:19","modified_gmt":"2021-09-13T07:13:19","slug":"difference-between-stack-and-heap","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/interview-questions\/data-structure\/difference-between-stack-and-heap\/","title":{"rendered":"Difference between Stack and Heap ?"},"content":{"rendered":"<div class=\"TextHeading\">\n<div class=\"hddn\">\n<h2 id=\"difference-between-stack-and-heap\" class=\"color-pink\">Difference between Stack and Heap ?<\/h2>\n<\/div>\n<\/div>\n<div class=\"Content table-responsive\">\n<div class=\"hddn\">\n<table class=\"table-bordered table-striped table table-responsive\">\n<tbody>\n<tr>\n<th>Stack<\/th>\n<th>Heap<\/th>\n<\/tr>\n<tr>\n<td class=\"text-leftalign\">Stack has very fast to access.<\/td>\n<td class=\"text-leftalign\">Heap has slower to access while compared to stack.<\/td>\n<\/tr>\n<tr>\n<td class=\"text-leftalign\">Limit on stack size depends<br \/>\non OS.<\/td>\n<td class=\"text-leftalign\">No limit on memory size.<\/td>\n<\/tr>\n<tr>\n<td class=\"text-leftalign\">Stack variables cannot be resized.<\/td>\n<td class=\"text-leftalign\">Heap variables can be resized using realloc() method.<\/td>\n<\/tr>\n<tr>\n<td class=\"text-leftalign\">In Stack,space is managed efficiently by CPU,<br \/>\nmemory will not become fragmented.<\/td>\n<td class=\"text-leftalign\">There is no guaranteed efficient use of space, memory may become fragented over time as blocks of memory are allocated, then freed.<\/td>\n<\/tr>\n<tr>\n<td class=\"text-leftalign\">Manage memory during allocating and freeing variables.<\/td>\n<td class=\"text-leftalign\">Don&#8217;t have to explicitly de-allocate variables.<\/td>\n<\/tr>\n<tr>\n<td class=\"text-leftalign\">Stack to accessed only local variables.<\/td>\n<td class=\"text-leftalign\">Heap variables can be accessed globally.<\/td>\n<\/tr>\n<tr>\n<td class=\"text-leftalign\">Stack memory is used only by<br \/>\none thread of execution.<\/td>\n<td class=\"text-leftalign\">Heap memory is used by all the parts of the application<\/td>\n<\/tr>\n<tr>\n<td class=\"text-leftalign\">The stack is always reserved<br \/>\nin a LIFO order, the most recently reserved block<br \/>\nis always the next block to be freed.<\/td>\n<td class=\"text-leftalign\">Element of the heap have no dependencies with each other and can always be accessed randomly at any time.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\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\/difference-between-stack-and-heap.png\" alt=\" Difference Between Stack and Heap\" \/><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Answer : Stack has very fast to access&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"passster_activate_protection":false,"passster_protect_child_pages":"","passster_protection_type":"password","passster_password":"","passster_activate_overwrite_defaults":"","passster_headline":"","passster_instruction":"","passster_placeholder":"","passster_button":"","passster_id":"","passster_activate_misc_settings":"","passster_redirect_url":"","passster_hide":"no","passster_area_shortcode":"","gtb_hide_title":false,"gtb_wrap_title":false,"gtb_class_title":"","gtb_remove_headerfooter":false,"footnotes":""},"categories":[3028],"tags":[195,971,15897,491,221,368,3387,3389,203,199,214,198,363,3057,3405,205,3390,3399,3381,3379,3380,3383,222,484,3054,3404,3392,3402,3398,196,212,3393,3391,207,366,204,206,972,3400,3385,3384,3394,3341,3401,3322,3339,3407,3397,3403,3382,3388,3386,200,3055,197,3406,3395,3396,968,3056,285,969],"class_list":["post-491","post","type-post","status-publish","format-standard","hentry","category-data-structure","tag-accenture-interview-questions-and-answers","tag-altimetrik-india-pvt-ltd-interview-questions-and-answers","tag-apostek-software-interview-questions-and-answers","tag-applied-materials-interview-questions-and-answers","tag-bharti-airtel-interview-questions-and-answers","tag-bmc-software-interview-questions-and-answers","tag-c-heap-data-structure","tag-c-stack-allocation","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-collabera-te-interview-questions-and-answers","tag-define-heap","tag-dell-international-services-india-pvt-ltd-interview-questions-and-answers","tag-difference-between-heap-and-stack-in-java","tag-difference-between-stack-and-heap","tag-difference-between-stack-and-heap-allocation","tag-difference-between-stack-and-heap-in-c","tag-difference-between-stack-and-heap-in-java","tag-difference-between-static-stack-and-heap-allocation-in-compiler-design","tag-flipkart-interview-questions-and-answers","tag-genpact-interview-questions-and-answers","tag-globallogic-india-pvt-ltd-interview-questions-and-answers","tag-heap-definition","tag-heap-meaning","tag-heap-size","tag-how-much-is-a-stack","tag-ibm-interview-questions-and-answers","tag-indecomm-global-services-interview-questions-and-answers","tag-java-heap","tag-java-stack","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-stack-and-heap","tag-stack-and-heap-in-c-msdn","tag-stack-and-heap-in-ios","tag-stack-class","tag-stack-definition","tag-stack-heap","tag-stack-in-data-structure","tag-stack-program","tag-stack-size","tag-stack-storage","tag-stack-vs-heap","tag-stack-vs-heap-c","tag-stack-vs-heap-data-structure","tag-string-stored-in-heap-or-stack-in-c","tag-tech-mahindra-interview-questions-and-answers","tag-tracxn-technologies-pvt-ltd-interview-questions-and-answers","tag-unitedhealth-group-interview-questions-and-answers","tag-what-does-heap-mean","tag-what-is-heap","tag-what-is-stack","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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