{"id":309,"date":"2021-07-12T19:45:16","date_gmt":"2021-07-12T19:45:16","guid":{"rendered":"https:\/\/www.wikitechy.com\/interview-questions\/?p=309"},"modified":"2021-09-14T06:23:08","modified_gmt":"2021-09-14T06:23:08","slug":"pick-out-the-odd-one-out-of-the-following-malloc-calloc-free-realloc","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/interview-questions\/c\/pick-out-the-odd-one-out-of-the-following-malloc-calloc-free-realloc\/","title":{"rendered":"Pick out the odd one out of the following malloc(), calloc(), free(), realloc() ?"},"content":{"rendered":"
\n
\n

Pick out the odd one out of the following malloc(), calloc(), free(), realloc() ?<\/h2>\n<\/div>\n<\/div>\n
\n
\n
    \n
  • free()<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
    \n

    Explanation:<\/h2>\n<\/div>\n
    \n
    \n
      \n
    • Here malloc(), calloc(), realloc() are the memory allocation function. whereas free() is used to free the memory which is allocated by the above function.<\/li>\n
    • so the free() is odd term.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
      \n
      \n

      malloc()<\/h2>\n<\/div>\n<\/div>\n
      \n
      \n
        \n
      • The function malloc() reserves a block of memory of specified size and return a pointer of type void which can be casted into pointer of any form.<\/li>\n
      • It allocates single block of memory<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
        <\/div>\n
        \n
        \n

        calloc()<\/h2>\n<\/div>\n<\/div>\n
        \n
        \n
          \n
        • calloc() allocates multiple blocks of memory each of same size and sets all bytes to zero.<\/li>\n
        • It allocates space for an array elements, initializes to zero and then returns a pointer to memory.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
          \n
          \n

          realloc()<\/h2>\n<\/div>\n<\/div>\n
          \n
          \n
            \n
          • If suppose we assigned more or less memory than required, then we can change the size of the previously assigned memory space using realloc.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
            \n
            \n

            free()<\/h2>\n<\/div>\n<\/div>\n
            \n
            \n
              \n
            • The function free is used to deallocate or free the memory after the program finishes which was dynamically allocated in the program.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

              Answer : free()..<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1716],"tags":[1739,491,1740,211,1725,1728,1717,1726,1737,1733,203,199,214,198,363,209,205,1745,1738,1723,1720,1730,1719,1721,1722,1743,1735,222,1734,1727,1747,196,212,1731,1718,1724,710,207,366,204,217,288,1744,1729,1736,483,206,1741,1742,1746,15831],"class_list":["post-309","post","type-post","status-publish","format-standard","hentry","category-c","tag-accentur-interview-questions-and-answers","tag-applied-materials-interview-questions-and-answers","tag-asian-paints-ltd-interview-questions-and-answers","tag-bosch-india-software-interview-questions-and-answers","tag-c-memory-allocation-using-malloc","tag-c-programming-language-functions-malloc","tag-calloc-and-malloc-in-c","tag-calloc","tag-calloc-versus-malloc","tag-calloc-versus-mallocdifference-between-malloc","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-technologies-interview-questions-and-answers","tag-dell-international-services-india-pvt-ltd-interview-questions-and-answers","tag-dhfl-pramerica-life-insurance-company-ltd-interview-questions-and-answers","tag-difference-between-malloc","tag-difference-between-malloc-and-calloc-in-c","tag-dynamic-memory-allocation-in-c","tag-dynamic-memory-allocation-in-c-learn-to-use-calloc","tag-dynamic-memory-allocation-in-c-example","tag-dynamic-memory-allocation-in-c-programming-examples","tag-dynamic-memory-allocation-in-data-structure","tag-elico-healthcare-services-ltd-interview-questions-and-answers","tag-explain-malloc","tag-flipkart-interview-questions-and-answers","tag-free-and-realloc-functions","tag-free-realloc","tag-hcl-technol-interview-questions-and-answers","tag-ibm-interview-questions-and-answers","tag-indecomm-global-services-interview-questions-and-answers","tag-malloc","tag-malloc-calloc-realloc","tag-malloc-vs-calloc-vs-realloc","tag-mavenir-interview-questions-and-answers","tag-mphasis-interview-questions-and-answers","tag-netapp-interview-questions-and-answers","tag-oracle-corporation-interview-questions-and-answers","tag-peoplestrong-interview-questions-and-answers","tag-r-systems-interview-questions-and-answers","tag-raqmiyat-information-technologies-pvt-ltd-interview-questions-and-answers","tag-realloc","tag-realloc-and-free-in-c-languagec-dynamic-memory-allocation","tag-reliance-industries-ltd-interview-questions-and-answers","tag-sap-labs-india-pvt-ltd-interview-questions-and-answers","tag-tata-aia-life-insurance-interview-questions-and-answers","tag-tech-mahindr-interview-questions-and-answers","tag-the-linde-group-interview-questions-and-answers","tag-zenq-interview-questions-and-answers"],"yoast_head":"\nPick 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