few questions regarding sitemap file and duplicate links

Discussion in 'Black Hat SEO' started by zigzagtech, Jan 22, 2017.

  1. zigzagtech

    zigzagtech Regular Member

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    hello, members, i want to know something regarding sitemap file...
    as i know 50000 are links are allowed in google sitemap,
    sitemap max size 10 mb ..

    but ,

    if the sitemap contains 404 pages - like few pages has been deleted or absent
    what will be the effect ?


    if the sitemap conatains duplicate links , what will be the result ?
    will it hurt seo ranking ? will it cause derank ?

    thank you to guru's who will answere in advance !
    happy january !