Amazon OA | C++

Hi, i recieved my email to take part 2 of the amazon intern OA which includes 2 coding questions and workstyles.
does anyone know what version of c++ it will be in? (for the first part of debuging they said in the email it will be gcc 8 but when i started the test it said it was gcc 4.5)
i did most of my recent coding in c++ here on leetcode which if i am not mistaken is fairly recent. one of the things i noticed here on leetcode is you would get an "arr" as a vector which makes life easier, and at the amazon OA demo it was more like "c ctyle".
how would this effect me?
Thank you

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