Answer 1

these resources will help you
https://www.sololearn.com/discuss/262566/?ref=app
https://www.sololearn.com/discuss/563537/?ref=app
https://www.sololearn.com/Discuss/380375/?ref=app
https://www.sololearn.com/Discuss/889654/?ref=app

Answer 2

https://www.sololearn.com/Discuss/982383/according-to-you-tell-me-the-top-5-programming-languages-which-needs-in-hacking
https://www.sololearn.com/Discuss/931270/duplicate-which-programming-language-is-used-in-hacking
https://www.sololearn.com/Discuss/853388/duplicate-what-is-the-best-programming-language-to-hacking
https://www.sololearn.com/Discuss/801745/best-language-for-hacking
https://www.sololearn.com/Discuss/533630/what-is-best-language-for-hacking-and-how-i-can-a-hacker
https://www.sololearn.com/Discuss/419414/what-type-of-languages-does-these-hackers-know
https://www.sololearn.com/Discuss/298183/which-is-the-best-language-for-hacking
https://www.sololearn.com/Discuss/284853/hacking-language
https://www.sololearn.com/Discuss/112904/which-is-best-programming-language-for-hackers

Answer 3

In no specific order: Python, C/C++, Java, Perl, and LISP. Also, I recommend learning SQL if you’re interested in SQL injections.