Question: what are the different types of computer hackers?
Answer: 'Black Hat' Hackers. The term “black hat” originated from Western movies, where the bad guys wore black hats and the good guys wore white hats. ... 
'White Hat' Hackers. ... 
'Grey Hat' Hackers. ... 
Rootkits. ... 
Keyloggers. ... 
Vulnerability Scanner. ... 
SQL Injection Attack. ... 
Distributed Denial-of-Service (DDoS)