A hacker could obtain passwords without the use of computer tools or programs through the technique of:
A.
social engineering.
B.
sniffers.
C.
back doors.
D.
Trojan horses.
Explanation:
Social engineering is based on the divulgence of private information through dialogues, interviews, inquiries, etc., in which a user may be indiscreet regarding their or someone else’s personal datA . A sniffer is a computer tool to monitor the traffic in networks. Back doors are computer programs left by hackers to exploit vulnerabilities. Trojan horses are computer programs that pretend to supplant a real program; thus, the functionality of the program is not authorized and is usually maliciousin nature.