Penetration testing (also called pen testing) is the practice of testing a computer system, network, or Web application to find vulnerabilities that an attacker could exploit. Which of the following areas can be exploited in a penetration test?
Each correct answer represents a complete solution. Choose all that apply.

A.
Social engineering

B.
File and directory permissions

C.
Buffer overflows

D.
Kernel flaws

E.
Race conditions

F.
Information system architectures

G.
Trojan horses