Which of the following techniques delete the files permanently?

Diskcopy is:

Which of the following tools will allow a forensic Investigator to acquire the memory dump of a suspect machine so that It may be Investigated on a forensic workstation to collect evidentiary data like processes and Tor browser artifacts?

What is the purpose of using Obfuscator in malware?

Data is striped at a byte level across multiple drives, and parity information is distributed among all member drives.

What RAID level is represented here?