Operating System (OS)
The most common security failure is

insufficient technology used to prevent breaches
carelessness by users
too much emphasis on preventing physical access
depending on passwords
None of these

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
The necessary conditions needed before deadlock can occur?

Mutual Exclusion, No Hold and wait, Preemption, Circular Wait
Mutual Exclusion, Hold and wait, Preemption, No Circular Wait
Mutual Exclusion, Hold and wait, No Preemption, Circular Wait
No Mutual Exclusion, Hold and wait, Preemption, Circular Wait

ANSWER DOWNLOAD EXAMIANS APP