Operating System (OS)
Trojan-Horse programs

do not usually work
usually are immediately discovered
are hidden programs that do not show up on the system
are legitimate programs that allow unauthorized access
None of these

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Operating System (OS)
You should choose sleep option when

When computer gets hanged frequently. Let it sleep for some time
You finish working and going to bed
The computer is tired after working for the whole day
You are leaving for a very short time and want to resume you work shortly

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

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

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