Operating System (OS)
A public key encryption system

None of these
allows only the correct receiver to decode the data
allows anyone to decode the transmission
allows only the correct sender to decode the data
does not encode the data before transmitting it

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Operating System (OS)
The CPU, after receiving an interrupt from an I/O device

None of these
hands over control of address bus and data bus to the interrupting device
halts for a predetermined time
branches off to the interrupt service routine immediately
branches off to the interrupt service routine after completion of the current instruction

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Operating System (OS)
You should choose sleep option when

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

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