Operating System (OS)
The main function of the dispatcher (the portion of the process scheduler) is

suspending some of the processes when the CPU load is high
bring processes from the disk to the main memory
swapping a process to the disk
assigning ready process to the CPU
None of these

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Operating System (OS)
The term 'polling' in a computer means a process by which a computer system

detects/corrects errors
inquires to see if a terminal has any transaction to send
decides correct alternative by analysing several ones
None of these
multiplexes the inputs and updates the memory accordingly

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

branches off to the interrupt service routine immediately
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 after completion of the current instruction

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