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
None of these
decides correct alternative by analysing several ones
multiplexes the inputs and updates the memory accordingly

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
The advantage of a command processor running only built-in commands is:

the processing is much faster than would other-wise be the case when user defined commands are used
flexibility to the users in running lists of commands by simply collecting them in named batch command files
None of these
users can create system programs and run them as commands
the command set being common across different hardware configurations

ANSWER DOWNLOAD EXAMIANS APP