46. The advantage of a command processor running only built-in commands is:
A. flexibility to the users in running lists of commands by simply collecting them in named batch command files
B. the command set being common across different hardware configurations
C. users can create system programs and run them as commands
D. the processing is much faster than would otherwise be the case when user defined commands are used
E. None of the above
47. Under multiprogramming, turnaround time for short jobs is usually _____ and that for long jobs is slightly_____.
A. lengthened; shortened
B. shortened; lengthened
C. shortened; shortened
D. lengthened; lengthened
E. None of the above
48. The most common systems security method is
A. passwords
B. encryption
C. firewall
D. all of the above
E. None of the above
49. Two basic types of operating systems are:
A. sequential and direct
B. batch and timesharing
C. sequential and realtime
D. batch and interactive.
E. None of the above
50. Daisy chain is a device for
A. connecting a number of controllers to a device
B. connecting a number of devices to a controller
C. interconnecting a number of devices to a number of controllers
D. all of the above
E. None of the above
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