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6:  

A long-term process display should

A.

show which processes used the most processor time
B.

show process activity by time interval
C.

show resources used by the most active processes
D.

all of these
 
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Option: D

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7:  

Control-unit busy

A.

is the same as device busy
B.

shows the availability of the path of devices
C.

can be prevented with more devices
D.

can be prevented by reducing the paging rate
 
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Option: B

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8:  

Global locks

A.

synchronize access to local resources
B.

synchronize access to global resources
C.

are used to avoid local locks.
D.

prevent access to global resources
 
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Option: B

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9:  

Real-time displays

A.

are used only for capacity planning
B.

are most useful for showing performance problems
C.

are useless for capacity planning
D.

cannot show the system paging rate
 
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Option: B

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10:  

A major security problem for operating system is

A.

authentication problem
B.

physical problem
C.

human problem
D.

none of these
 
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Option: A

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Syllabus covered in this section is-

  • Main functions of operating systems
  • Multiprogramming, multiprocessing and multitasking
  • Memory Management- Virtual memory, paging, fragmentation
  • Concurrent Processing: Mutual exclusion, Critical regions, locks and unlock.
  • Scheduling: CPU scheduling. I/O scheduling, Resource scheduling
  • Deadlock and scheduling algorithms.
  • Banker's algorithm for deadlock handling.

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