Classical

Operating System - Protection

1:  

Trojan-Horse programs

A.

are legitimate programs that allow unauthorized access

B.

are hacker programs that do not show up on the system

C.

really do not usually work

D.

usually are immediately discovered

 
 

Option: A

Explanation :


2:  

Seeks analysis

A.

is used for analyzing paging problems

B.

is used for analyzing device busy problems

C.

is used for analyzing control-unit busy problems

D.

is only shown on real-time displays

 
 

Option: B

Explanation :


3:  

Link encryption

A.

is more secure than end-to-end encryption

B.

is less secure than end-to-end encryption

C.

cannot be used in a large network

D.

is used only to detect errors

 
 

Option: B

Explanation :


4:  

A long-term monitor

A.

should show any immediate performance problems

B.

should show I/O, paging, and processor activity

C.

need show only the I/O and processor activity

D.

usually reports only on terminal displays

 
 

Option: B

Explanation :


5:  

Device busy

A.

is good, since that means the device is in use

B.

is bad, since that means the device is not available

C.

is bad only if the device busy rate is too high

D.

depends upon the system paging rate

 
 

Option: C

Explanation :




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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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