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Operating Systems
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Course Name
BSc IT (Bachelor of Science in Information Technology)
Subject Code BT0070 (Operating Systems )
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PART - A
PART - B
PART - C
Subject : Operating Systems
BT0070 : PART - B
| Q. 1 | Binary semaphores can assume only the
value ___ and ___ whereas counting
semaphores can assume only ____ values.
|
| | A) | 0, 1 and nonpositive |
| B) | 0, 1 and nonnegative | | C) | P, V and nonpositive | | D) | P, V and nonnegative | | | | | Q. 2 | ________ is a protected variable whose
value can be accessed and altered only by the
operations P and V |
| | A) | metaphore |
| B) | semaphore | | C) | teraphore | | D) | none of the above | | | | | Q. 3 | Methods for dealing with deadlock problem
is
a. use a protocol to ensure that the system will
never enter a deadlock state
b. allow the system to enter a deadlock state
and then recover
c. ignore the problem |
| | A) | only a & b |
| B) | only b & c | | C) | only a & c | | D) | All the above | | | | | Q. 4 | The value for next CPU burst is predicted
by the following equation |
| | A) | T(n+1) = atn + (1 – a )Tn |
| B) | T(n+1) = aTn + (1 – a )Tn | | C) | T(n+1) = atn + (1 – a )tn | | D) | T(n+1) = aTn + (1 – a )tn | | | | | Q. 5 | Linux implementation is adherent to ____
and uses ____ |
| | A) | POXIS; non proprietary code |
| B) | IEEE; GNU Project | | C) | POSIX; binary code | | D) | IEEE; proprietary code | | | |
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