Operating System MCQs

1019 MCQs  (Page 53 of 102)

Attempt Operating System Quiz
A system is in a safe state only if there exists a ____________
A. Safe allocation
B. Safe resource
C. Safe sequence
D. All of the mentioned
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All unsafe states are ____________
A. Deadlocks
B. Not deadlocks
C. Fatal
D. None of the mentioned
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A system has 12 magnetic tape drives and 3 processes : P0, P1, and P2. Process P0 requires 10 tape drives, P1 requires 4 and P2 requires 9 tape drives. advertisement Process P0 P1 P2 Maximum needs (process-wise: P0 through P2 top to bottom) 10 4 9 Currently allocated (process-wise) 5 2 2 Which of the following sequence is a safe sequence?
A. P0, p1, p2
B. P1, p2, p0
C. P2, p0, p1
D. P1, p0, p2
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If no cycle exists in the resource allocation graph ____________
A. Then the system will not be in a safe state
B. Then the system will be in a safe state
C. All of the mentioned
D. None of the mentioned
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The resource allocation graph is not applicable to a resource allocation system ____________
A. With multiple instances of each resource type
B. With a single instance of each resource type
C. Single & multiple instances of each resource type
D. None of the mentioned
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The Banker’s algorithm is _____________ than the resource allocation graph algorithm.
A. Less efficient
B. More efficient
C. Equal
D. None of the mentioned
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The data structures available in the Banker’s algorithm are ____________
A. Available
B. Need
C. Allocation
D. All of the mentioned
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The content of the matrix Need is ____________
A. Allocation €? available
B. Max €? available
C. Max €? allocation
D. Allocation €? max
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A system with 5 processes P0 through P4 and three resource types A, B, C have A with 10 instances, B with 5 instances, and C with 7 instances. At time t0, the following snapshot has been taken: Process P0 P1 P2 P3 P4 Allocation (process-wise : P0 through P4 top TO bottom) A B C 0 1 0 2 0 0 3 0 2 2 1 1 0 0 2 MAX (process-wise: P0 through P4 top TO bottom) A B C 7 5 3 3 2 2 9 0 2 2 2 2 4 3 3 Available A B C 3 3 2 The sequence <P1, P3, P4, P2, P0> leads the system to ____________
A. An unsafe state
B. A safe state
C. A protected state
D. A deadlock
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CPU fetches the instruction from memory according to the value of ____________
A. Program counter
B. Status register
C. Instruction register
D. Program status word
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Word of the Day
13 Jul
Debunk
expose the falseness or hollowness of (an idea or belief).
بے نقاب کرنا، پول کھولنا

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