GATE & PSUs - Computer Science & Information Technology (CS & IT)

File Systems & Disk Scheduling question bank (Operating Systems)

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Q1.

[File Systems & Disk Scheduling Concept 6] Consider three processes $P_1, P_2, P_3$ sharing two resources $R_1, R_2$ with single instances each. Under which condition can a deadlock state occur?

(A)

Mutual exclusion, Hold and wait, No preemption, and Circular wait all hold simultaneously.

(B)

Processes request resources only in strictly increasing numeric order of resource indices.

(C)

Preemption of allocated resources is dynamically permitted by the OS scheduler.

(D)

The resource allocation graph is bipartite and completely cycle-free.

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Q2.

[File Systems & Disk Scheduling Concept 12] Consider three processes $P_1, P_2, P_3$ sharing two resources $R_1, R_2$ with single instances each. Under which condition can a deadlock state occur?

(A)

Mutual exclusion, Hold and wait, No preemption, and Circular wait all hold simultaneously.

(B)

Processes request resources only in strictly increasing numeric order of resource indices.

(C)

Preemption of allocated resources is dynamically permitted by the OS scheduler.

(D)

The resource allocation graph is bipartite and completely cycle-free.

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