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

Process Synchronization & Semaphores question bank (Operating Systems)

Practice 6 free GATE & PSUs - Computer Science & Information Technology (CS & IT) Operating Systems - Process Synchronization & Semaphores questions with answers and step-by-step solutions.

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Q1.

[Process Synchronization & Semaphores Concept 2] 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.

[Process Synchronization & Semaphores Concept 8] 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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