[Solved] In a system using priority scheduling with aging to prevent starvation, what unexpected behavior might occur if a process holding a critical resource is preempted by an aged higher-priority process,... | Operating Systems

Operating Systems - Starvation vs Deadlock vs Livelock - Differences & Examples

In a system using priority scheduling with aging to prevent starvation, what unexpected behavior might occur if a process holding a critical resource is preempted by an aged higher-priority process, and how can this be mitigated?

ALivelock will occur due to continuous priority changes; mitigation involves fixed priorities.

BDeadlock will occur immediately; mitigation requires disabling aging.

CPriority inversion may occur, delaying the critical resource release; mitigation involves priority inheritance protocols.

DStarvation will worsen for low-priority processes; mitigation involves removing aging.

Step-by-Step Solution

Step 1: Identify the problem
When a low-priority process holding a critical resource is preempted by a higher-priority process (due to aging), priority inversion can occur because the resource holder cannot proceed to release the resource.
Step 2: Understand mitigation
Priority inheritance protocols temporarily raise the priority of the resource-holding process to prevent inversion and reduce blocking time.
Step 3: Analyze options
Priority inversion may occur, delaying the critical resource release; mitigation involves priority inheritance protocols correctly identifies priority inversion and its mitigation. Deadlock will occur immediately; mitigation requires disabling aging incorrectly claims deadlock occurs immediately and suggests disabling aging, which is not a solution. Livelock will occur due to continuous priority changes; mitigation involves fixed priorities confuses livelock with priority changes. Starvation will worsen for low-priority processes; mitigation involves removing aging incorrectly states starvation worsens and suggests removing aging, which would increase starvation risk.
Final Answer:
Option C -> Option C
Quick Check:
Priority inversion + priority inheritance = correct diagnosis and fix.

Quick Trick: Priority inversion = resource holder preempted; fix with inheritance

Common Mistakes:

MISTAKES

Confusing priority inversion with deadlock
Thinking aging always prevents all scheduling issues

Trap Explanation:

PITFALL

Options B and D are tempting because they suggest disabling aging, but aging is needed to prevent starvation. Option C correctly identifies priority inversion and its mitigation.

Interviewer Note:

CONTEXT

Tests deep understanding of priority scheduling, aging, and priority inversion interactions.

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More Operating Systems Quizzes

In a system using priority scheduling with aging to prevent starvation, what unexpected behavior might occur if a process holding a critical resource is preempted by an aged higher-priority process, and how can this be mitigated?

Step 1: Identify the problem

Step 2: Understand mitigation

Step 3: Analyze options

Final Answer:

Quick Check:

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