Coffman Necessary Conditions List-I (Condition) A. Mutual Exclusion B. Hold and Wait C. No Preemption D. Circular Wait List-II (System Structural State) At least one resource must be held in a non-sharable mode A process must hold resources while waiting for additional allocations Resources cannot be forcibly taken from a process holding them A closed chain of processes exists, where each waits for the next

A-1, B-2, C-3, D-4 Explanation: A. Mutual Exclusion -> 1. At least one resource must be held in a non-sharable mode Mutual exclusion condition yeh kehti hai ki kam se kam ek resource non-sharable mode me hold honi chahiye, yaani ek time par sirf ek hi process us resource ko access kar sakta hai. B. Hold and Wait -> 2. A process must hold resources while waiting for additional allocations Hold and Wait condition tab hoti hai jab ek process already kuch resources hold karke rakhta hai aur naye (additional) resources ke allocate hone ka wait kar raha hota hai. C. No Preemption -> 3. Resources cannot be forcibly taken from a process holding them No Preemption ka matlab hai ki kisi process se resources ko forcibly (jabrasti) nahi chhina ja sakta; process apne aap kaam khatam karke hi resource release karta hai. D. Circular Wa

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CUET PG 2026 — operating system os PYQ

CUET PG | operating system os | 2026

Coffman Necessary Conditions

List-I (Condition)

A. Mutual Exclusion

B. Hold and Wait

C. No Preemption

D. Circular Wait

List-II (System Structural State)

At least one resource must be held in a non-sharable mode
A process must hold resources while waiting for additional allocations
Resources cannot be forcibly taken from a process holding them
A closed chain of processes exists, where each waits for the next

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