Deadlock Prevention Protocols List-I (Target Condition) A. Prevent Hold & Wait B. Prevent No Preemption C. Prevent Circular Wait D. Prevent Mutual Exclusion List-II (Prevention Enforcement Rule) Process must request and receive all resources before execution begins If a process is denied a request, it must release all its current resources Imposes a global, linear ordering on all resources to prevent cycles Spools devices (like printers) so resources can be shared asynchronously

A-1, B-2, C-3, D-4 Explanation: A. Prevent Hold & Wait -> 1. Process must request and receive all resources before execution begins Hold & Wait ko prevent karne ke liye protocol yeh rule impose karta hai ki process execution start karne se pehle apne sabhi required resources ek saath request aur allocate karwaye. B. Prevent No Preemption -> 2. If a process is denied a request, it must release all its current resources No Preemption condition ko invalidate karne ke liye, agar kisi process ka naya resource request deny ho jata hai, to usse apne pehle se held sabhi resources ko forcibly release (preempt) karna padta hai. C. Prevent Circular Wait -> 3. Imposes a global, linear ordering on all resources to prevent cycles Circular Wait ko eliminate karne ke liye sabhi resources par ek global, linear ordering assigned ki jaati

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CUET PG 2026 — operating system os PYQ

CUET PG | operating system os | 2026

Deadlock Prevention Protocols

List-I (Target Condition)

A. Prevent Hold & Wait

B. Prevent No Preemption

C. Prevent Circular Wait

D. Prevent Mutual Exclusion

List-II (Prevention Enforcement Rule)

Process must request and receive all resources before execution begins
If a process is denied a request, it must release all its current resources
Imposes a global, linear ordering on all resources to prevent cycles
Spools devices (like printers) so resources can be shared asynchronously

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