Consider the following policies for preventing deadlock in a system with mutually exclusive resources: 1. Processes acquire all their resources at the beginning of execution. If any resource is not available, all acquired resources are released. 2. The resources are numbered uniquely. Processes can only request resources in increasing resource numbers. 3. The resources are numbered uniquely. Processes can only request resources in decreasing resource numbers. 4. The resources are numbered uniquely. Processes can only request a resource with a resource number larger than its currently held resource. Question: Which of the above policies can be used for preventing deadlock?   Group of answer choices 1)The resources are numbered uniquely. Processes can only request resources in decreasing resource numbers 2)The resources are numbered uniquely. Processes can only request resources in increasing resource numbers 3)The resources are numbered uniquely. Processes can only request a resource with a resource number larger than its currently held resource 4)Processes acquire all their resources at the beginning of execution. If any resource is not available, all acquired resources are released 5) all of the above

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Consider the following policies for preventing deadlock in a system with mutually exclusive resources: 1. Processes acquire all their resources at the beginning of execution. If any resource is not available, all acquired resources are released. 2. The resources are numbered uniquely. Processes can only request resources in increasing resource numbers. 3. The resources are numbered uniquely. Processes can only request resources in decreasing resource numbers. 4. The resources are numbered uniquely. Processes can only request a resource with a resource number larger than its currently held resource.
Question: Which of the above policies can be used for preventing deadlock?

 

Group of answer choices
1)The resources are numbered uniquely. Processes can only request resources in decreasing resource numbers
2)The resources are numbered uniquely. Processes can only request resources in increasing resource numbers
3)The resources are numbered uniquely. Processes can only request a resource with a resource number larger than its currently held resource
4)Processes acquire all their resources at the beginning of execution. If any resource is not available, all acquired resources are released
5) all of the above
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