Which of the following is NOT a valid deadlock prevention scheme?
Release all resources before requesting a new resource
Number the resources uniquely and never request a lower numbered resource than the last one requested
Never request a resource after releasing any resource
Request and all required resources be allocated before execution
An embedded object might appear in a document as
None of above
Which is not an external command?
None of the above
Which of following need a device driver ?
An operating system is known to be a layer of
There are 5 questions to complete.