Elaborate Hold and Wait as a deadlock prevention method?

Please provide the Information of deadlock prevention method "Hold and Wait"?
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"Hold and Wait : Whenever a process requests a resource, it does not hold any other resource. An alternative protocol allows a process to request resources only when the process has none. Source:"
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"Targeting the Maintain along with Wait Problem; Can an activity store a resource and ask for an additional? Can we demand processes to demand most resources at the same time? Almost all techniques will not statically know about the means they desire. "
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