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Answer:
This type of malware are called Polymorphic Malware.
Answer:Mechanism and policy is defined for the operating system while designing.This policy is states that the mechanisms that are to be executed should not be overly resist the policies that make the judgement for the operation or function to execute in system.
Separation should be present in the mechanism and policy because it helps in making the system flexible and can be easily modified.Clarity between the interface of policy and mechanism causes low effect towards system while the policy changes.
In a stateless connection, each transmission is independent, no continuous connection is maintained. Stateless system is a problem for shopping cart software because it does not keep information from one transmission or session to another, thus shopping cart must store information about specific shoppers and their purchases.