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Explain the concept of deadlock
Yes. It can direct to deadlock. Suppose that a batch of frames arrived correctly and were accepted. Then receiver will advance its window. Now suppose that all acknowledgements were lost. The sender will eventually time out and send first frame again. The receiver will send a NAK. Suppose that this was lost. From that point on, sender would keep timing out and sending a frame which had already been accepted, but receiver will just ignore it. Setting auxiliary timer results in the correct acknowledgement being sent back finally instead, which resynchronizes
#question.explain diversity and magnitude of organic compounds and general properties?
explain the mapping constraints
Describe the GRANT function and explain, how it associates to security. What kind of privileges may be granted? How are they revoked? Ans: Since more than one user can aacce
What is a Phantom Deadlock? In distributed deadlock detection, the delay in propagating local information might cause the deadlock detection algorithms to recognize deadlocks
Normal 0 false false false EN-US X-NONE X-NONE
atient(PNumber, Name, NHS_no, Amount_due, DNO, Doctor, Medical_Treatment), relation of schema Staff(StaffNum, Name, DNO, Task) and relation of schema Dept(DNO, Name, Location, Dire
why are older data models are being replaced by new data models
Describe Participation Constraints? Participation Constraints - The participation constraint exacts whether the existence of an entity depends on its being related to another
Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4
What is the aim of logical schema ? The main motive of the logical schema is to ensure the portability of procedures and models on various physical schemas at runtime.
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