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Question:
(a) Briefly discuss and describe the possible RMI invocation semantics.
(b) (i) What is data marshaling?
(ii) Explain the role of a remote object reference during marshaling and unmarshalling, at both clients and servers, in an RMI system.
(iii) By using examples, distinguish between a local method invocation and a remote method invocation.
(c) Explain the benefits of middleware to distributed systems programmers, providing an example for each benefit.
(d) What are stub and skeleton and why are they needed in remote procedure calls?
Q. Consider a distributed system with two sites A and B. Consider whether site A can distinguish among the following: a. B goes down. b. The link between A and B goes down.
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Q. Likewise some systems support many types of structures for a file's data while others simply support a stream of bytes. What are the merits in addition to demerits? Answer:
Explain the basic concepts of segmentation. Segmentation definition User view of program Hardware used with diagram-segment table, base, limit & offset Protection and
basic advantage of using interrupt initiated data transfer over transfer under program control without an interrupt
simulate hole allocating ahogrithm
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In the mean while the fork() system call the Kernel creates a copy of the parent process's address space and adds it to the child process. But the vfork() system call do no
Q. Describe the concept of transaction atomicity? Answer: A transaction is a sequence of read as well as writes operations upon some data followed by a commit operation. If the
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