How does a server know that one of his remote objects provided by him is no longer used by clients and can be collected? How does Java RMI handle this problem and what alternatives are there?What is the purpose of an Interface Definition Language? Why does CORBA not just use the Java interface construct?Two remote objects are related and should be updated in one operation. What kind of service do you need for this if you assume that both objects can be on different systems and that multiple operations can happen concurrently?The Lookup operation performs a single-level lookup, returning the Unique File Identifier (UFID) corresponding to a given simple name in a specified directory. What is Network File System deviate from one-copy file update semantics? Why should UFID be unique across all possible file systems?Write a simple java program to implement RMI.

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Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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How does a server know that one of his remote objects provided by him is no longer used by clients and can be collected? How does Java RMI handle this problem and what alternatives are there?
What is the purpose of an Interface Definition Language? Why does CORBA not just use the Java interface construct?
Two remote objects are related and should be updated in one operation. What kind of service do you need for this if you assume that both objects can be on different systems and that multiple operations can happen concurrently?
The Lookup operation performs a single-level lookup, returning the Unique File Identifier (UFID) corresponding to a given simple name in a specified directory. What is Network File System deviate from one-copy file update semantics? Why should UFID be unique across all possible file systems?
Write a simple java program to implement RMI.

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