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Answer Java excersizes ([login to view URL] & Peer-to-Peer ) in a few paragraphs

Hello freelancers,

I attach some java questions on distr systems and peer to peer. I only need a few lines per answer and a java example where needed. The two subjects are really easy for someone with the required knowledge. The awarded freelancer should be fluent in English. Certifications and speed will be considered as a plus. The budget is $20-$25. 10 for each subject..

Thank you

Subject 1

Question 1 - Advantages / Disadvantages P2P Model

Please indicate three (3) advantages and two (2) disadvantages of peer nodes model with respect to the client / server model in terms of development Distributed System.

(1-2 lines per case)

Question 2 - Routing in the Pastry system

In a Pastry network node is searched with key 3012. We assume that the search starts at the "first node", which has no common prefix with the key. The first node searches the routing table and forwards the query to a "second node", which is closer to the key, but is not responsible for the key 3012. The 'third node "should be the node where the search achieves after the message from that promoted straight to the destination node. Fill in the routing tables of the three nodes and assign appropriate values ​​for the sheet sets. We assume that the network is dense enough to fill all the cells of the tables. PLEASE DOWNLOAD THE ATTACHED DOCX TO FILL IN THE 3 LITTLE TABLES

Subject 2

A distributed electronic voting system implements an interface Election which provides remote vote method which is defined by two parameters, the name of a candidate (string) and password of a voter (integer). Consider the following implementation of the vote to the server:

 void vote (String candidateName, int voterID) {

   boolean found = checkDoubleVote (voterID);

   if (! found)

      addRecord (voterID, candidateName);

}

Where checkDoubleVote () checks for double voting of voterID in a NW and addRecord () records the vote.

Assuming a multithreaded server of a processor that follows the architecture of one-thread-per-request, that is, each call remote vote () method is serviced by a different thread (even if we have simultaneous calls from the same voter-customer), reply to the following:

i) What problem can occur in the use of more distributed system? (at least one-two paragraphs explaining and java example if needed)

ii) Show an example the problem occurred. ( Some lines and an example)

iii) Suggest a solution to eliminate the problem. (Text and java example)

Evner: Engelsk(UK), Engelsk(USA), Engelsk Grammatik, Java, Software Arkitektur

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Om arbejdsgiveren:
( 124 bedømmelser ) Thessaloniki, Kalamaria, Greece

Projekt ID: #13187542

13 freelancere byder i gennemsnit €423 på dette job

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