Seminar Topics - Scholarships - Admission/Entrance Exam Notifications USA-UK-Australia-Germany-France-NewZealand Universities List Engineering-MBA-MCA-Medical-Pharmacy-B.Ed-Law Colleges Information www.andhracolleges.c om The Complete Information About Colleges in Andhra Pradesh www.andhracolleges.com Code No: RR410502 Set No. 1 IV B.T ec h I Semest er Regular Examinati ons , Nov ember 2007 DISTRIBUTED SYTEMS ( Common to Computer Science & Engineering and Electronics & Computer Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆ ⋆ ⋆ ⋆ ⋆ 1. (a) Define concurrency and paral lelism. What oppor tunities for parallelism arise in distributed client-server systems? (b) How can the design of a distri bute d system ensure that it will be scalable? [4+4+8] 2. Compare and explain times for Synchronous and Asynchronous Remote Procedure Calls with suitable diagrams. [8+8] 3. (a) Explai n the adv antag e of cop y-on-write region cop ying fo r UNIX, where a call to fork is typically followed by a call to exec. (b) What should happen if a region that has been copi ed using copy -on-write is itself copied? [8+8] 4. Explain about logical time and logical clocks. [8+8] 5. Explain how the conversation takes place between a client and a server in detail. [16] 6. Explain abou t two-phas e co mmit pr otocol fo r nested transaction. [1 6] 7. Explain log for banking service with relevant diagram. [10+6] 8. Summari ze the abstract io ns pr ovi de d by the Mach Kernel in de tail. [1 6] ⋆ ⋆ ⋆ ⋆ ⋆ 1 of 1
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