IV B.Tech I Semester Supplimentary Examinations, May/Jun 2009 DISTRIBUTED OPERATING SYSTEMS (Computer Science & Systems Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. Explain the following design issues in distributed operating systems.
ld .
(a) Flexibility (b) Reliability
[16]
2. What is ATM? Explain ATM reference model in detail? (with a neat sketch) [16] 3. Explain the following implementation issues in RPC.
(b) Critical path
or
(a) RPC protocols
[6+10]
4. Explain the working of bully election algorithm by considering a group consists of ‘10’ processes. [16]
uW
5. (a) What is the difference between fail-silent faults and Byzantine faults? (b) What is the need of redundancy in fault tolerant systems? (c) What is the difference between synchronous versus asychronous systems? [5+6+5] 6. (a) What is a real time system? Explain. (b) What is the difference between soft and hard real time systems? (c) Explain TTP (time Triggered Protocol)?
[6+4+6]
nt
7. What is DSM? Explain the following shared memory multiprocessor in detail “Ring-Based Multiprocessors”
[16]
Aj
8. (a) Suppose that two variables A and B are both located by accident on the same page of a page-based DSM system. How ever both of them are unshared variables. Is false sharing possble? Explain (b) What happens if a Munin process modifies a shared variable outside a critical region? [8+8] ⋆⋆⋆⋆⋆
1 of 1
Set No. 2
Code No: RR411505
in
IV B.Tech I Semester Supplimentary Examinations, May/Jun 2009 DISTRIBUTED OPERATING SYSTEMS (Computer Science & Systems Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. Explain the following design issues in distributed operating systems. (a) Flexibility
[16]
ld .
(b) Reliability
2. (a) What is meant by an open system? Why are some systems not open?
(b) What is the difference between a connection oriented and connectionless communication protocol? [8+8]
(a) A centralized Algorithm (b) A Token Ring Algorithm
or
3. What is mutual exclusion? Explain the following Algorithms to implement mutual exclusion.
[16]
uW
4. A process with transaction timestamp 50 needs a resource held by a process with transaction timestamp 100. What happens is: (a) wait-die?
(b) would-wait?
[16]
5. (a) What is the difference between fail-silent faults and Byzantine faults? (b) What is the need of redundancy in fault tolerant systems?
nt
(c) What is the difference between synchronous versus asychronous systems? [5+6+5]
6. (a) What is a real time system? Explain. (b) What is the difference between soft and hard real time systems?
Aj
(c) Explain TTP (time Triggered Protocol)?
[6+4+6]
7. What is DSM? Explain the following shared memory multiprocessor in detail. “Switched Multiprocessors”
[16]
8. Explain the following object based DSM system by considering the factors like tuple space, operations on typles and implementation. [16] “Linda” ⋆⋆⋆⋆⋆ 1 of 1
Set No. 3
Code No: RR411505
in
IV B.Tech I Semester Supplimentary Examinations, May/Jun 2009 DISTRIBUTED OPERATING SYSTEMS (Computer Science & Systems Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. Explain the Hardware concepts related Distributed Operating Systems in detail? [16]
ld .
2. (a) What is meant by an open system? Why are some systems not open?
(b) What is the difference between a connection oriented and connectionless communication protocol? [8+8] 3. Explain the following clock synchronization Algorithms in detail.
(b) the Berkeley Algorithm
or
(a) Cristian’s Algorithm
[16]
4. Explain the working of bully election algorithm by considering a group consists of ‘10’ processes. [16]
uW
5. Explain the following Processor Allocation Algorithms in distributed OS? (a) A Graph-theoretic Deterministic Algorithm (b) A centralized Algorithm (c) A Bidding Algorithm
[6+6+4]
6. Explain the following in distributed file systems. (a) Caching
nt
(b) Cache consistency (c) Replication
[6+5+5]
7. (a) Define strict conssitency? Give examples for strictly consistent memory and not strictly consistent?
Aj
(b) Why is W(x)1 R(x)0 R(x)1 not legal for the following? P1 : w(x)1 P2 : R(x)0 R(x)
8. Explain the following DSM system by considering different factors like release consistency, protocols, directories and synchronization. [16] “MUNIN” ⋆⋆⋆⋆⋆
1 of 1
Set No. 4
Code No: RR411505
in
IV B.Tech I Semester Supplimentary Examinations, May/Jun 2009 DISTRIBUTED OPERATING SYSTEMS (Computer Science & Systems Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. Explain the following design issues in distributed operating systems.
(b) Reliability
ld .
(a) Flexibility
[16]
2. Explain layers, interfaces and protocols in the OSI model. (with a neat sketch). [16] 3. (a) What are the main problems in RPC?
or
(b) Explain group communication by considering any ssytem? (like ISIS) [6+10]
4. Explain the working of bully election algorithm by considering a group consists of ‘10’ processes. [16]
uW
5. (a) What is the difference between fail-silent faults and Byzantine faults? (b) What is the need of redundancy in fault tolerant systems? (c) What is the difference between synchronous versus asychronous systems? [5+6+5] 6. (a) What is the difference between a file service using the upload/download model and one using the remote access model? (b) Why do stateless severs have to include a fule offset in each request? Is this also needed for stateful servers? [8+8]
nt
7. What is DSM? Explain the following shared memory multiprocessor in detail. “NUMA Multiprocessors”
[16]
Aj
8. Explain the following object based DSM system by considering the factors like tuple space, operations on typles and implementation. [16] “Linda”
[8+8] · 3. What is mutual exclusion? Explain the following Algorithms to implement mutual · exclusion. (a) A centralized Algorithm · (b) A Token Ring Algorithm.
Define and derive the equation for the vorticity of a flow. Hence prove that ... out from the leading edge to the trailing edge of a symmetrical airfoil. (b) State and ...
Check whether the following impedance functions are LC, RL or RC? (a) Z(s) = ... amplitude 5 V. Find autocorrelation function and energy spectral density. [8+8].
How can you find virus concentration both directly and indirectly by particle counts · and measurement of infectious unit concentration. Define plaque forming ...
(b) Explain the role of super alloys and dispersion strengthed alloys for high tem- perature creep. 8. Explain the following N.D.T Processes. (a) Magnetic particle ...
All the ethane and propane produced is recycled as feed. The cost of feeds and products are as- sumed as follows: Feeds. Cost (Rs/kg) Products. Cost (Rs/kg).
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Explain constraint satisfaction with the help of a crypt arithmetic problem.[10+6] · 3. (a) Explain how the Herbrand's theorm forms the basis of resolution.
and on commercial vehicles? Does it vary from one vehicle to other. (b) Explain the semi floating. ... Describe its operation with the neat sketch. (b) Describe the ...
gear wheels are equal to one module, find ... ii. the angle of action of the pinion and the gear wheel ... Determine the number of teeth on all the wheels.
If input capacitance of the voltmeter is 4.5 pF and the lead capacitance is 1.5 · pF, determine the inductance and self capacitance of the coil. [8+8] · 4. (a) What is ...
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(Computer Science & Engineering) · Time: 3 hours ... [16] · 5. In what ways the Internet and the web improve logistics and supply chain manage- · ment? [16].
between bearing and shaft is filled with a lubricant having a viscosity 24 Pa-s, · what power will be required to overcome the viscous resistance when the shaft.
(c) Lubrication · [16] · 6. (a) Write two main differences between Hydrostatic and Hydrodynamic bearings. (b) Design a full hydrodynamic babbit bearing for a ...
(a) Differentiate between XML and HTML. (b) Differentiate between DHTML and VRML. [8+8] · 8. Write short notes on the following: · (a) Write about java Applets.
(a) In a nonmagnetic medium, E = 50cos(109t - 8x) ay + 40sin (109t - 8x) az · V/m, find the dielectric constant εr and the corresponding H. [8M] · (b) A conducting ...
(b) Discuss about Region growing by pixel aggregation. [10+6] ... (a) What is meant by connectivity among pixels? ... 8-connectivity with suitable examples.
(b) Explain with a neat block diagram the operation of a continuously variable .... (a) Draw the block diagram of band pass binary data transmission system and.
