Code No.410553 IV-B.Tech. I-Semester Supplementary Examinations, May 2003
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ADVANCED OPERATING SYSTEMS (Common to Computer Science and Engineering, Computer Science and Information Technology) Time: 3 Hours Max. Marks: 70 Answer any FIVE questions All questions carry equal marks. --1.a) Give the taxonomy of parallel and distributed computer systems. What are the disadvantages of distributed systems? b) What are all the design issues in client-server model? Discuss about any two of them. Does using timestamping for concurrency control ensure serializability? Discuss. Write the ring algorithm for electing a coordinator.
3.a)
Suppose that an operating system does not have anything like the SELECT system call to see in advance if it is safe to read from a file, pipe, or device, but it does allow alarm clocks to be set that interrupt blocked system calls. Is it possible to implement a threads package in user space under these conditions? Discuss. Give the steps of a registry-based algorithm for finding and using idle workstations.
4.a) b) 5.a) b)
The basis of all communication in Mach is a port. What are all the details maintained in a port data structure and explain the significance of each field? Explain the directory service in DCE. How the serves are involved in name lookup to invoke one another? A condition variable in DCE is always associated with a mutex. Why? Mach supports the concept of a processor set. On what class of machines does this concept make the most sense? What is it used for? In the writeahead log, both the old and new values are stored in the log entries. Is it not adequate just to store the new value? What good is the old one?
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6.a) b)
With reference to distributed file system implementation explain i) Replication and ii) Update protocols. Discuss object-based distributed shared memory.
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2.a) b)
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Discuss about group Communication. Explain about security service in DCE.
8.
Write short notes on: a) Dead locks in distributed systems. b) Threads. @@@@@
b) Give the steps of a registry-based algorithm for finding and using idle · workstations. 4.a) With reference to distributed file system implementation explain i) ...
starter, (iii) Auto transformer starter limiting the supply line starting current to · twice the full-load value. Find the auto-transformer tapping in this case. - - -.
1.a) Explain with a neat sectional view the operation and advantages of hot blast · cupola. b) Discuss the various types of refractories used for cupola lining.
5.a) What is sine bar. Sketch an arrangement for any one of the applications. b) Describe the constructional features and working of optical collimator.
Polynomials in single variable are stored in the form of linked lists. Each · structure has space for one coefficient and one exponent and a link. Assume.
armature and field resistances are 0.03 ohm. And 60 ohm ... 6.a) Explain with the help of diagrams how a rotating magnetic field is produced in · the air gap of a ...
Explain in detail gas liquid contact in mechanically agitated vessels. ... b) Derive the expression for height of a water cooling tower by using HTU and NTU.
Explain determinants and use of determinancy diagram. 2.a) ... Draw the E/R model representation of many-to-many relationship and · superfluous entity tables.
b) With the help of a neat sketch of psychometric chart show the various psychrometric · processes naming them clearly. c) Explain what effective temperature is ...
b) State the method of manufacturing and special qualities of the following bricks. (i) sand â lime bricks (ii) Fly ash bricks (iii) Stabilised bricks. c) Explain briefly ...
the following (with comments and indentation) · a) To read the ... OR. Develop a complete COBOL program with indentation and comments to do the · following:.
... shown below. Take node 4 as reference · node. 7.a) Obtain the relation between Y and Z parameters. b) Find A B C D parameters of the network shown below.
320256. III-B.Tech. II Semester Supplementary Examinations December 2002/January 2003 · MODELLING OF POWER SYSTEM COMPONENTS · (Electrical and Electronics Engineering) · Time: 3 hours · Max. Marks: 70 · Answer any FIVE questions · All questions carry
c) A simple Delavel steam turbine nozzle ring is supplied with 200 kg/hr of dry · steam at 10 ... iii) The dryness of steam just as it leaves the turbine rotor blading.
10 kVA at 0.8 pf lagging, load B draws 15 kW at a 0.5 pf lagging and load C · dissipates 5 kW at unity pf. (i) Find active power, reactive power and line current.
Code No:220352. II.B.Tech II-Semester. Supplementary ... not to exceed 90 N/mm · 2 · and (ii) The maximum shear stress is not to exceed 45 · N/mm · 2 . Tube.
1011. 7.a) Discuss the generation and detection of pulse width modulation. b) Explain the principle transversal equiliber. 8. Write short notes on the following:.
potential and muscle contraction. 2.a) With a neat ... b) Explain the origin of ECG from the heart muscles. ... 4.a) What are the different types of muscles? Explain ...
... plate capacitor is · equal to the conduction current in the leads. b) Investigate the vector magnetic potential for the infinite, straight, current element · L in free space. 3. Find the magnetic field intensity due to the presence of a finite st
2.a) With a neat sketch explain the operation of a cupola, its charge composition and · control of the melt composition. b) Briefly explain the pressure die casting ...
