Set No. Code No.320401 III B.Tech. II-Semester Supplementary Examinations, November-2003
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OPERATING SYSTEMS (Common to Electronics and Communication Engineering and Electronics and Instrumentation Engineering) Time: 3 hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---
What is OS? Describe the different types of Operating systems with the examples.
2.a) b)
Explain the role of process control block in OS. Differentiate the following (i) Process Switching Vs Context Switching (ii) Clock Interrupt Vs I/O interrupt
3.a)
Give the program for Dekker’s 4th attempt algorithm for two processors and explain. How the hardware can be supported for the problem of Mutual exclusion? Explain.
b)
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Explain all the strategies involved in deadlock detection and how it is recovered.
5.a) b)
Define Memory Management. Explain in detail the requirements that memory management needs to satisfy.
6.
Describe various short term scheduling policies.
7.
Explain briefly the file organisation in UNIX system V.
8.
What do you understand by Trusted systems? Draw a figure of reference monitor concept and explain.
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Set No. Code No.320401 III B.Tech. II-Semester Supplementary Examinations, November-2003
2
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OPERATING SYSTEMS (Common to Electronics and Communications Engineering and Electronics and Instrumentation Engineering) Time: 3 hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---
What is Multiprogramming? Explain the memory hierarchy with reference to the uses, characteristics, applications and functions.
2.
Describe the relationship between threads and Processes with an example.
3.a)
Write the Peterson’s algorithm for the mutual exclusion problem and explain the same. What is meant by semaphore? Explain with an example.
b)
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Explain the banker's algorithm in detail.
5.a)
Another placement algorithm for dynamic partitioning is referred to as worst fit. In this case, the largest free block of memory is used for bringing in a process. Discuss the pros and cons of this method compared to first-next and best fit. What is the average length of the search for worst-fit
b)
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What is the I/O buffering? Explain different types of buffers.
7.
Write about: a) Free space management b) Reliability of a file allocation
8.
Discuss about security implementation by pass-word protection.
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Set No. Code No.320401 III B.Tech. II-Semester Supplementary Examinations, November-2003
3
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OPERATING SYSTEMS (Common to Electronics and Communications Engineering and Electronics and Instrumentation Engineering) Time: 3 hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---
With the help of simple interrupt processing block diagram, Explain the interrupt processing with an example.
2.a) b)
Explain process state diagram (5 state model) with a neat sketch. Describe the typical elements of process control block.
3.a) b)
Write the program for mutual exclusion using semaphores. Explain about infinite buffer producer/consumer problem for concurrent processing which uses binary semaphores.
4.
How the problem among dining philosophers can be resolved. Suggest a suitable algorithm.
5.
Write short notes on the following: a) Page Table structure b) Translation look-aside buffer. c) Segmentation d) Paging
6.a) b)
Discuss about various criteria used for short-term scheduling. Discuss about fair share scheduling method.
7.a) b) c)
Explain file system software architecture. What are the important criteria in choosing a file organization? Explain the pile and sequential file organization.
8.
Write short notes on: a) Trojan Horse defense b) Trojan horses
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Set No. Code No.320401 III B.Tech. II-Semester Supplementary Examinations, November-2003
4
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OPERATING SYSTEMS (Common to Electronics and Communication Engineering and Electronics and Instrumentation Engineering) Time: 3 hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---
Explain the difference between the Cache and Main Memory with the help of its structure and operation.
2.a) b) c) d)
What is meant by process preemption. What is swapping and what is its purpose. What is the difference between process switching and context switching? What is the difference between an interrupt and a trap?
3.a)
What is meant by monitor? How the monitor concept is used in solving mutual exclusion problem? How the processors are communicating with each other?
b)
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How the problem among dining philosophers can be resolved. Suggest a suitable algorithm.
5.a) b) c) d)
Discuss in detail about variable allocation policy. Enumerate the strategy to be followed for resident set size. Discuss the possible problems with Working set strategy. Write short notes on the Page Fault Frequency algorithm
6.
Write short notes on the following: a) Shortest process next b) Shortest remaining time c) Highest response ratio next d) Single-Server queues with two priorities
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4.
What do you understand by a file directory Explain briefly the information elements of a file directory. Explain what is tree-structured directory.
2.a) Explain the role of process control block in OS. ... Explain briefly the file organisation in UNIX system V. 8. What do you understand by Trusted systems?
List out the practical considerations to be checked for continuous gas ... Explain how silica analysis is done in boiler water of power plant. 3. a) What is meant by ...
What do you understand by principles of planning a building? Prepare a typical · aspect diagram for the area where direction of prevailing breeze is from North-.
b) Draw the circuit diagram of 4-bit Johnson counter using D-flip flop and explain .... 6. a) Compare merits and demerits of ripple and synchronous counters.
Given: turbine diameter = 120m and turbine operating speed = 40 rpm at · maximum efficiency. Propeller type wind turbine is considered. 4. a) What is the basic ...
Obtain an expression for unit speed, unit discharge and unit power for a turbine. 2. a) What do you understand by air vessels? Explain with a neat sketch.
1.a) Obtain the expression for the resistance and capacitance for gas system. ... List various variables to be measured and controlled in nuclear power plant.
instructions at the beginning and end of this set of code in order to switch .... 5.a) Write an assembly language program that will examine an ASCII string of 100.
If the analog i/p voltage is +6.85 v, what will be the R-2R ladder · o/p voltage when ... b) Design a ramp generator using 555 timer having an output frequency of.
efficiency of the cycle and mean effective pressure for the cycle. ... b) Calculate the heat flux emitted due to thermal radiation from a black surface at · 6000.
8.a) Write a note on creep resistant materials. b) Explain all the ... b) Sketch the creep diagram, and explain the various stages of creep. @@@@@. Set No. 2.
What is the difference between radio compass and ADF? Explain the principle · and operation of Automatic direction finder. 6. Define analog and digital ...
endurance limit of a metal. b) What are the factors which affect the fatigue strength of materials? 7. a) What is creep? Draw an ideal creep curve and explain the ...
(i) Band Rate · (ii) Request Filter ... 3. a) Write the comparison between teleprinters and CRT terminals. b) What are the ... What savings does it offer? b) What is a ...
b) How does butadiene differ from isoprene? 4.a) Describe about the synthetic fiber industry in India. b) Write, with an example on each of the following.
graph. b) Draw the state space tree for m-closing graph using a suitable graph. 8. Present a program schema for a FIFO Branch & Bound search for a Least-Cost.
b) Explain the effect of Metallurgical variables on fatigue properties · 7.a) Explain Ductile to Brittle transition phenomenon. b) Compare charpy with Izod impact testing. 8.a) What is stress relaxation. Draw stress-strain curves for ductile and brit
Information Technology, Electronics and Control Engineering, Electronics and ... Computer Engineering, Computer Science and System Engineering) ..... Draw and explain the logic diagram of a master slave D flip-flop using Nand gates. ###.
Chemical Engineering, Mechatronics, Metallurgy & Material Technology, · Aeronautical ... b) What is cache memory? Where is it placed? What is its .... 7.a) Explain the steps involved in computing the coefficients of the regression · polynomial.
b) Classify the blast furnace stoves. What are the different values in the stove and · their functions? 3.a) What factors affect reducibility of iron ores? Discuss them.
1.a) Write the name of places for occurance of iron ores in India. b) Explain the process of either Sintering or Pelletizing. 2.a) Explain hearth, tuyeres, stack with ...
