FOURTH SEMESTER DIPLOMA EXAMINATION IN ENGINEERING/TECHNOLOGY-OCTOBER-2009
OPERATING SYSTEMS
PART-A
(Maximum marks:15)
v Answer the following questions in one or two sentences:
1.Define operating system.
2.What is meant by time sharing systems?
3.What are the functions of command interpreter?
4.Define critical section problem.
5.What is overlays?
6.Explain Belady’s anomaly.
7.What is spooling?
8.Define rotational latency.
9.Define process ID.
10.List the functions of Kernel.
PART-B
(Maximum marks:60)
(Answer one full question from each unit)
Unit-1
v (a)Define multiprocessing.(2)
(b)Differentiate symmetric and asymmetric multiprocessing.(4)
(c)Explain the advantages of multiprocessor systems.(6)
OR
v (a)Explain the abstract view of components of a computer system.(4)
(b)Explain the storage hierarchy with diagram.(8)
Unit-2
v (a)Define a process(2)
(b)Explain process control block(PCB)with diagram(4)
(c)Explain different states of a process with state diagram(6)
OR
v (a)What is a thread?.(2)
(b)Distinguish between user level threads and kernel level threads(4)
(c)Explain various multithreadingmodels.(6)
UNIT-3
v (a)Explain demand paging.(6)
(b)What is thrashing?State the cause of thrashing.(6)
OR
v (a)Explain segmentation with diagram(8)
(b)Explain the advantages of segmentation with paging(4)
UNIT-4
v (a)Explain different file access methods.(6)
(b)What are the different allocation methods used to allocate disk space?Explain each with diagram(6)
OR
v (a)Explain I/O hardware with bus structure diagram.(6)
(b)Explain various disk scheduling algorithms with example.(6)
UNIT-5
v (a)Explain different components of Linux system with diagram.(8)
(b)With necessary example explain the following commands.
(i)cat (ii)kill (iii)pwd (iv)who (4)
OR
v (a)What is meant by shell script(3)
(b)Explain with example various looping statements in shell programming(9)
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