UGC NET Computer Science Paper III Re-test September 2013 - Part 8

71.       Consider a main memory with 3 page frames for the following page reference string :
5, 4, 3, 2, 1, 4, 3, 5, 4, 3, 4, 1, 4
Assuming that the execution of process is initiated after loading page 5 in memory, the number of page faults in FIFO and second chance replacement respectively are
(A) 8 and 9
(B) 10 and 11
(C) 7 and 9
(D) 9 and 8
Answer: D

72.       Which of the following shell scripts will produce the output “my first script”?
(A) for i in my first script { echo –i $i}
(B) for my first script; do echo –n; done
(C) for i in my first script; do echo –i $i; done
(D) for n in my first script; do echo –i $i; done
Answer: C
73.       The portion of Windows 2000 operating system which is not portable is
(A) processor management
(B) user interface
(C) device management
(D) virtual memory management
Answer: D
74.       Match the following for Windows Operating System :
List - I
(a) Hardware abstraction layer
(b) Kernel
(c) Executive
(d) Win32 subsystem
List - II
(i) Starting all processes, emulation of different operating systems, security functions,
transform character based applications to graphical representation.
(ii) Export a virtual memory interface, support for symmetric multiprocessing,
administration, details of mapping memory, configuring I/O buses, setting up DMA.
(iii) Thread scheduling, interrupt and exception handling, recovery after power failure.
(iv) Object manager, virtual memory manager, process manager, plug and-play and
power manager.
Codes :
      (a)   (b)  (c)  (d)
(A) (i)    (iii)  (ii)  (iv)
(B) (iv)  (iii)  (ii)   (i)
(C) (ii)  (iii)   (iv)  (i)
(D) (iii)  (ii)   (i)   (iv)
Answer: C
75.       Which of the following statements is not true for UNIX Operating System?
(A) Major strength of UNIX Operating System is its open standards which enabled large number of organizations ranging from academicia to industries to participate in its development.
(B) UNIX kernel uses modules with well specified interfaces and provides advantages like simplified testing and maintenance of kernel. It has better extensibility as the kernel is not monolithic.
(C) UNIX is kernel based operating system with two main components viz. process management subsystem and file management subsystem.
(D) All devices are represented as files which simplify the management of I/O devices and files. The directories structure used is directed acyclic graph.
Answer: B

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