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Solved Questions Paper-2 UGC-NET Computer Science June 2015

31.Match the following:
List-I List-II
(a) Forward Reference Table (i) Assembler directive
(b) Mnemonic Table (ii) Uses array data structure
(c) Segment Register Table (iii) Contains machine OP code
(d) EQU (iv) Uses linked list data structure
(a) (b) (c) (d)
A.(ii) (iii) (iv) (i)
B.(iii) (iv) (ii) (i)
C.(iv) (i) (iii) (ii)
D.(iv) (iii) (ii) (i)
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32.The translator which performs macro calls expansion is called :
A.Macro processor
B.Micro pre-processor
C.Macro pre-processor
D.Dynamic linker
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33.If all the production rules have single non - terminal symbol on the left side, the grammar defined is:
A.context free grammar
B.context sensitive grammar
C.unrestricted grammar
D.phrase grammar
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34.Which one from the following is false ?
A.LALR parser is Bottom - Up parser
B.A parsing algorithm which performs a left to right scanning and a right most deviation is RL (1).
C.LR parser is Bottom - Up parser.
D.In LL(1), the 1 indicates that there is a one - symbol look - ahead.
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35.Which phase of compiler generates stream of atoms ?
A.Syntax analysis
B.Lexical Analysis
C.Code generation
D.Code optimization
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36.A disk drive has 100 cylinders, numbered 0 to 99. Disk requests come to the disk driver for cylinders 12, 26, 24, 4, 42, 8 and 50 in that order. The driver is currently serving a request at cylinder 24- A seek takes 6 msec per cylinder moved. How much seek time is needed for shortest seek time first (SSTF) algorithm?
A.0.984 sec
B.0.396 sec
C.0.738 sec
D.0.42 sec
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37. Let Pi and Pj be two processes, R be the set of variables read from memory, ot and W be the set variables written to memory. For the concurrent execution of two processes Pi and Pj, which of the following conditions is not true?
A.R(Pi) ⋂ W (Pj) = ф
B.W(Pi) ⋂ R (Pj) = ф
C.R(Pi) ⋂ R (Pj) = ф
D.W(Pi) ⋂ W (Pj) = ф
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38.A LRU page replacement is used with four page frames and eight pages. How many page faults will occur with the reference string 0172327103 if the four frames are initially empty?
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39.What does the following command do ? grep ? vn "abc" x
A.It will print all of the lines in the file x that match the search string "abc"
B.It will print all of the lines in file x that do not match the search string "abc"
C.It will print total no of the lines in file x that match the search string "abc".
D.It will print the specific line numbers of file x in which there is a match for the string "abc".
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40.The Unix Kernel maintains two key data strucfures related to processes, the progress table and the user structure. Which of following information is not the part of user
A.File descriptor table
B.System call state
C.Scheduling parameters
D.Kernel stack
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Author Does Not claim of any answer these answers are as per expert opinion

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