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Answer Key and Solved Questions Paper-3 UGC-NET Computer Science June 2015

11.the relational schemas R1 and R2 form a loseless join decomposition of R if and only if
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12.In the index allocation scheme of blocks to a file, the maximum possible size of the file depends on
A.The number of blocks used for the index, and the size of the index
B.The size of the blocks, and the size of the address
C.size of the index
D.size of the blocks
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13.Give the number of principal vanishing point (s) along with their direction for the standard perspective transformation :
A.only one in the direction K
B.Two in the directions I and J
C.Three in the directions I, J and K
D.Only two in the directions J and K
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14.Consider a triangle represented by A(0, 0), B(1, 1), C(5, 2). The triangle is rotated by 45 degrees about a point P( -1, -1). The co-ordinates of the new triangle obtained after rotation shall be
A.A'(-1, √2 -1), B'(-1, 2√2 - 1), C'((3/2)√2 - 1, (9/2)√2 - 1)
B.A'(√2 -1,- 1), B'( 2√2 - 1, -1), C'((3/2)√2 - 1, (9/2)√2 - 1)
C.A'(-1, √2 -1), B'(2√2 - 1, -1), C'((3/2)√2 - 1, (9/2)√2 - 1)
D.A'(-1, √2 -1), B'( 2√2 - 1, -1), C'((9/2)√2 - 1, (3/2)√2 - 1)
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15.The process of dividing an analog signal into a string of discrete outputs, each of constant amplitude is called
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16.which of the following is not a basic primitive of the graphics kernel system(GKS) ?
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17.Which of the following statements is/are incorrect ?
A.Mapping the co-ordinates of the points and lines that form the picture into appropriate co-ordinates on the device or workstation is known as viewing transformation.
B.The right handed cartesian co-ordinate system in whose coordinates we describe the picture is known as world coordinate system.
C.The co-ordinate system that corresponds to the device or workstation where the image is to be displayed is known as physical device co-ordinate system.
D.Left-handed co-ordinate system in which the display area of the virtual display device corresponds to the unit(|x|) square whose lower left handed corner is at origin of the co-ordinate system, is known as normalized device co-ordinate system.
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18.Match the following
List-I List-II
Flood Gun An electron gun designed to flood the entire screen with electrons.
CollectorPartly energised by flooding gun, stores the charge generated by the writing gun
Ground used to discharge the collector
Phosphorus Grains used in memory -tube display and similar to those used in standard CRT
Writing Gun System used in memory -tube display and basically the same as the electron gun used in a conventional CRT.

Codes : (a) (b) (c) (d) (e)
A.(i) (ii) (iii) (iv) (v)
B.(ii) (iii) (i) (iv) (v)
C.(iii) (i) (ii) (v) (iv)
D.(iv) (v) (i) (ii) (iii)
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19.Minimal Deterministic finite automaton for the language L = { 0n | n > 0, n ≠ 4 } will have
A.1 final state among 5 states
B.4 final states among 5 states
C.1 final state among 6 states
D.5 final states among 6 states
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20.The regular expression corresponding to the language L where L = { x ∈ {0,1}* | x ends with 1 and does not contain substring 00 } is
A.(1 + 01)*(10 + 01)
B.(1 + 01)*01
C.(1 + 01)*(1 + 01)
D.(10 + 01)* 01
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Author Does Not claim of any answer these answers are as per expert opinion

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