CBSE NET JULY 2016 PAPER 3 SOLVED PART-2

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  1. In perspective projection, if a line segment joining a point which lies in front of the viewer to a point in back of the viewer is projected to a broken line of infinite extent. This is known as _________

1) View confusion

2) Vanishing PointUGC net study material

3) Topological distortion

4) Perspective foreshortening

answer is 3

  1. Let us consider that the original point is (x,y) and new transformed point is (x’,y’). Further, Shx and Shy are shearing factors in x and y directions. If we perform the y-direction shear relative to x=xref then the transformed point is given by ______.

1) x’=x+Shx.(y-yref)

y’=y

2) x’=x

y’=y.Shx

3) x’=x

y’=Shy(x-xref)+y

4) x’=Shy.y

y’=y.(x-xref)

answer is 3

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  1. Which of the following statement(s) is/are correct with reffrence to curve generation?
  2. Hermite curves are generated using the concepts of interpolation.
  3. Bezier curves are generated using the concepts of approximation.

III. The Bezier curve lies entirely within the convex hull of its control points.

  1. The degree of Bezier curve does not depend on the number of control points.

1) I,II and IV only

2) II and III only

3) I and II only

4) I,II and III only

answer is 4

19.Given the following statements :

(A) TO implement Abstract Data Type, a Programming language require a syntactic unit to encapsulate type definition.

(B) TO implement Abstract Data Type, a Programming language require some primitive operations that are buit in the language processor.

(C) C++,Ada,JAVA 5.0,C#2005 provide support for parameterized ADT.

Which one of the following option is correct?

1) (A),(B) and (C) are false

2) (A) and (B) are True; (C) is false

3) (A) is true ;(B) and (C) are false

4) (A) (B) and (C) are true

answer is 4

  1. Match the following types of variables with the corresponding programming languages:

(a) Static variables (i) Local variables in Pascal

(b) Stack dynamic (ii) All variables in APL

(c) Explicit heap dynamic (iii) Fortran 77

(d) Implicit heap dynamic (iv) All objects in JAVA

Codes:

(a) (b) (c) (d)

(A) (i) (iii) (iv) (ii)

(B) (iv) (i) (iii) (ii)

(C) (iii) (i) (iv) (ii)

(D) (ii) (i) (iii) (iv)

Answer: C

  1. Which of the following is false regarding the evaluation of computer programming languages?

(A) Application oriented features (B) Efficiency and Readability

(C) Software development (D) Hardware maintenance cost

Answer: D

  1. The symmetric difference of two sets S1 and S2 is defined as

S1ΘS2 = {x|xϵS1 or xϵS2, but x is not in both S1 and S2}

The nor of two languages is defined as

nor (L1,L2) = {w|w ∉ L1 and w|w ∉ L2}

Which of the following is correct?

(A) The family of regular languages is closed under symmetric difference but not closed under nor.

(B) The family of regular languages is closed under nor but not closed under symmetric difference.

(C) The family of regular languages are closed under both symmetric difference and nor.

(D) The family of regular languages are not closed under both symmetric difference and nor.

Answer: C

  1. The regular expression for the complement of the language L = {anbm|n≥4, m≤3} is:

(A) (λ + a + aa + aaa)b* + a*bbbb* + (a + b)*ba(a + b)*

(B) (λ + a + aa + aaa)b* + a*bbbbb* + (a + b)*ab(a + b)*

(C) (λ + a + aa + aaa) + a*bbbbb* + (a + b)*ab(a + b)*

(D) (λ + a + aa + aaa)b* + a*bbbbb* + (a + b)*ba(a + b)*

Answer: D

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  1. Consider the following two languages:

L1 = {0i1j | gcd(i,j)=1}

L2 is any subset of 0*.

Which of the following is correct?

(A) L1 is regular and L2* is not regular

(B) L1 is not regular and L2* is regular

(C) Both L1 and L2* are regular languages

(D) Both L1 and L2* are not regular languages

Answer: B

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  1. If link transmits 4000 frames per second and each slot has 8 bits, the transmission rate of circuit of this TDM is ……………

(A) 64 Kbps (B) 32 Mbps

(C) 32 Kbps (D) 64 Mbps

Answer: C

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  1. Given the following statements:

(a) Frequency Division Multiplexing is a technique that can be applied when the bandwidth of a link is greater than combined bandwidth of signals to be transmitted.

(b) Wavelength Division Multiplexing (WDM) is an analog multiplexing Technique to combine optical signals.

(c) WDM is a Digital Multiplexing Technique.

(d) TDM is a Digital Multiplexing Technique.

Which of the following is correct?

(A) (a), (b), (c) and (d) are true.

(B) (a), (b), (c) and (d) are false.

(C) (a), (b) and (d) are false; (c) is true.

(D) (a), (b) and (d) are true; (c) is false.

Answer: D

  1. A pure ALOHA Network transmit 200 bit frames using a shared channel with 200 Kbps bandwidth. If the system (all stations put together) produces 500 frames per second, then the throughput of the system is …………..

(A) 0.384 (B) 0.184

(C) 0.286 (D) 0.586

Answer: B

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  1. Match the following:

(a) Line coding (i) A technique to change analog signal to digital data.

(b) Block coding (ii) Provides synchronization without increasing

number of bits

(c) Scrambling (iii) Process of converting digital data to digital signal.

(d) Pulse code modulation (iv) Provides redundancy to ensure synchronization

and inherits error detection.

Codes:

(a) (b) (c) (d)

(A) (iv) (iii) (ii) (i)

(B) (iii) (iv) (ii) (i)

(C) (i) (iii) (ii) (iv)

(D) (ii) (i) (iv) (iii)

Answer: B

  1. Assume that we need to download text documents at the rate of 100 pages per minute. A page is an average of 24 lines with 80 characters in each line and each character requires 8 bits. Then the required bit rate of the channel is …………….

(A) 1.636 Kbps (B) 1.636 Mbps

(C) 2.272 Mbps (D) 3.272 Kbps

Answer: A

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  1. Encrypt the plain text Message “EXTRANET” using Transposition cipher technique with the following key:
3 5 2 1 4 (Cipher text)
1 2 3 4 5 (Plain text)

Using ‘Z’ as bogus character.

(A) TAXERTZENZ (B) EXTRANETZZ

(C) EZXZTRZANZET (D) EXTZRANZETZ

Answer: A

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