# UGC NET COMPUTER SCIENCE SOLVED PAPERS 2014-16 - UGC NET Computer Science Paper 3 August 2016

>>>>>>>>UGC NET Computer Science Paper 3 August 2016

• A

0* 1*  • B

00*  • C

10*  • D

1*0*  • A

h<((|W| - 1)/k-1)  • B

logk|W| < h  • C

logk|W| < h < ((|W| - 1)/k-1)  • D

logk|W| <= h <= ((|W| - 1)/k-1)  • A

Huffman coding  • B

Runlength encoding  • C

Zig-zag scan  • D

K-L Transform  • Option : D
• Explanation :
• Huffman coding is a lossless data compression algorithm, it is used in JPEG image compression.
• Run-length encoding (RLE) is a very simple form of lossless data compression in which runs of data are stored as a single data value and count, rather than as the original run, it is used in JPEG image compression.
• Zig-zag scan is also used in JPEG image compression.
• K-L transform is not used in JPEG image compression, It is used to transform the image.
• So, option (D) is correct.

• A

Huffman coding  • B

Arithmetic coding  • C

Run-length coding  • D

DPCM  • Option : D
• Explanation :
• DPCM is Differential pulse-code modulation which convert source analog into digital signal(i.e. source coding).
• Huffman coding is a lossless data compression algorithm.
• Arithmetic coding is a form of entropy encoding used in lossless data compression.
• Run-length encoding (RLE) is a very simple form of lossless data compression in which runs of data are stored as a single data value and count, rather than as the original run.
• So, option (D) is correct.

• A

Dark  • B

Good contrast  • C

Bright  • D

Very low contrast  • Option : A
• Explanation :
Histogram is a accurate tonal representation of digital image. In which x- axis represent tonal variation and y-axis represents pixels. So, if the histogram of an image is clustered towards origin on X-axis of a histogram plot then it indicates that the image is dark and if the histogram of an image is clustered towards origin on Y-axis of a histogram plot then it indicates that the image is bright. So, option (A) is correct.