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Cork Institute of Technology
Higher Certificate in Science in Computing in Information Technology Support –
Award
(National Certificate in Computing in Information Technology Support – Award)
(NFQ – Level 6)
Autumn 2005
Multimedia
(Time: 3 Hours)
Instructions Answer FOUR questions All questions carry equal marks.
Examiners: Mr. E. A. Parslow Mr. P. O Connor Dr. D. Chambers Mr. C.E. Manning
Q. 1 (25 marks)
Write the HTML required to specify the table illustrated below.
Mary had a Little lamb
Its fleece Was white as snow
She went to Dún Laoghaire To España
And she went to CIT She went
almost everywhere
Everywhere that Mary went the lamb was sure to go
You may assume that all type is the default font and size. CIT is a link to the CIT homepage. The centered lamb image is 100x100 pixels and is named “lamb.gif”
Part A (7 marks) Zogese is a language with only 16 characters.[14 letters, a space, a full-stop]. As a result, computer systems in Zoglandia use only 4 bits per character. The table below shows each of the characters, its binary code, and the frequency with which the character occurs in Zogese text. Explain how variable length codes could be used to reduce the number bits used to store Zogese text.
Character Code Frequenc y
Character Code Frequenc y ● 0000 13 P 1000 4 A 0001 10 R 1001 4 E 0010 10 T 1010 4 O 0011 8 V 1011 2 B 0100 7 Z 1100 1 D 0101 5 F 1101 1 K 0110 5 H 1110 1 M 0111 5 Space 1111 20
Part B (10 marks) Propose an appropriate alternative table that employs variable length codes. [Your table need not be optimal]
Part C (8 marks) What is run length encoding?
Part A (5 marks)
What is a palette clash?
Part B (6 marks)
What is a Web Palette?
Part C (7 marks)
In Adobe Photoshop ®^ what is the difference between the Exact Palette and the Adaptive Palette?
Part D (7 marks)
In Adobe Photoshop ®^ what is the difference between the Adaptive Palette and the Uniform Palette?
Q6. (25 marks)
A C A C A C A C
C C C C C C C C
C B C B C B C B
C C C C C C C C
A C A C A C A C
C C C C C C C C
C B C B C B C B
C C C C C C C C
The table above shows three differently coloured pixels that have been used to simulate R:156 G: B:163 by dithering. A is R:200 G:100 B: B is R:50 G:100 B:
Part A (20 marks)
What RGB values does C have?
Part B (5 marks)
Propose an alternative 2-colour dithering scheme for R:156 G:94 B:
