# DIT506  DESKTOP PHOTOGRAPHY  VIDEO EDITING.

UNIVERSITY EXAMINATIONS: 2018/2019
EXAMINATION FOR THE DIPLOMA IN INFORMATION
TECHNOLOGY
DIT 506: DESKTOP PHOTOGRAPHY & VIDEO EDITING
DATE: APRIL, 2019 TIME: 2 HOURS
INSTRUCTIONS: Answer question One and ANY other two questions.

QUESTION ONE
a) Distinguish between
i) timeline and storyboard (4 Marks)
ii) Digital and optical zoom (4 Marks)
iii) Aperture and shutter (4 Marks)
iv) Rule of thirds and depth of field (4 Marks)
b) Why is photography and art and a science (4 Marks)
c) An audio file occupies 360MB. If its recorded at (44.1khz, 16 bit and stereo). What is the
duration in minutes (4 Marks)
d) Explain
i) sample rate
ii) bit resolution
iii) channels (6 Marks)
QUESTION TWO
a) Camera has a resolution of 5120×4850. If the size of the graphical images created is
53.28MB.
Calculate
i) Pixel count (2 Marks)
ii) Colour depth (3 Marks)
iii) Number of colours that can be displayed (2 Marks)
iv) Aspect ratio (2 Marks)
b) If the storage space is 8GB for the camera in b) and that it can take 307 pictures, what
is the compression ratio for the algorithm used (2 Marks)
c) State Four advantages of using JPEG format over BMP format in photo editing
(4 Marks)
d) State FIVE features found in digital cameras that edged out the traditional cameras
(5 Marks)
QUESTION THREE
a) A video file of a size 19770.56 GB , colour depth of 20 bits, duration of 3 hours, and
frame rate of 30fps, takes 5 hours to download using a bandwidth of 1.1GBps.
Calculate
i) the pixel count of the camera in megapixels (8 Marks)
ii) the resolution, if the aspect ratio is 16:9 (2 Marks)
iii) the bandwidth requirements, if 20 users are to download the same video for 5hrs
concurrently (2 Marks)
iv) cost of the bandwith in a) if the cost of 128KBps is Kshs 60,000 (4 Marks)
b) Recommend a suitable method to enable your target audience to view the video
(4 Marks)
QUESTION FOUR
a) Using Lempel ziv coding technique encode: ABBBCCCDAADAEAABA (6 Marks)
b) Using runlength coding, encode the following binary data
1000000000000001000000000010000000110000001 (6 Marks)
C) Using Huffman encoding algorithm for a data file that has the following characters

i) give the Huffman tree and code (6 Marks)
ii) using (i) encode AADBDC (2 Marks)
QUESTION FIVE
The procurement department at KCA UNIVERSITY has requested you to tender for videography
and videoediting services for the upcoming university graduation and prepare a documentary to be
aired on national television. Prepare an elaborate report indicating the equipment you have and the
estimated costs for the services. Marks will be given for a comprehensive workflow of the
required activities and references indicating your qualification and experiences in such
functions.
(20 Marks)

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