ITEC2110 Fall 2011 Test 1, Dr. Jim Rowan
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1)- Phenomenon in the real world can be described as having two different modalities.
Discrete phenomena are easy to convert to digital because you can simply count them.
Continuous phenomenon are a bit more complicated because you can’t simply count
them, instead you must convert them. What is this conversion process called?
2)-Name an affordance found in the electronic pdf version of a book that is not found in
the bound, paper version of that same book.
3)- Most bound books are intended to be read from front to back in a linear manner.
Name one bound book that is not intended to be read from front to back in a linear
manner.
4)- A 16 bit quantization level can encode 65,536 different levels. You decide that 16,384
levels will achieve the quality you want. How many bits will be required?
5)- You have an audio recording that is sampled at 8,000 samples per second. Each one
of these samples is two bytes in length. It is a stereo recording. How many bytes of data
would you have captured if you record for 1 minute 10 seconds?
6)-When counting in hexadecimal, what comes after A9?
7)- You have taken over a research project after the retirement of a colleague. One of the
things you inherited is a library of audio files that were sampled at 15,500 samples per
second with a 1 byte sample size. Your new research involves manipulating sounds that
dogs but not humans can hear in the range of 28,000 cycles per second. Why can’t you
use these files even though you know that sounds of that frequency were being made
during the recorded performance?
8)- Are the number of ants in an anthill an example of a discrete or continuous real world
phenomenon?
9)- Using ADSL with upload speeds of 640,000 bps how long will it take you to upload
your audio file to your wiki site if the sample size is two bytes, the sample rate is 44,100
samples per second and the audio plays for 15 seconds?
10)- How many bits are there in a file that has a 11MB file size?
11)- You have an audio recording that is sampled at 22050 samples per second. Each
sample is 4 bits and there is only one track because it is not stereo. How many bytes of
data would you have captured if you recorded in stereo for 30 seconds?
12)- Name one lossy compression technique that we mentioned in class.
13)- Name one lossless compression technique?
14)- What is one thing that affects the filesize of a vector graphic?
15)- The invention of the desktop metaphor was responsible for the proliferation of
personal computers as we know them today. Who’s team at XEROX PARC was
responsible for developing the desktop metaphor?
16)- Which type of image, either bitmapped or vector graphic, has problems scaling?
17)- Give one advantage that BOTH a scroll and a bound book have over a hyperlinked
document.
18)- ADSL is an asymmetric data connection. What does this mean?
19)- In binary, what does 101 + 1 = ?
20)- Given this URL: http://www.pondliner.com/waterpumps/premiumPump.html what
is the domain name?
21)- Given this URL: http://www.pondliner.com/waterpumps/premiumPump.html what
is the file name of the file that the server will return to your browser?
22)- At home, your connection to the Internet will most likely be made using DHCP.
What does the use of DHCP mean in terms of the IP address?
23)- For a gray linear gradient to be able to have 512 different shades of gray what is the
minimum number of bits that would be required to encode it?
24)- You have an audio file that is (not counting the header and other administrative
overhead) 15MB in length. You know it is stereo, was sampled at 44,100 samples per
second and the quantization level is 16 bits. When opened with quicktime how long
should this audio file play?
25)- How many different things can be counted using 3 hexadecimal digits?