Nova Southeastern University Computational Thinking Diagrams Paper

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EXERCISES
1. Write a group of functional requirements in the style of Figure 4.1
for the task of setting the time on a common wristwatch.
2. Draw a class diagram for the wristwatch described in the previ-
ous exercise.
3. Draw a class diagram for the DVD player described in Figure 4.1.
4. Create a use case diagram for handling books in a library. Be certain
to capture the work of patrons and librarians.
5. For each of the following situations, describe whether the reasoning
is deductive or inductive.
a. Scientific investigation relies upon two different laboratories that
are able to repeat the same experiment before publishing the result.
b. Using the current weather radar and local forecast for the day,
you decide whether to schedule an outdoor party.
C. Based upon the US Constitution lawyers argue a specific case in
front of the Supreme Court.
d. A mathematician proves a new theorem by applying accepted axi-
oms and other theorems as reasoning for each step of the proof.
e. A painter decides whether to use oil or water colors for a particular
painting based upon past experiences using these different media.
f. A forensic expert concludes that someone died of natural causes,
based upon her education and the results of an autopsy.
Index: V1
Name: Play
Action: Clicking the play button (see image to the right) causes
the video to begin playing. If the video was just paused, then
playing the video resumes at the point of pausing. If the video
has yet to start playing, then a new computer window is cre-
ated and the video begins playing in the window. So long as
the video is playing the pause/play button functions as a pause button,
displaying a pause button image.
Index: V2
Name: Pause
Action: Clicking the pause button (see image to the right) causes
the video to pause at the current play location. If the video has
already finished playing, then this button has no effect. Clicking
the pause button causes the pause/play button to function as a
play button, displaying a play button image.
II
Index: V3
Name: Increase Volume
Action: Clicking the increase volume button while the volume is less
than the maximum 80 dB level causes the volume to increase by
5 dB Clicking the increase volume button while the volume is at
the 80 dB level does nothing.
Index: V4
Name: Decrease Volume
Action: Clicking the decrease volume button while the volume is
greater than the silent (0 dB) level causes the volume to decrease
by 5 dB Clicking the decrease volume button while the volume is
at the silent level does nothing.
)
FIGURE 4.1 A few functional requirements for a video player app.