Quiz 1
Contents
1. 6 831 User Interface Design amp Implementation Fall 2004 Quiz 1 This quiz is closed book closed notes You have 80 minutes to complete it Your name 1 3 points Which of the following are measurable dimensions of usability check all that apply _X_ Learnability _X_ Efficiency Price _X_ Error rate _X_ Response time _X_ Satisfaction 2 3 points Assuming all of the following statements are true which is least likely to be revealed by user and task analysis A Files are rarely renamed B Acar must be washed before it can be waxed C The 3D game interface you ve designed makes some users nauseous D Some users know the model number of the product they want E A restaurant kitchen is a noisy place Choose one C___ User testing might reveal the nausea problem after you ve built the interface But user and task analysis precedes construction of the interface 3 4 points Louis Reasoner says People can t keep more than 7 2 letters in working memory In what sense is he right and in what sense is he wrong Working memory does store 7 2 chunks and a letter is one kind of chunk But chunks aren t always letters A person might be able to rearrange many letters into a few memorable chunks e g words For the questions on this page suppose you re going to design and implement an alarm clock especially for blind users 4 3 points Give one reason in favor of using the waterfall mo2. at view A fills the entire screen List the views that are redrawn in the order that they are drawn Be careful When E s x coordinate doubles it moves outside its parent s bounding box so it is clipped no longer visible on the screen Thus the only damaged part of the screen is E s original location which requires redrawing in order A C D 18 3 points Ben Bitdiddle complains that his user interface flickers when the user drags objects around the screen Which technique can he use to fix this problem Double buffering Antialiasing Subpixel rendering Event coalescing Alpha compositing mow gt Choose one A 19 4 points Draw the HSV color model and label each dimension with its full name See the Lecture 5 notes 20 3 points Give two ways that the Unix rm command which deletes files fails to meet the definition of a direct manipulation interface 1 no continuous visible representation 2 doesn t use physical actions or presses of labeled buttons 4 results are not immediately visible 3 results are not easily reversible 21 22 23 24 3 points Explain why red on blue text is hard to read Chromatic aberration The lens must focus differently for different wavelengths of light and since red and blue are on different ends of the visible spectrum the boundary between red and blue looks fuzzy 4 points Define internal external and metaphorical consistency You
3. del in this case and one reason in favor of iterative design Alarm clocks are well understood devices with many decades of iteration behind their requirements and user interfaces so a waterfall model might be reasonable for an alarm clock But an alarm clock designed for blind users may be less well understood and the developers who probably aren t blind may not be as familiar with a blind person s requirements and capabilities 5 3 points Explain what participatory design means in this case A blind person is an active participant on the design team not just a test subject 6 3 points Describe how a low fidelity prototype might be made for this case Physical materials like cardboard styrofoam or clay for prototyping the feel and tactile output of the alarm clock Sound effects like bells or human voice to prototype the audio interface 7 3 points Give one way that the Olympic Message System used iterative design The user manual underwent 200 iterations 8 3 points User centered design is defined by three principles one of which is iterative design What are the other two principles 1 early focus on users 2 continual evaluation 9 3 points List at least two different user classes of a conventional coin operated soda machine One possible answer soda buyers and the machine s loader 10 4 points Name the parts of the MVC pattern and give the primary responsibility of each part Mode
4. don t need to give examples internal consistency with other parts of the same interface external consistency with other interfaces on the same platform metaphorical consistency with a real world metaphor 4 points Give two reasons why hand drawn prototypes are good in the early stages of design 1 cheap to make 2 easy to throw away 3 users focus on issues that are important in the early stages rather than irrelevant details like color or font 3 points Which of the following is least likely to be revealed by a paper prototype A Your users don t know the term algorithm B Toolbar buttons are too small to press C A particular dialog box should be nonmodal because users need to access information under it D The Help menu isn t in the right place Choose one _B For the questions on this page consider the Microsoft Windows window resizing interface circled below o gt Discuss the advantages or disadvantages of this interface with respect to the following principles 25 3 points Affordances The three grooved lines offer an affordance for grasping 26 3 points Natural mapping The control is located directly on the corner that it will resize Dragging it outward or inward resizes the window in the same direction 27 3 points Feedback The mouse cursor changes to a double headed arrow when it hovers over the corner When the corner is dragged the window shows immediate feedback abo
5. l responsible for application data View responsible for display Controller responsible for handling input 11 3 points List all the places that the observer pattern appears in the MVC pattern View is an observer of the model Controller is sometimes an observer of the model 12 4 points List three ways that the view hierarchy is used in a GUI toolkit Output automatic redraw automatic clipping z order coordinate systems Input event dispatch and propagation Automatic layout 13 3 points Which of the following are related to working memory check all that apply __X____Elaborative rehearsal __X____ Maintenance rehearsal Perceptual fusion Open loop motor control X_ Chunking 14 4 points Assuming the mouse pointer starts at point M rank the buttons A B C and D by speed of access B_ slowest D C __A___ fastest 0 2 4 5 7 9 15 16 24 15 3 points Color blindness is caused by a problem in the A Lens B Retina C Iris D Aqueous humor Choose one ___B 16 17 The questions on this page use the view hierarchy shown below The hierarchy is shown on the left and its screen appearance is shown on the right A B C 4 points The mouse button is pressed somewhere inside E List the views that can receive this mouse press event in order E D A 4 points Suppose view E moves in such a way that its x coordinate doubles Assume that the toolkit is Swing and th
6. ut the new size of the window either as a wire frame or by resizing the actual window 28 3 points Give one general technique for making a mode less error prone Make it temporary Make it spring loaded like the Shift key Make it more visibly apparent 29 3 points Which of the following statements is not true about the UI toolkit described in the paper Glyphs Flyweight Objects for User Interfaces A Individual text characters are represented as components B Glyphs support automatic layout C A glyph must store its screen position D Glyphs are components as opposed to strokes or pixels Choose one _C__ 30 4 points State 5 of Nielsen s 10 heuristics Their names are enough 1 Match the real world 2 Consistency 3 Help amp documentation 4 User control amp freedom 5 Flexibility amp efficiency 6 Visibility of system status 7 Error prevention 8 Recognition not recall 9 Error diagnosis reporting and recovery 10 Aesthetic and minimalist design END OF QUIZ
Download Pdf Manuals
Related Search