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Question 1. Which component of the Model Human Processor is primarily responsible for translating visual input into a mental representation? A) Perceptual processor B) Cognitive processor C) Motor processor D) Memory buffer Answer: A Explanation: The perceptual processor handles sensory input (visual, auditory) and converts it into a form that the cognitive processor can use. Question 2. Miller’s Law states that the capacity of short-term memory is approximately: A) 3-4 chunks B) 5-9 chunks C) 10-12 chunks D) Unlimited chunks Answer: B Explanation: Miller’s classic finding is that people can hold about 7 ± 2 chunks of information in working memory. Question 3. According to Gestalt principles, which law explains why we tend to perceive a series of dots as a single line? A) Proximity B) Continuity C) Similarity D) Closure Answer: B Explanation: The law of continuity states that elements arranged on a line or curve are perceived as more related than those not on the line. Question 4. In Norman’s Seven Stages of Action, which stage directly follows “Forming the intention”? A) Specifying the sequence of actions B) Executing the action sequence
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C) Interpreting the system state D) Evaluating the outcome Answer: A Explanation: After forming an intention, the user specifies what actions must be taken to achieve the goal. Question 5. The “Gulf of Execution” refers to the gap between: A) User’s goal and the system’s feedback B) User’s intention and the actions required to achieve it C) System’s output and user’s perception D) Physical device and software interface Answer: B Explanation: The Gulf of Execution is the difficulty a user experiences in translating a goal into the correct actions. Question 6. Which HCI paradigm introduced the concept of “direct manipulation” with graphical objects? A) Batch processing B) Command-line interface C) Graphical User Interface (GUI) D) Virtual Reality Answer: C Explanation: Direct manipulation is a hallmark of GUIs, allowing users to interact with visual representations directly. Question 7. In Abowd and Beale’s Interaction Framework, the “Input” component includes: A) Physical device, sensor, and driver B) Application logic and database C) Presentation layer and rendering engine D) Network protocol and server Answer: A
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A) The person who pays for the system B) The individual who directly interacts with the product to achieve goals C) The maintenance engineer D) The regulatory authority Answer: B Explanation: Primary users are those whose tasks the system is designed to support directly. Question 12. Which research method is most suitable for uncovering tacit knowledge about users’ work practices? A) Structured survey B) Contextual inquiry C) A/B testing D) Card sorting Answer: B Explanation: Contextual inquiry involves observing users in their natural environment, revealing tacit workflows. Question 13. A “persona” that includes age, occupation, goals, and frustrations is primarily used to: A) Generate code skeletons B) Prioritize technical debt C) Keep design decisions user-centered D) Define server architecture Answer: C Explanation: Personas embody target users, helping teams align designs with real user needs. Question 14. In Hierarchical Task Analysis (HTA), the top-most node typically represents: A) A low-level motor action B) The overall goal of the task C) A decision point
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D) A system error message Answer: B Explanation: HTA starts with the high-level goal and decomposes it into sub-tasks. Question 15. Which of the following is an example of a “logical constraint” in interface design? A) A button that is physically large enough to press easily B) A dropdown list that disables options that are not applicable C) A color scheme that matches the brand palette D) An animation that guides the user’s eye Answer: B Explanation: Logical constraints prevent invalid actions by disabling or hiding inappropriate options. Question 16. Low-fidelity prototypes are preferred during early design because they: A) Provide realistic performance metrics B) Allow rapid iteration with minimal cost C) Support complex interaction logic D) Enable automated usability testing Answer: B Explanation: Low-fidelity (paper or sketch) prototypes are cheap and quick to modify, fostering early feedback. Question 17. Which prototyping fidelity is most suitable for evaluating visual hierarchy and typography? A) Paper prototype B) Wireframe mockup C) High-fidelity interactive prototype D) Storyboard animation Answer: C Explanation: High-fidelity prototypes render final visual design elements, allowing assessment of hierarchy and typography.
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B) Files can be nested within folders C) File names are case-sensitive on all platforms D) Deleting a file permanently removes it instantly Answer: B Explanation: Most users conceptualize files as hierarchically organized in folders. Question 22. Nielsen’s heuristic “Visibility of system status” means the system should: A) Offer unlimited customization options B) Keep the user informed about what is happening through feedback C) Minimize the number of screens D) Use obscure icons to save space Answer: B Explanation: Users need clear feedback (e.g., progress bars) to know the system’s current state. Question 23. Which heuristic violation is illustrated by a “Save” button that disappears after a form validation error? A) Consistency and standards B) Error prevention C) Recognition rather than recall D) Flexibility and efficiency of use Answer: A Explanation: Removing a familiar control breaks consistency, confusing users. Question 24. In a cognitive walkthrough, the evaluator asks: “Will the user know what to do at each step?” This focuses on: A) Learnability B) Efficiency C) Satisfaction D) Memorability Answer: A
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Explanation: Cognitive walkthrough assesses how easily a new user can figure out actions, i.e., learnability. Question 25. Which usability metric is most directly associated with “effectiveness”? A) Time-on-task B) Task success rate C) SUS score D) Number of clicks Answer: B Explanation: Effectiveness measures whether users can complete tasks successfully. Question 26. The System Usability Scale (SUS) yields a score ranging from: A) 0 to 50 B) 0 to 100 C) 1 to 5 D) 1 to 10 Answer: B Explanation: SUS provides a 0-100 score; higher values indicate better perceived usability. Question 27. According to Fitts’s Law, which target will be fastest to acquire? A) Small button far from cursor B) Large button close to cursor C) Small icon at the edge of the screen D) Large icon in the center of the screen Answer: B Explanation: Movement time decreases with larger target size and shorter distance. Question 28. In the GOMS model, the “Operators” component represents: A) High-level goals
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Answer: A Explanation: Criterion 1.1.1 mandates text alternatives for non-text content. Question 32. Which assistive technology translates screen content into synthesized speech? A) Screen reader B) Switch device c) Magnifier d) Voice dictation engine Answer: A Explanation: Screen readers read out UI elements for visually impaired users. Question 33. The “operable” WCAG principle primarily addresses: A) Readability of text B) Keyboard navigation and control C) Compatibility with browsers D) Use of color alone to convey meaning Answer: B Explanation: Operable ensures users can operate interface components, often via keyboard or other input. Question 34. In universal design, “flexible use” refers to: A) A design that works for a wide range of abilities B) Adjustable font sizes only c) Consistent color palettes d) Minimalist aesthetic Answer: A Explanation: Flexible use means the design accommodates diverse user preferences and abilities. Question 35. When localizing an application for Arabic, which UI adjustment is essential? A) Use of left-to-right icons
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B) Right-to-left layout mirroring C) Changing all colors to green D) Removing all images Answer: B Explanation: Arabic is a right-to-left language, requiring layout mirroring for proper reading flow. Question 36. Which data format change is required when adapting a UI for a locale that uses the metric system? A) Currency symbol placement B) Date order (day-month-year) C) Temperature display from Fahrenheit to Celsius D) Text direction Answer: C Explanation: Metric locales use Celsius, so temperature units must be converted. Question 37. In mobile HCI, the “fat-finger” problem is mitigated by: A) Smaller touch targets B) Increasing target size to at least 9- 10 mm C) Using hover states D) Removing all icons Answer: B Explanation: Larger touch targets reduce mis-taps caused by imprecise finger input. Question 38. Which gesture is most commonly associated with “undo” in touch interfaces? A) Double-tap B) Pinch-in C) Swipe left with two fingers D) Long press Answer: C
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A) It forces users to complete a task before returning to the main UI, potentially trapping keyboard focus b) It always uses bright colors c) It disables all screen readers d) It reduces network bandwidth Answer: A Explanation: Modals can trap focus, preventing keyboard navigation and screen-reader users from accessing other content. Question 43. Dark patterns violate ethical HCI principles by: A) Enhancing user privacy b) Manipulating users into unintended actions c) Improving load times d) Providing clear error messages Answer: B Explanation: Dark patterns are deceptive designs that coerce users into actions they may not want. Question 44. The “right to be forgotten” under data privacy regulations most directly impacts which HCI concern? A) Visual hierarchy b) Data deletion mechanisms in the UI c) Color contrast compliance d) Animation speed Answer: B Explanation: Interfaces must provide clear, accessible ways for users to request and confirm data removal. Question 45. Which of the following is a key advantage of using a “storyboard” in early design? A) Generates production-ready code b) Communicates user flow and context visually to stakeholders c) Measures system latency
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d) Conducts automated accessibility testing Answer: B Explanation: Storyboards illustrate scenarios and user interactions, facilitating shared understanding. Question 46. In hierarchical task analysis, an “operator” is best described as: A) The overall goal of the task b) A decision point that selects between methods c) The smallest indivisible action (e.g., click a button) d) The system’s error handling routine Answer: C Explanation: Operators are the atomic actions that compose higher-level tasks. Question 47. Which of the following is an example of a “physical constraint” in a UI? A) Graying out a menu item that is not applicable b) A plug shape that only fits one orientation c) A tooltip that explains a function d) A color that indicates status Answer: B Explanation: Physical constraints limit how a device can be used, preventing incorrect actions. Question 48. When conducting a formative usability test, the primary goal is to: A) Obtain a final SUS score for certification b) Identify major usability problems early for iterative redesign c) Compare two design variants statistically d) Measure long-term user satisfaction Answer: B Explanation: Formative testing seeks early feedback to guide design improvements.
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Answer: C Explanation: Error recovery includes providing ways to reverse unintended actions. Question 53. In a high-fidelity prototype, which of the following is typically NOT included? A) Realistic visual design b) Interactive navigation c) Backend database connectivity d) Simulated animations Answer: C Explanation: High-fidelity prototypes focus on front-end behavior; they rarely integrate full backend systems. Question 54. Which of these is a common method for evaluating the “learnability” of a new interface? A) Heuristic evaluation b) Cognitive walkthrough c) A/B testing d) SUS questionnaire Answer: B Explanation: Cognitive walkthrough simulates a new user’s learning process step by step. Question 55. When designing for users with motor impairments, which design choice improves accessibility? A) Small clickable icons b) High contrast text only c) Large target areas with sufficient spacing d) Auto-playing videos Answer: C Explanation: Larger, well-spaced targets reduce the precision required for motor-impaired users.
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Question 56. Which of the following best describes “responsive design”? A) Adjusting UI layout based on device screen size and orientation b) Providing audio feedback for all actions c) Using only vector graphics d) Implementing dark mode automatically Answer: A Explanation: Responsive design adapts the interface to different viewport dimensions. Question 57. In the context of internationalization, “locale-aware formatting” primarily affects: A) Icon shape b) Date, time, number, and currency presentation c) Keyboard shortcuts d) Network latency Answer: B Explanation: Locale-aware formatting customizes how dates, numbers, and currencies appear for each region. Question 58. Which of the following is a recommended practice for designing color-blind-friendly interfaces? A) Rely solely on color to convey status b) Use texture or shape in addition to color c) Use only red and green d) Avoid all colors Answer: B Explanation: Adding non-color cues ensures information is perceivable by users with color vision deficiencies. Question 59. A “modal” window that can be dismissed by pressing the Escape key demonstrates compliance with which usability heuristic? A) Error prevention b) Visibility of system status
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Question 63. Which of the following is an example of “cultural affordance”? A) A button shaped like a hand that points right, indicating “next” in left-to-right cultures b) A universally recognized “play” triangle c) Standard keyboard shortcuts d) A tooltip that appears on hover Answer: A Explanation: Cultural affordances rely on learned conventions specific to a culture (e.g., directionality). Question 64. When performing a heuristic evaluation, the evaluator should: A) Test with real users in a lab setting b) Apply the heuristics systematically to the interface without users c) Run automated scripts to detect violations d) Conduct a survey after interaction Answer: B Explanation: Heuristic evaluation is an expert review using predefined usability principles. Question 65. In eye-tracking studies, a “fixation” is defined as: A) The rapid movement of the eye between points b) A moment when the gaze remains within a small area for at least 100- 300 ms c) The total number of saccades per minute d) The overall time spent on a task Answer: B Explanation: Fixations indicate where visual attention is concentrated. Question 66. Which of the following best illustrates a “fallback” mechanism for a voice interface? A) Switching to a text chat when speech recognition fails b) Increasing the volume automatically c) Changing the language of the response
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d) Displaying a loading spinner Answer: A Explanation: Providing an alternative interaction mode ensures continuity when speech fails. Question 67. The “principle of least astonishment” suggests that: A) Interfaces should always be novel and surprising b) System behavior should match user expectations to avoid confusion c) Users should be forced to learn new shortcuts frequently d) All options must be displayed simultaneously Answer: B Explanation: Users expect familiar behavior; violating it leads to surprise and errors. Question 68. Which of the following UI elements is most appropriate for selecting a single value from a short list on a mobile device? A) Radio button group b) Dropdown menu c) Slider d) Toggle switch Answer: A Explanation: Radio buttons are easy to tap and clearly show all options for short lists. Question 69. In the context of HCI, “feedback latency” longer than 100 ms is likely to: A) Be unnoticed by users b) Degrade perceived responsiveness and increase error rates c) Improve learning speed d) Reduce cognitive load Answer: B Explanation: Delays above ~100 ms break the illusion of immediate response, harming usability.
