Mobile App Design Mobile App Design MCQ 3 — Questions and Answers
Question 1: What is the primary purpose of using a 'card' component in mobile UI design?
- To reduce the number of screens needed
- To group related content and actions as a single unit (Correct answer)
- To replace the need for navigation menus
- To display full-screen modal dialogs
Correct answer: To group related content and actions as a single unit
Cards group related information and actions, creating a clear visual container that helps users understand which elements belong together.
Question 2: Which principle does 'Fitts's Law' most directly apply to in mobile UI design?
- Color contrast for readability
- The size and placement of interactive touch targets (Correct answer)
- Minimizing the number of screens in a user flow
- Choosing appropriate typography scale
Correct answer: The size and placement of interactive touch targets
Fitts's Law states that the time to reach a target depends on its size and distance, so mobile designers make important buttons large and easy to tap.
Question 3: In iOS design guidelines, what is the recommended minimum touch target size?
- 24x24 pt
- 34x34 pt
- 44x44 pt (Correct answer)
- 56x56 pt
Correct answer: 44x44 pt
Apple's Human Interface Guidelines specify a minimum touch target size of 44x44 points to prevent accidental taps on adjacent elements.
Question 4: What design pattern is used to let users access a set of actions related to a specific item by sliding it horizontally?
- Pull-to-refresh
- Swipe actions (swipe-to-reveal) (Correct answer)
- Expandable list item
- Context menu
Correct answer: Swipe actions (swipe-to-reveal)
Swipe actions reveal contextual options (like delete or archive) when a user swipes a list item left or right.
Question 5: What is 'chunking' in the context of mobile form design?
- Breaking large data requests into smaller API calls
- Grouping related form fields together to reduce cognitive load (Correct answer)
- Using inline validation on each field as it is typed
- Splitting a long form across multiple screens
Correct answer: Grouping related form fields together to reduce cognitive load
Chunking groups related fields (e.g., all billing info together) so users can process the form in manageable sections.
Question 6: Which metric best measures how efficiently users can learn to use a new mobile interface?
- Net Promoter Score (NPS)
- Time on task for first-time users (Correct answer)
- Daily Active Users (DAU)
- App store rating
Correct answer: Time on task for first-time users
Time on task for first-time users measures learnability by capturing how quickly new users can complete tasks without prior experience.
Question 7: In material design, what is the 'z-axis' used to express?
- Screen brightness levels for AMOLED displays
- Elevation and depth of UI elements using shadows (Correct answer)
- The order of animations in a transition
- The z-index stacking of overlapping text layers
Correct answer: Elevation and depth of UI elements using shadows
Material Design uses the z-axis to convey elevation — higher elements cast larger shadows, creating a sense of physical depth and hierarchy.
Mobile App Design Mobile App Design MCQ 3
What is the primary purpose of using a 'card' component in mobile UI design?