Mobile App Design Basic 2 — Questions and Answers
Question 1: What is the recommended minimum touch target size for interactive elements in mobile apps according to Google's Material Design guidelines?
- 32x32 dp
- 48x48 dp (Correct answer)
- 24x24 dp
- 64x64 dp
Correct answer: 48x48 dp
Google's Material Design guidelines recommend a minimum touch target size of 48x48 dp to ensure usability for most users.
Question 2: Which mobile UI pattern is best suited for apps with 3-5 top-level navigation destinations?
- Hamburger drawer
- Bottom navigation bar (Correct answer)
- Tab bar at the top
- Floating action button
Correct answer: Bottom navigation bar
A bottom navigation bar is ideal for 3-5 top-level destinations because it keeps primary navigation thumb-accessible and always visible.
Question 3: What does 'density-independent pixel' (dp) measure in Android mobile design?
- The physical pixel count on screen
- A unit that scales with screen density to maintain consistent visual size (Correct answer)
- The color depth of a pixel
- The refresh rate of the display
Correct answer: A unit that scales with screen density to maintain consistent visual size
A dp is an abstract unit that scales based on screen density so UI elements appear the same physical size across different devices.
Question 4: What is 'progressive disclosure' in mobile app design?
- Revealing all features immediately on first launch
- Showing additional information or options only when needed (Correct answer)
- Displaying a privacy policy during onboarding
- Gradually increasing app permissions over time
Correct answer: Showing additional information or options only when needed
Progressive disclosure reduces cognitive load by presenting only essential information initially and revealing details on demand.
Question 5: Which gesture is typically used to dismiss a modal sheet in iOS apps?
- Double tap
- Long press
- Swipe down (Correct answer)
- Pinch inward
Correct answer: Swipe down
Swiping down is the standard iOS gesture to dismiss a modal sheet, following Apple's Human Interface Guidelines.
Question 6: What is the primary purpose of a splash screen in a mobile app?
- To display advertisements before the app loads
- To show branding while the app initializes (Correct answer)
- To collect user data before access is granted
- To run a tutorial for new users
Correct answer: To show branding while the app initializes
A splash screen displays the app's brand identity during initialization, giving users visual feedback that the app is loading.
Question 7: In mobile design, what is 'thumb zone' ergonomics?
- A temperature sensitivity setting for touchscreens
- The area of a phone screen most comfortably reachable by the thumb (Correct answer)
- A haptic feedback pattern for alerts
- A pinch-to-zoom gesture region
Correct answer: The area of a phone screen most comfortably reachable by the thumb
Thumb zone ergonomics maps the areas of a phone screen that are easy, okay, or hard to reach with the thumb for one-handed use.
Mobile App Design Basic 2
What is the recommended minimum touch target size for interactive elements in mobile apps according to Google's Material Design guidelines?