WGU COURSE ASSESSMENT
WGU D279 User Interface Design Final Submission Task
2026/2027
Complete Blueprint Coverage A+
A+ 5 100%
QUESTIONS VERIFIED CORE DOMAINS COVERED RATIONALES INCLUDED
CATEGORIES
UI Design Principles and Foundations
User Research and Usability
Interaction Design and Prototyping
Visual Design and Accessibility
Evaluation, Testing, and Iteration
STUVIAACTUALEXAM
,WGU D279 User Interface Design Final Submission Task 2026/2027 Page 2
UI DESIGN PRINCIPLES AND FOUNDATIONS
Q1
A design team is redesigning a mobile banking app. Users frequently abandon the transfer flow after three steps. The
lead designer applies Fitts’s Law to diagnose the problem. The team must identify which interface change most
directly addresses the law’s implications for target acquisition time.
A. Add more confirmation dialogs to increase perceived security
B. Increase the size and reduce the distance of the primary action button on each transfer screen
C. Replace all icons with text labels to improve recognition
D. Move the entire transfer feature into a separate web portal
Correct Answer: B
Fitts’s Law states that the time to acquire a target is a function of the distance to and size of the target. Enlarging the primary action
and reducing its distance from the user’s current focus directly lowers acquisition time and friction in the multi-step flow.
Q2
An e-commerce checkout page displays a long form with required fields scattered among optional ones. Completion
rates are low. Applying the principle of progressive disclosure, the designer must choose the most effective
restructuring.
A. Place required fields in a modal that appears after the user clicks Submit
B. Display every possible field on a single scrolling page so users see the full scope
C. Remove all optional fields permanently to shorten the form
D. Show only essential fields first and reveal additional options after the user advances
Correct Answer: D
Progressive disclosure presents only necessary information at each step and reveals complexity as needed. Showing essential
fields first reduces cognitive load and abandonment while still allowing access to optional data later.
Q3
A productivity application uses a dense toolbar with more than twenty icons of similar visual weight. Users report
difficulty locating frequently used commands. The designer applies the principle of visual hierarchy to improve
findability.
A. Add animated hover effects to all icons without changing relative emphasis
B. Make every icon identical in size and color so the interface appears uniform
C. Remove the toolbar entirely and rely only on keyboard shortcuts
D. Increase size, contrast, and spacing for the most frequently used commands while de-emphasizing secondary ones
Correct Answer: D
Visual hierarchy guides attention through differences in size, contrast, color, and position. Emphasizing high-frequency commands
while subordinating others helps users locate primary actions more quickly.
STUVIAACTUALEXAM
, WGU D279 User Interface Design Final Submission Task 2026/2027 Page 3
Q4
A travel booking interface allows users to select dates, destinations, and passenger counts on a single screen. After a
usability test, participants report feeling overwhelmed. The designer evaluates the interface against Miller’s Law.
A. Force users to complete each choice on a separate full-screen step without overview
B. Increase the number of simultaneous options so users feel they have complete control
C. Remove all labels and rely solely on icons to reduce visual noise
D. Group related controls into clearly labeled chunks of roughly seven or fewer items to respect working-memory limits
Correct Answer: D
Miller’s Law indicates that working memory typically holds about seven plus or minus two chunks of information. Grouping related
controls into smaller, labeled sets reduces cognitive load and improves decision quality.
Q5
A SaaS dashboard uses a left navigation rail that remains visible on every page. Users frequently lose track of their
current location within the application. The designer applies the principle of wayfinding and system status visibility.
A. Highlight the active navigation item and add a persistent breadcrumb or page title that confirms the current context
B. Hide the navigation rail after the first click to maximize content area
C. Use identical styling for active and inactive items to maintain visual consistency
D. Replace the navigation rail with a single global search bar
Correct Answer: A
Clear indication of current location is a core usability heuristic. Highlighting the active item and providing breadcrumbs or page titles
gives users continuous feedback about where they are in the system.
Q6
A form validation system displays error messages only after the user presses the final Submit button. Users express
frustration when they discover multiple errors at once. The designer revises the feedback timing according to best
practices for error prevention and recovery.
A. Remove all validation to avoid interrupting the user’s flow
B. Provide inline validation as the user leaves each field so errors can be corrected immediately
C. Show a single generic error message at the top of the page after submission
D. Disable the Submit button permanently until an administrator reviews the form
Correct Answer: B
Immediate, field-level feedback allows users to correct mistakes while the context is still fresh. Batch error reporting after
submission increases cognitive load and abandonment risk.
STUVIAACTUALEXAM
WGU D279 User Interface Design Final Submission Task
2026/2027
Complete Blueprint Coverage A+
A+ 5 100%
QUESTIONS VERIFIED CORE DOMAINS COVERED RATIONALES INCLUDED
CATEGORIES
UI Design Principles and Foundations
User Research and Usability
Interaction Design and Prototyping
Visual Design and Accessibility
Evaluation, Testing, and Iteration
STUVIAACTUALEXAM
,WGU D279 User Interface Design Final Submission Task 2026/2027 Page 2
UI DESIGN PRINCIPLES AND FOUNDATIONS
Q1
A design team is redesigning a mobile banking app. Users frequently abandon the transfer flow after three steps. The
lead designer applies Fitts’s Law to diagnose the problem. The team must identify which interface change most
directly addresses the law’s implications for target acquisition time.
A. Add more confirmation dialogs to increase perceived security
B. Increase the size and reduce the distance of the primary action button on each transfer screen
C. Replace all icons with text labels to improve recognition
D. Move the entire transfer feature into a separate web portal
Correct Answer: B
Fitts’s Law states that the time to acquire a target is a function of the distance to and size of the target. Enlarging the primary action
and reducing its distance from the user’s current focus directly lowers acquisition time and friction in the multi-step flow.
Q2
An e-commerce checkout page displays a long form with required fields scattered among optional ones. Completion
rates are low. Applying the principle of progressive disclosure, the designer must choose the most effective
restructuring.
A. Place required fields in a modal that appears after the user clicks Submit
B. Display every possible field on a single scrolling page so users see the full scope
C. Remove all optional fields permanently to shorten the form
D. Show only essential fields first and reveal additional options after the user advances
Correct Answer: D
Progressive disclosure presents only necessary information at each step and reveals complexity as needed. Showing essential
fields first reduces cognitive load and abandonment while still allowing access to optional data later.
Q3
A productivity application uses a dense toolbar with more than twenty icons of similar visual weight. Users report
difficulty locating frequently used commands. The designer applies the principle of visual hierarchy to improve
findability.
A. Add animated hover effects to all icons without changing relative emphasis
B. Make every icon identical in size and color so the interface appears uniform
C. Remove the toolbar entirely and rely only on keyboard shortcuts
D. Increase size, contrast, and spacing for the most frequently used commands while de-emphasizing secondary ones
Correct Answer: D
Visual hierarchy guides attention through differences in size, contrast, color, and position. Emphasizing high-frequency commands
while subordinating others helps users locate primary actions more quickly.
STUVIAACTUALEXAM
, WGU D279 User Interface Design Final Submission Task 2026/2027 Page 3
Q4
A travel booking interface allows users to select dates, destinations, and passenger counts on a single screen. After a
usability test, participants report feeling overwhelmed. The designer evaluates the interface against Miller’s Law.
A. Force users to complete each choice on a separate full-screen step without overview
B. Increase the number of simultaneous options so users feel they have complete control
C. Remove all labels and rely solely on icons to reduce visual noise
D. Group related controls into clearly labeled chunks of roughly seven or fewer items to respect working-memory limits
Correct Answer: D
Miller’s Law indicates that working memory typically holds about seven plus or minus two chunks of information. Grouping related
controls into smaller, labeled sets reduces cognitive load and improves decision quality.
Q5
A SaaS dashboard uses a left navigation rail that remains visible on every page. Users frequently lose track of their
current location within the application. The designer applies the principle of wayfinding and system status visibility.
A. Highlight the active navigation item and add a persistent breadcrumb or page title that confirms the current context
B. Hide the navigation rail after the first click to maximize content area
C. Use identical styling for active and inactive items to maintain visual consistency
D. Replace the navigation rail with a single global search bar
Correct Answer: A
Clear indication of current location is a core usability heuristic. Highlighting the active item and providing breadcrumbs or page titles
gives users continuous feedback about where they are in the system.
Q6
A form validation system displays error messages only after the user presses the final Submit button. Users express
frustration when they discover multiple errors at once. The designer revises the feedback timing according to best
practices for error prevention and recovery.
A. Remove all validation to avoid interrupting the user’s flow
B. Provide inline validation as the user leaves each field so errors can be corrected immediately
C. Show a single generic error message at the top of the page after submission
D. Disable the Submit button permanently until an administrator reviews the form
Correct Answer: B
Immediate, field-level feedback allows users to correct mistakes while the context is still fresh. Batch error reporting after
submission increases cognitive load and abandonment risk.
STUVIAACTUALEXAM
