Given a Set of Requirements, Describe the Process for Designing Lightning Components. PLATFORM-DEVELOPER-II Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   What is the primary purpose of writing unit tests for a Lightning component's Apex controller?

   • ATo check the component's accessibility
   • BTo ensure the Apex methods return the expected results and handle errors correctly
   • CTo measure the performance of the component
   • DTo verify that the component's UI renders correctly
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   Which Lightning Data Service component is used to display and edit a record's fields in a form layout?

   • Alightning:inputField
   • Blightning:recordViewForm
   • Clightning:recordEditForm
   • Dlightning:recordForm
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4. 8foundation · easy

   In a Lightning component, how can a parent component pass data to a child component?

   • ABy firing a component event from the parent
   • BBy setting an attribute on the child component in the parent's markup
   • CBy using a shared global variable
   • DBy calling a method on the child component using Aura APIs
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5. 9application · medium

   A Lightning component contains a child component that displays a list of items. When a user clicks an item, the parent component needs to update a detail panel. The child and parent are in a direct parent-child relationship. Which communication method is most appropriate?

   • AUse a wire adapter to refresh the parent when the child changes.
   • BUse a component event fired by the child and handled by the parent.
   • CUse a callback function passed from the parent to the child as an attribute.
   • DUse an application event fired by the child and handled by the parent.
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6. 10application · medium

   A developer is building a Lightning component that will be used on both desktop and mobile. The component must be responsive and accessible. Which approach is most aligned with Lightning Design System (SLDS) best practices?

   • AUse a fixed-width layout to ensure consistent appearance across devices.
   • BUse only SLDS components and avoid any custom styling.
   • CUse custom CSS media queries to adjust the layout for different screen sizes.
   • DUse SLDS utility classes for spacing and layout, and ensure all interactive elements have appropriate ARIA labels.
   Reveal Solution Discussion Select an answer first