Can you sit the React Native Certification today?

In the Animated API, what does .start() do?

• AIt permanently pauses the animation before it can run
• BIt resets the Animated.Value back to its initial value with no animation
• CIt kicks off the configured animation (e.g. from Animated.timing(...) or Animated.spring(...)), optionally accepting a completion callback that fires once the animation finishes or is stopped
• DIt is only used for testing, never in production code

Why would an app combine a drawer navigator, a tab navigator, and several stack navigators, nested inside one another, rather than picking just one?

• ABecause each navigator solves a different UI pattern (a slide-out menu for broad sections, persistent tabs for quick switching, and push/pop stacks for drilling into detail), and real apps commonly need more than one of those patterns at once
• BBecause React Navigation requires at least three navigator types to be registered before the app will build
• CBecause nesting navigators is required to enable TypeScript support
• DBecause a single navigator type can only render a maximum of five screens

A screen shows a short, fixed list of 5 settings toggles that will never grow. Which component is a reasonable, simple choice, and why?

• AFlatList, because virtualization is always mandatory regardless of list size
• BScrollView is perfectly reasonable here — the content is small and bounded, so there's no meaningful performance cost to rendering all 5 items immediately, and it avoids the extra ceremony (keyExtractor, renderItem) FlatList expects
• CSectionList, because any list with more than one item must use SectionList
• DNeither; fixed lists must be built with individually absolutely-positioned Views

A login form's email field should discourage auto-capitalizing the first letter and ideally show an email-optimized keyboard layout. Which two props help with this?

• AsecureTextEntry and multiline
• BhitSlop and onPress
• Cstyle and onLayout
• DautoCapitalize="none" (stopping automatic capitalization) and keyboardType="email-address" (surfacing an email-friendly keyboard, e.g. with an easily accessible @ key)

What is Platform.select({...}) used for?

• ASelecting which native module version to bundle at build time, unrelated to runtime behavior
• BChoosing between light and dark mode styles
• CDeclaratively picking a value (a style object, a number, a component, etc.) based on the current platform in one expression, e.g. Platform.select({ ios: 20, android: 16, default: 18 })
• DSelecting a random value for A/B testing