Module quiz: Lists and Text Input in React Native :React Native (Meta iOS Developer Professional Certificate) Answers 2026

Question 1

You need to display a large list of items in your app while maintaining solid performance. Which components could you use to accomplish this? Select all that apply.

✅ FlatList
✅ SectionList
❌ ScrollView

Explanation:
FlatList aur SectionList virtualized lists hain, jo sirf visible items render karte hain. ScrollView sab items ek sath render karta hai, jo large lists ke liye slow hota hai.

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Question 2

The keyExtractor is a required prop to both the FlatList and SectionList components.

❌ False

Explanation:
keyExtractor recommended hai, but required nahi. Agar item me already key ya id ho, to optional ho jata hai.

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Question 3

Which feature is NOT supported by the FlatList component?

❌ Fully cross-platform
❌ Pull to refresh support
❌ Header, footer, and separator support
✅ Sectional support

Explanation:
Section-based lists ke liye SectionList use hota hai, FlatList nahi.

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Question 4

Observe the emulator screenshot below; which one of the following code snippets will produce this output on the emulator?
(Username input screen)

✅ First code snippet
❌ Second code snippet

Explanation:
First snippet complete aur correct structure follow karta hai (state + TextInput binding).

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Question 5

Which method would you use to make a native text input lose focus?

❌ focus()
❌ isFocused()
✅ blur()

Explanation:
blur() method se TextInput ka focus hata diya jata hai (keyboard dismiss hota hai).

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Question 6

Which one of these props are used to configure a separator component between each item in the FlatList?

❌ ListSeparatorComponent
❌ SectionSeparatorComponent
✅ ItemSeparatorComponent

Explanation:
ItemSeparatorComponent har item ke beech separator add karta hai.

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Question 7

The SectionList component can be rendered without providing the sections prop to it.

❌ False

Explanation:
SectionList ke liye sections prop mandatory hota hai.

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Question 8

Observe the output on the emulator screenshot below, and determine what component you would use to display this list of items within your app.
(More items load on scroll)

❌ ScrollView
❌ SectionList
✅ FlatList

Explanation:
Simple scrolling list (without sections) ke liye FlatList best choice hai.

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Question 9

Select all the keyboard types that are supported cross-platform by the TextInput component.

❌ web-search
✅ number-pad
✅ email-address
❌ phone-pad

Explanation:
number-pad aur email-address iOS & Android dono me supported hain.

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Question 10

Internal state is preserved when the content is scrolled out of the screen in which of these components?

❌ FlatList
❌ SectionList
✅ ScrollView

Explanation:
ScrollView items ko unmount nahi karta, isliye internal state preserve rehti hai. FlatList / SectionList virtualization use karte hain.

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🧾 Summary Table

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