React Native Component Usage Quiz

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Questions and Answers

What is the purpose of the 'useState' hook in the given React component?

To perform data fetching in functional components

To handle side effects in functional components

To create context in functional components

To manage state in functional components (correct)

Which library is being used for swipeable list view in the given React component?

AsyncStorage

react-native-swipe-list-view (correct)

react-native-linear-gradient

react-native-shimmer-placeholder

What does the 'useEffect' hook do in the given React component?

Implements side effects in functional components (correct)

Manages global state in functional components

Renders the component on the screen

Performs routing in functional components

Which hook is used for accessing context in the given React component?

useContext Signup and view all the answers

What is the purpose of the 'Animated' import in the given React component?

For animating UI components Signup and view all the answers

Which icon library is being used for rendering icons in the given React component?

@./././assets/icons/ Signup and view all the answers

What is the purpose of the 'fetchQuestions' function?

To fetch quiz questions from the API Signup and view all the answers

What does the 'pollInterval' variable do?

It sets the interval for fetching new quiz questions Signup and view all the answers

What is the purpose of the 'ListHeader' component?

To render the header for the quiz list Signup and view all the answers

What does the 'renderQuestionItem' function do?

It renders each individual quiz question item Signup and view all the answers

What does the 'renderHiddenItem' function do?

It renders the delete button for each question Signup and view all the answers

What is the purpose of the 'StatusText' component?

To display and update status messages during question generation Signup and view all the answers

What does the 'ListFooter' component do?

It renders the footer for the quiz list Signup and view all the answers

What is the purpose of the 'handlePressIn' function?

It initiates an animation to scale down a button when pressed Signup and view all the answers

What does the 'handlePressOut' function do?

It initiates an animation to scale back a button after being pressed Signup and view all the answers

What is the purpose of the 'slideAnim' variable?

It controls animations for sliding elements on and off screen Signup and view all the answers

What is the role of 'modalContainer' in the styles?

To define styles for a container with position set to absolute at the bottom of the screen Signup and view all the answers

What does 'difficultyContainer' define in the styles?

A container with flex direction set to row and space-between justification Signup and view all the answers

Study Notes

useState Hook

Enables state management within functional components, allowing the component to retain data between renders.

Swipeable List View Library

The component utilizes a library, often react-native-swipeable-list, for implementing swipeable list functionalities.

useEffect Hook

Manages side effects in the component, such as fetching data or subscribing to events, based on specific dependencies.

Context Access Hook

The context is accessed using the useContext hook, facilitating access to global data throughout the component tree.

Animated Import Purpose

The Animated import is used for creating smooth animations, enhancing user experience through visual feedback.

Icon Library

The component employs an icon library, typically react-native-vector-icons, for rendering scalable vector icons.

fetchQuestions Function

Fetches a list of questions from a specified API or source, populating the state with the retrieved data.

pollInterval Variable

Defines the time interval for polling the data source, controlling how often the component fetches updated information.

ListHeader Component

Renders a header for the list, providing context or navigation options related to the listed items.

renderQuestionItem Function

Responsible for defining how each question item is displayed in the list, including layout and styling.

renderHiddenItem Function

Manages the rendering of hidden elements in swipeable list items, typically for action buttons or additional options.

StatusText Component

Displays status messages or indicators related to the list or the component’s state, guiding user awareness.

ListFooter Component

Appends a footer to the list, often used for loading indicators or additional information when scrolling.

handlePressIn Function

Captures and processes touch events when a user presses an item, often used to initiate animations or effects.

handlePressOut Function

Completes touch event handling after the user releases an item, finalizing any effects or interactions.

slideAnim Variable

Represents an animated value used for controlling the sliding transition of elements within the component.

modalContainer Role in Styles

Defines styles specific to the modal, ensuring proper layout and presentation when displayed.

difficultyContainer Definition in Styles

Specifies styling for elements that indicate the difficulty level of items, contributing to visual hierarchy and user understanding.

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Description

Test your knowledge of React Native component usage with this quiz. Identify and understand different components and their functionalities in a React Native environment.