Asynchronous Processes and Threading Quiz

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Questions and Answers

What lifecycle hook can be used to check the orientation every time the component becomes active?

  • componentWillMount (correct)
  • componentDidMount
  • componentDidUpdate
  • componentWillUpdate

Which property can be set in the View to call a function when a layout is triggered?

  • onCheck
  • onPress
  • onLayout (correct)
  • onRender

In React Native, what type of View can be used to display external content from a webpage?

  • WebView (correct)
  • ScrollView
  • Modal
  • ImageBackground

What library in React Native is used for linking external sites or other apps on the device?

<p>Linking (B)</p> Signup and view all the answers

When using static URLs with WebView, what property is set with the URL of the webpage to display?

<p>url (B)</p> Signup and view all the answers

In React Native, what navigation element is used in the example to switch between a list of buttons and a WebView?

<p>StackNavigator (B)</p> Signup and view all the answers

What is the main benefit of using an asynchronous process in programming?

<p>Avoiding holding up the entire program for one long step (C)</p> Signup and view all the answers

In what scenario would using an asynchronous process NOT be beneficial?

<p>When immediate completion of all tasks is required (D)</p> Signup and view all the answers

What role does the call back function play in an asynchronous process?

<p>It alerts the main thread about the completion of the asynchronous task (A)</p> Signup and view all the answers

How does threading help in implementing an asynchronous process?

<p>By delegating tasks to another thread, allowing them to run concurrently (B)</p> Signup and view all the answers

Which statement best describes the purpose of starting an asynchronous process in a main thread?

<p>To allow the main thread to continue executing without waiting for the asynchronous task to complete (D)</p> Signup and view all the answers

When would a program benefit from using synchronous processing instead of asynchronous processing?

<p>When real-time responses are required (C)</p> Signup and view all the answers

What is the purpose of the 'Activity Life Cycle' in Android development?

<p>To manage the creation and destruction of activities in the app (C)</p> Signup and view all the answers

How do Android life cycles differ from the general sequence of events mentioned in the text?

<p>Android life cycles refer to a set of steps within the Main Loop phase for each view (D)</p> Signup and view all the answers

What analogy is used to describe the Android life cycles in relation to threads?

<p>Android life cycles are akin to individual threads within a larger sequence (C)</p> Signup and view all the answers

What role does the 'Activity class' play in Android development?

<p>It creates windows for UI elements and interacts with users (A)</p> Signup and view all the answers

In which phase of the app's life cycle does the 'Activity Life Cycle' become crucial?

<p>Main Loop phase (C)</p> Signup and view all the answers

How can the 'Activity Life Cycle' be defined in Android terms?

<p>'Activity Life Cycle' denotes handling activities and UI interaction in Android apps (B)</p> Signup and view all the answers

What are the main folders in the Data Container for storing data?

<p>Documents, Library, Temp (C)</p> Signup and view all the answers

What is the primary advantage of using remote storage?

<p>Ability to access data from any device (B)</p> Signup and view all the answers

Why is setting up remote storage more complicated than local storage?

<p>Requires networking setup (A)</p> Signup and view all the answers

What is the major disadvantage of relying on remote storage for data?

<p>Dependence on network connection (A)</p> Signup and view all the answers

In what scenario can remote storage be particularly beneficial for users?

<p>When users need access to their data across different devices (D)</p> Signup and view all the answers

How does remote storage typically compare to local storage in terms of capacity?

<p>Remote storage is often larger (A)</p> Signup and view all the answers

What is the recommended approach when the network connection drops?

<p>Save any changes the User makes and POST them after connection is restored (B)</p> Signup and view all the answers

What is the purpose of having a variable in state to track the network connection status?

<p>To track if the user is online or offline (A)</p> Signup and view all the answers

What role does the NetInfo package play in syncing data?

<p>It determines the network state and notifies when it changes (B)</p> Signup and view all the answers

Why is it important to use lifecycle hooks when detecting changes made by the User?

<p>To ensure immediate response to any user action (A)</p> Signup and view all the answers

What does setting a flag for queued changes help achieve in the sync process?

<p>Helps in identifying which changes need to be re-sent after connection restoration (B)</p> Signup and view all the answers

What role does the callback function play in handling queued changes during connection restoration?

<p>Calls the POST function to submit any queued changes (B)</p> Signup and view all the answers

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