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Lecture 1 quiz and short answer
45 Questions
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Lecture 1 quiz and short answer

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Questions and Answers

What is the main advantage of using the Model-View-Controller (MVC) design pattern in applications?

  • Enhanced data encapsulation and processing (correct)
  • Improved user interface design
  • Faster communication with external servers
  • Simplified user interactions

    • Which components can be activated by an Intent in Android?

  • Activities, services, and broadcast receivers (correct)
  • Services and broadcast receivers only
  • Content providers only
  • Content providers and Services

    • When is a Content Provider activated in Android?

  • When a data synchronization occurs
  • When targeted by a request from a ContentResolver (correct)
  • When using an Intent
  • When a broadcast message is sent

    • What is the role of a ContentResolver in Android?

    <p>Handles direct transactions with the content provider</p> Signup and view all the answers

    Which Android component is not directly activated by an Intent?

    <p>Content Provider</p> Signup and view all the answers

    What type of object is used to specify the intention to have something done in Android?

    <p>Intent</p> Signup and view all the answers

    In Android, what initiates the activation of Activities within an application?

    <p>Intent by class name</p> Signup and view all the answers

    What is the main purpose of sync adapters in Android?

    <p>To synchronize data between different devices</p> Signup and view all the answers

    How does a Broadcast Receiver function in Android?

    <p>A Broadcast Receiver enables the system to deliver events to the app outside of the regular user flow.</p> Signup and view all the answers

    Give an example of a system event that triggers a broadcast in Android.

    <p>When the system boots up or the device starts charging.</p> Signup and view all the answers

    What is the purpose of an intent filter in Android?

    <p>To specify the type of intents that a component would like to receive.</p> Signup and view all the answers

    What is the difference between explicit and implicit intents in Android?

    <p>Explicit intents specify the component by name, while implicit intents declare a general action to perform.</p> Signup and view all the answers

    What caution should be taken when starting a Service in Android?

    <p>Always use an explicit intent when starting a Service.</p> Signup and view all the answers

    What happens when you call bindService() with an implicit intent in Android 5.0 (API level 21) and above?

    <p>The system throws an exception.</p> Signup and view all the answers

    What are the three states an Android app can be in?

    <p>Active, Paused, Stopped</p> Signup and view all the answers

    Which component is considered the most basic in an Android application?

    <p>Activity</p> Signup and view all the answers

    What is the main advantage of using implicit intents in Android?

    <p>It allows the system to find a component that can perform the action and start it.</p> Signup and view all the answers

    What is the purpose of a Service in Android?

    <p>To perform background tasks like playing music or fetching data without blocking user interaction.</p> Signup and view all the answers

    What method is used to start a service in Android?

    <p>By passing an Intent to startService().</p> Signup and view all the answers

    When are Content Providers used in Android?

    <p>Content Providers are used when one application needs to share its data with other applications.</p> Signup and view all the answers

    What is the main purpose of Sync Adapters in Android?

    <p>Sync Adapters are used to synchronize data between the device and a server or other data source.</p> Signup and view all the answers

    What is the role of an Intent in Android?

    <p>An Intent is used to specify the intention to have something done in Android, such as starting a service or activity.</p> Signup and view all the answers

    What component in Android can easily synchronize data with cloud services?

    <p>Sync adapters</p> Signup and view all the answers

    How are Activities, services, and broadcast receivers activated in Android?

    <p>By an Intent</p> Signup and view all the answers

    What is the main purpose of a ContentResolver in Android?

    <p>To handle all direct transactions with the content provider</p> Signup and view all the answers

    When is a Content Provider activated in Android?

    <p>When targeted by a request from a ContentResolver</p> Signup and view all the answers

    How can a new instance of an Activity be started in Android?

    <p>By passing an Intent to startActivity().</p> Signup and view all the answers

    In the Model-View-Controller (MVC) pattern, which role is responsible for encapsulating and processing application-specific data?

    <p>Model</p> Signup and view all the answers

    What type of object is used to specify the intention to have something done in Android?

    <p>Intent</p> Signup and view all the answers

    What is the key function of the Controller in the Model-View-Controller (MVC) pattern?

    <p>Updating the model based on user actions</p> Signup and view all the answers

    Which design pattern requires custom objects to play specific roles like Model, View, and Controller?

    <p><em>Model-View-Presenter (MVP)</em></p> Signup and view all the answers

    When utilizing the Model-View-Controller (MVC) pattern, what is the primary role of the View component?

    <pre><code>ext{Updating the screen for user interaction} </code></pre> Signup and view all the answers

    Which role in the Model-View-Controller (MVC) pattern acts as an intermediary between the user interface and application logic?

    <p><em>Presenter</em></p> Signup and view all the answers

    What is the main value of delegation in design patterns?

    <p>Customizing the behavior of multiple objects in one central object</p> Signup and view all the answers

    How is delegation implemented in Swift?

    <p>Using protocols and delegates</p> Signup and view all the answers

    In Android, what is the purpose of understanding the 'moving parts' of an application architecture?

    <p>To develop effectively by understanding natures and interactions of components</p> Signup and view all the answers

    How does MVP design pattern differ from MVC?

    <p>MVP does not have a controller component like MVC</p> Signup and view all the answers

    What is a common characteristic of both MVC and MVP design patterns?

    <p>Separation of concerns among model, view, and controller/presenter</p> Signup and view all the answers

    Which statement best describes the role of a delegate in delegation design pattern?

    <p>The delegate updates appearance or state based on messages from the delegating object.</p> Signup and view all the answers

    What is the main role of a Model in the MVC/MVP design pattern?

    <p>Describe the main logic of the application and serve as the data source</p> Signup and view all the answers

    In MVC/MVP, what is the primary function of a Presenter?

    <p>Act as the middle layer between the view and model</p> Signup and view all the answers

    Why is separating code in MVC/MVP beneficial according to the text?

    <p>Makes testing easier and helps in maintaining and extending the application over time</p> Signup and view all the answers

    Which design pattern is more dependent on the view component according to the text?

    <p>MVC</p> Signup and view all the answers

    What does the Model in MVC/MVP pattern primarily handle?

    <p>Describing the main logic of the application and serving as the data source</p> Signup and view all the answers

    In MVC/MVP, which component is responsible for direct interaction with users?

    <p>View</p> Signup and view all the answers

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