Question 1

What file is responsible for glueing everthing together , explaining what the applicatin consists of, what its main building blocks are, ext…?
A)layout file
B)strings xml
C)r file
D)manifest file

Accepted Answer

The manifest file in Android applications (AndroidManifest.xml) is responsible for glueing everything together. It declares the application's components (activities, services, broadcast receivers, and content providers), permissions, and other application-level configurations.

Question 2

The XML file that contains all the text that your application uses.
A)stack.xml
B)text.xml
C)strings.xml
D)string.java

Accepted Answer

The correct answer is C) strings.xml. In Android development, strings.xml is the XML file that contains all the text strings used in the application, allowing for easy localization and management of text resources.

Question 3

Which of the following is the most "resource hungry" part of dealing with Activities on Android
A)closing an app
B)suspending an app
C)opening a new app
D)restoring the most recent app

Accepted Answer

Opening a new app is typically the most resource-intensive process among the options given, as it involves loading the app into memory, initializing it, and starting its main activity, which can require significant CPU and memory resources.

Question 4

What runs in the background and doesn't have any UI components?
A)intents
B)content providers
C)services
D)applications

Accepted Answer

Services are components that run in the background to perform long-running operations or to perform work for remote processes without a user interface.

Question 5

What is an Activity?
A)a single screen the user sees on the device at one time
B)a message sent among the major building blocks
C)a component that runs in the background without any interface.
D)context referring to the application environment.

Accepted Answer

An Activity in Android development refers to a single screen with a user interface. It represents one screen within an app, where users can interact with the device to perform a specific task.

Question 6

When an activity doesn't exist in memory it is in.
A)starting state
B)running state
C)loading state
D)inexistent state.

Accepted Answer

The starting state is when an activity is being created and initialized but not yet in memory.

Question 7

Which of the following is NOT a state in the lifecycle of a service?
A)starting
B)running
C)destroyed
D)paused

Accepted Answer

"Paused" is not a standard state in the lifecycle of a service. The typical states are starting, running, and destroyed.

Question 8

There is no guarantee that an activity will be stopped prior to being destroyed.

Accepted Answer

An activity in Android can be destroyed by the system without being stopped if the system needs to recover memory. This means there's no guarantee that the activity will go through the stop phase before being destroyed.

Question 9

In an explicit intent, the sender specifies the type of receiver.

Accepted Answer

In an explicit intent, the sender specifies the exact component (such as an activity or service) to handle the intent, not the type of receiver.

Question 10

an implicit intent is the sender specifies the type of receiver?

Accepted Answer

An implicit intent specifies the type of receiver, not the specific receiver.

Question 11

When the activity is not in focus, but still visible on the screen it is in?
A)running state
B)paused state
C)stopped state
D)destroyed state

Accepted Answer

When an activity is not in focus but still visible on the screen, it is in the paused state. This occurs when another activity partially covers it, such as a dialog.

Question 12

An activity in a stopped state is doing nothing.

Accepted Answer

An activity in a stopped state is still retaining all state and member information and is still attached to the window manager, but it's not visible to the user.

Question 13

Application contexts are independent of the activity life cycle.

Accepted Answer

Application contexts are tied to the application's lifecycle, not the activity lifecycle, allowing them to persist beyond the activity's existence.

Question 14

Services have any user interface components

Accepted Answer

Services in computing, especially in the context of Android or similar operating systems, typically run in the background and do not have a user interface component. They are designed to perform long-running operations or to perform work for remote processes without providing a UI.

Question 15

Broadcast receivers are Android's implementation of a system-wide publish/subscribe mechanism, or more precisely, what design pattern?
A)observer
B)facade
C)mediator
D)command

Accepted Answer

Broadcast receivers in Android implement the observer design pattern, where they listen for and react to broadcast messages from other parts of the system or applications.

Question 16

There can be only one running activity at a given time.

Accepted Answer

In Android, at any given time, there can only be one activity in the running state. Other activities may be paused, stopped, or destroyed, but only one is actively running and interacting with the user.

Question 17

YAMBA stands for Yet Another Mobile Banking App.

Accepted Answer

YAMBA typically stands for "Yet Another Micro Blogging App," a common example used in Android programming tutorials, not mobile banking.

Question 18

Lists and adapters are more organizational aids than user interface elements in Android.

Accepted Answer

Lists and adapters in Android are primarily used to manage and organize data for display in UI components like ListView or RecyclerView, rather than being UI elements themselves.

Question 19

What built-in database is Android shipped with?
A)sqlite
B)apache
C)mysql
D)oracle

Accepted Answer

Android is shipped with SQLite, a lightweight relational database designed for use on mobile devices.

Question 20

Creating a UI (User Interface) in Android requires careful use of…
A)java and sql
B)xml and java
C)xml and c++
D)dreamweaver

Accepted Answer

Creating a UI in Android typically involves using XML for layout design and Java (or Kotlin) for programming the logic and functionality behind the user interface. XML is used to define the structure and layout of the interface, while Java is used to define the behavior.

Quiz 3: Android Development: Files, Activities, Services, and Intents

What file is responsible for glueing everthing together , explaining what the applicatin consists of, what its main building blocks are, ext…?

The XML file that contains all the text that your application uses.

Which of the following is the most "resource hungry" part of dealing with Activities on Android

What runs in the background and doesn't have any UI components?

What is an Activity?

When an activity doesn't exist in memory it is in.

Which of the following is NOT a state in the lifecycle of a service?

There is no guarantee that an activity will be stopped prior to being destroyed.

In an explicit intent, the sender specifies the type of receiver.

an implicit intent is the sender specifies the type of receiver?

When the activity is not in focus, but still visible on the screen it is in?

An activity in a stopped state is doing nothing.

Application contexts are independent of the activity life cycle.

Services have any user interface components

Broadcast receivers are Android's implementation of a system-wide publish/subscribe mechanism, or more precisely, what design pattern?

There can be only one running activity at a given time.

YAMBA stands for Yet Another Mobile Banking App.

Lists and adapters are more organizational aids than user interface elements in Android.

What built-in database is Android shipped with?

Creating a UI (User Interface) in Android requires careful use of…