MIDTERM

Question 1

What is Android’s kernel derived from?

Answer 1

Linux Kernel

Question 2

What language are the native libraries written in?

Answer 2

C / C++

Question 3

Which versions of Android use Android Runtime (ART)?

Answer 3

5.0 and up

Question 4

What is the predecessor of Android Runtime?

Answer 4

Dalvik

Question 5

What is .dex?

Answer 5

Bytecode used by ART and Dalvik

Question 6

What is the “Mother” of all files in Android?

Answer 6

androidManifest.xml

Question 7

What does Res mean?

Answer 7

Resources folder

Question 8

What is the Logcat window?

Answer 8

Displays messages in real time as you run your app

Question 9

What kind of message is Log.e?

Answer 9

Error

Question 10

What kind of message is Log.w?

Answer 10

Warning

Question 11

What kind of message is Log.i?

Answer 11

Information

Question 12

What kind of message is Log.d?

Answer 12

Debug

Question 13

What kind of message is Log.v?

Answer 13

Verbose

Question 14

What does Android Profiler do?

Answer 14

Shows the status of the device. ex: Network, Memory, CPU

Question 15

What is the Android Debug Bridge?

Answer 15

A command-line tool to communicate with device

Question 16

What is an Activity?

Answer 16

A window that contains the UI of your app

Question 17

How many activities can an app have?

Answer 17

0+

Question 18

What is a fragment?

Answer 18

Miniature activities that can be grouped to make one activity

Question 19

What is an Intent?

Answer 19

The “glue” that enables different activities from different applications to work together

Question 20

Where does the activity manager store records of open windows?

Answer 20

Application stack

Question 21

What is an application?

Answer 21

One or more activities plus a Linux process to contain them

Question 22

Application != _______

Answer 22

Process

Question 23

What function is used to place the UI in an Activity?

Answer 23

setContentView(View)

Question 24

Where do you initialize an activity?

Answer 24

onCreate(Bundle)

Question 25

What are the 4 states of an Activity?

Answer 25

1. Active/Running 2. Visible 3. Stopped/Hidden 4. Destroyed

Question 26

What is the order of the 6 callback methods based on the Activity lifecycle?

Answer 26

1. onCreate() 2. onStart() 3. onResume() 4. onPause() 5. onStop() 6. onDestroy()

Question 27

On which callback method should state be saved?

Answer 27

onPause()

Question 28

What is a service?

Answer 28

A task that runs in the background without the users direct interaction

Question 29

What are the 2 ways to design an android app?

Answer 29

1. Procedural 2. Declarative

Question 30

What is a view?

Answer 30

Every interactive visual control object that a user sees on the screen

Question 31

What is the default layout?

Answer 31

ConstraintLayout

Question 32

What are the 5 layouts?

Answer 32

1. Constraint 2. Frame 3. Linear 4. Relative 5. Table

Question 33

Which layout arranges it's children so they all start at the top left of the screen?

Answer 33

FrameLayout

Question 34

Which layout arranges it's children in a single row or column?

Answer 34

LinearLayout

Question 35

What are the 3 ways to set up listeners?

Answer 35

1. Programmatically using onCreate() 2. using android:onClick in the layout.xml 3. In the activity using onClickListener()

Question 36

What function do you use to to find views programmatically?

Answer 36

findViewById()

Question 37

What are the 5 types of Data Persistance?

Answer 37

1. Bundles 2. SharedPreferences 3. FileStorage 4. Database 5. External Storage

Question 38

What are bundles?

Answer 38

Sharing data between activities

Question 39

What is it called to share data between application executions?

Answer 39

SharedPreferences

Question 40

What kind of data do SharedPreferences work on?

Answer 40

Primitive

Question 41

What 2 things are adapters responsible for?

Answer 41

1) bridge between AdapterView and underlying data 2) Makes the view for each item in the dataset

Question 42

RecyclerView requires an Adapter and what else?

Answer 42

ViewHolder

Question 43

What kind of intent is used for emails, sms, calls, etc?

Answer 43

Implicit intent

Question 44

What is needed for an app to use resources outside it's sandbox?

Answer 44

Permissions

Question 45

Where do you declare needed permissions?

Answer 45

App Manifest

Question 46

What 2 locations house notifications?

Answer 46

1) Notification area 2) Notification drawer

Question 47

What are notification channels?

Answer 47

Provide a unified system to help users manage notifications

Question 48

What steps are involved in issuing a notification?

Answer 48

1. Get instance of Notification manager 2. User notify() to issue notification 3. Call Build()

Question 49

What 3 classes are used for advertisements?

Answer 49

1. AdView 2. AdSize 3. AdRequest