Deck 11: Discover Persistent Data

Question 1

With Android, yo u have th e option of storing persist e nt data only on the device's internal storage.

Answer 1

False

Question 2

All applications can read and write files placed on external storage.

Answer 2

True

Question 3

A fter the app is terminated, what happens to the data stored within the SQLite database?

A) It erases.
B) It pauses .
C) It is transfer red to another location.
D) I t persists.

Answer 3

D

Question 4

When you write data using SharedPreferences, with which SharedPreferences object can you make changes?

A) SharedPreferences Manager
B) SharedPreferences Editor
C) SharedPreferences Memory
D) SharedPreferences Status

Question 5

Before an app attempts to connect to a netwo rk connection, what action should be taken?

A) The app should scan the quality of the network.
B) The app should open a network's web browser.
C) The app should see if an Internet connection is available.
D) No action needs to be taken.

Question 6

A SharedPreferences object is used to store user data only as long as the application is open.

Question 7

Which Android tool can store data that can be used in different Activities of your application or by another application ?

A) KeyTool
B) ListPreferences
C) ListSave
D) SharedPreferences

Question 8

What does the abbreviation SQL stand for?

A) Simple Quorum Language
B) Simpl e Query List
C) Structured Query Language
D) Structured Quorum List

Question 9

SharedPreferences can be used to save only int and string primitive data.

Question 10

What is one of the most effective ways to save simple application data to an Android device?

A) internal storgage
B) SharedPreferences object
C) external storage
D) SQLite database

Question 11

SharedPreferences are best when your app needs to save small chunks of data.

Question 12

The persistent data structure is available in some form in every programming language. 

Question 13

Persistent data stores values permanently by placing the information in a file.

Question 14

The SharedPreferences class stores private data as single values.

Question 15

T he Shared Preferences class provides one of the easiest ways to sav e and load data. Which specific data type does this refer to ?

A) encrypted data
B) persistent data
C) application data
D) primitive data

Question 16

Android applications cannot save data for later retrieval if the application is closed .

Question 17

All applications on a device can access any files created by an app when they are saved with the internal storage method.

Question 18

In a key-value pair, what is the key that uniquely identifies the preference ?

A) int
B) string
C) float
D) Boolean

Question 19

If you have a large amount of data to store as persistent data, which of the following storag e methods would be most efficient?

A) database
B) the device's internal storage
C) SD card
D) network connection

Question 20

How does the Shared preferences option of storing persistent data store private data?

A) private database
B) shared external storage
C) public cloud
D) key-value pairs

Question 21

If a string value is undefined in a key's value, what is it set to ?

A) *
B) the number 0
C) null
D) " "

Question 22

Which of the following correctly completes the statement b elow to instantiate a Shared Preferences object?
SharedPreferences sharedPref =

A) PreferenceManager.getDefaultSharedPreferences(this);
B) SharedPreferences.getDefault PreferenceManager (this);
C) PreferenceManager. SharedPreferences .getDefault(this);
D) SharedPreferences . PreferenceManager .getDefault(this);

Question 23

Which type of file does t he SharedPreferences object save data to?

A) SRC
B) RES
C) XML
D) DAT

Question 24

The _____________________ stores structured data in a private database.

Question 25

Data stored in ____________________ is lost when the app (or the device) stops running.

Question 26

Which statement dynamically assigns an image named car in the drawable folder to an ImageView control?

A) car.setImageResource(R.drawable.image);
B) image.setImageResource(car.R.drawable);
C) image.setImageResource(R.drawable.car);
D) SetImageResource .image( R. drawable.car);

Question 27

What is t he maximum number of shared preferences you can create ?

A) less than 10
B) It's based on the number of apps.
C) unlimited
D) 25 or less

Question 28

________________________ stores data, which can be available to other apps on shared external storage.

Question 29

In an Android project, an ImageView control can display an image by assigning what in the XML layout file ?

A) source path
B) workspace
C) target grid
D) hashtag

Question 30

If a numeric value is undefined in a key's value, what is it set to?

A) undefined
B) null
C) 0
D) -1

Question 31

The following permissions are necessary in the Android Manifest file to use which type of storage?

A) internal
B) external
C) indexed
D) volatile

Question 32

_____________________ stores values permanently by placing the information in a file.

Question 33

What's the first step when writing persisten t data using a SharedPreferences file?

A) Save the values to the preferences file
B) Assign values into SharedPreferences objects
C) Create a SharedPreferences.Editor object
D) Obtain an instance of the SharedPrefe rences file

Question 34

The persistent ____________________ structu re is available in some form in every programming language.

Question 35

Which method is used to store integer data in a SharedPreferences object ?

A) place Int ()
B) saveInteger()
C) putInt()
D) storeInteger()

Question 36

If data is lost when an app or the device stops running w here was the data st ored?

A) a cloud service
B) RAM
C) the device's driver
D) a memory card

Question 37

For Shared Preferences methods, what does the metho d return to  the application if the preference is undefi ned?

A) error code
B) "undefined" string
C) -1
D) default value

Question 38

Which method is used to retrieve a Boolean value from a SharedPreferences object?

A) getBool()
B) getBoolean()
C) readBoolean()
D) readBool()

Question 39

Which d ata type is NOT supported by the SharedPreference s class?

A) long
B) char
C) float
D) string

Question 40

Which type of storage is used if data is saved to an SD card?

A) Internal
B) Shared preferences
C) External
D) Network connection

Question 41

To write key-value pair assignments to an XML data file using a SharedPreferences editor object named edit, type ____________________.

Question 42

A(n) _______________ stores persistent data on a web server.

Question 43

The code to create a n instance of a SharedPreferences editor object named edit is ______________________________.

Question 44

The ______________________ method retrieves string values.

Question 45

The code to store the string "Hello" into a key named " gree ting" using a SharedPreferences editor object named edit is ____________________________.

Question 46

The code to assign a key-value pair for a floating point value with keyname interest and variable name fl t Inter est using a SharedPreferences editor object named edit is ___________________________________.

Question 47

An undefined string value is set to a(n) ____________ value, which is represented by empty quotes. 

Question 48

Loading data saved in a SharedPreferences XML file begins by _______________ the SharedPreferences object.

Question 49

The name-value pair in a SharedPreferences object is saved to a(n)  ____________________ file that can be retrieved later in the app or after the app closes.

Question 50

The ______________________ method retrieves long values.