Remote Config in Android Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get an instance of Firebase Remote Config.

Android Kotlin

val remoteConfig = FirebaseRemoteConfig.[1]()

Drag options to blanks, or click blank then click option'

Astart

Binitialize

Ccreate

DgetInstance

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'initialize()' instead of 'getInstance()' causes a compile error.

Trying to create a new Remote Config object directly.

The getInstance() method returns the singleton instance of Firebase Remote Config.

2fill in blank

medium

Complete the code to set default values from an XML resource file named 'remote_config_defaults'.

Android Kotlin

remoteConfig.[1](R.xml.remote_config_defaults)

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AsetDefaults

BsetDefaultsAsync

CapplyDefaults

DloadDefaults

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'setDefaultsAsync' which does not exist.

Using 'loadDefaults' which is not a Remote Config method.

The setDefaults() method sets default parameter values from an XML resource.

3fill in blank

hard

Fix the error in the code to fetch Remote Config values with a 1-hour cache expiration.

Android Kotlin

remoteConfig.fetch([1]).addOnCompleteListener { task ->
    if (task.isSuccessful) {
        remoteConfig.activate()
    }
}

Drag options to blanks, or click blank then click option'

A60

B3600

C3600000

D600

Attempts:

3 left

💡 Hint

Common Mistakes

Using milliseconds instead of seconds causes the cache to expire too late.

Using too small a number causes frequent fetches.

The fetch() method expects cache expiration in seconds. 3600 seconds equals 1 hour.

4fill in blank

hard

Fill both blanks to get a Remote Config string value for the key 'welcome_message'.

Android Kotlin

val welcomeMessage = remoteConfig.[1]("[2]")

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AgetString

BgetValue

Cwelcome_message

DwelcomeMessage

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'getValue' returns a Remote Config value object, not a string.

Using a variable name instead of the key string.

Use getString() to get the string value for the key "welcome_message".

5fill in blank

hard

Fill all three blanks to fetch, activate, and then print the Remote Config value for 'feature_enabled'.

Android Kotlin

remoteConfig.[1]().addOnCompleteListener { task ->
    if (task.isSuccessful) {
        remoteConfig.[2]()
        println(remoteConfig.[3]("feature_enabled"))
    }
}

Drag options to blanks, or click blank then click option'

Afetch

Bactivate

CgetString

DfetchAndActivate

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'fetchAndActivate' instead of separate fetch and activate calls.

Using 'getValue' instead of 'getString' to get the parameter value.

First, fetch() gets the latest values. Then activate() applies them. Finally, getString() retrieves the value for the key.