Firebase Analytics forms the backbone for app event tracking. This quiz covers 2025 SDK limits, event best practices, and user property rules so you can implement with confidence.
Firebase Analytics uses which identifier by default to represent an app installation?
User ID
Instance Token
App Instance ID (app_instance_id)
Device ID
Each fresh install generates a 32‑character app_instance_id; it persists until app data is cleared or TTL expires.
As of 2025, the maximum number of **distinct event names** per Firebase project is ______.
1000
100
Unlimited
500
Google retained the 500‑event cap to control backend cardinality and billing.
`setUserProperty` accepts strings up to ______ characters long.
128
24
100
36
Firebase truncates longer values; official SDK docs (Feb 2025) confirm 24‑char limit.
Which standard event replaced `app_update` in the April 2025 SDK?
app_store_update
app_upgrade
os_update
version_update
Deprecation notice migrated to new event name to align with GA4 spec.
Debugging app events locally requires launching the app with argument ______ on Android 2025 SDK.
-debug
-firebaseDebug
-ga_debug
-FIREBASE_ANALYTICS_DEBUG_MODE
Setting the flag routes events to DebugView immediately.
Default retention period for user‑level data in Firebase is ______ if BigQuery not linked.
26 months
2 months
14 months
24 hours
Firebase mirrors GA4 default for free properties—two‑month user data.
To log currency in in_app_purchase, you pass ISO 4217 code via parameter ______.
monetary_unit
value_type
currency
iso_code
currency paired with value handles multi‑currency revenue.
In 2025, Firebase dropped support for analytics collection on which minimum Android API level?
19 (KitKat)
23 (Marshmallow)
16 (Jelly Bean)
21 (Lollipop)
SDK 21.4.0 release notes list API 19 as deprecated; events no longer send.
User properties set in Firebase automatically surface in GA4 UI after up to ______ hours.
12
24
72
1
Backend sync propagates new properties during daily definition job.
`analytics_storage` consent must be granted before Firebase writes ______ cookie on web.
_gfp_64b
__utmz
_ga
_gid
Consent Mode conditions the primary GA client ID storage.
Starter
Revisit the key firebase analytics 101 docs and SDK guides, then attempt again.
Solid
Good command of firebase analytics 101—review edge cases to level up.
Expert!
Stellar! Your firebase analytics 101 knowledge is cutting‑edge.
