Can Firestore queries be case-insensitive?

• Only in Pro Plan
• Yes, always
• No, not directly
• Yes, by default

What is the maximum depth of subcollections?

• Unlimited
• 50
• 20
• 10

Which query returns documents in ascending order?

• arrange()
• ascend()
• sortAsc()
• orderBy()

Firestore's free tier is called?

• Hobby Plan
• Spark Plan
• Free Plan
• Blaze Plan

Which method reads a document once?

• fetchDoc()
• readDoc()
• onSnapshot()
• getDoc()

What happens if a query needs an index that doesn't exist?

• Auto-creates index
• Runs without index
• Runs slower
• Fails with error

Can Firestore run aggregation queries directly?

• With extensions
• Only in paid plan
• No
• Yes

Firestore is best suited for?

• Cold storage
• Batch analytics
• Real-time apps
• Small datasets only

How do you prevent overwriting existing data with set()?

• mergeSet()
• safeSet()
• update()
• merge: true

Which function removes a field?

• dropField()
• FieldValue.delete()
• removeField()
• deleteField()

What is a Firestore hot spot?

• Popular document causing contention
• Fast query
• Hot cache
• Server issue

Which field type is best for geolocation queries?

• GeoPoint
• Coordinates
• LatLng
• GeoData

How to run queries on BigQuery from Firestore?

• Direct
• Via Cloud Functions
• Via Firebase Extensions
• Export then query

Firestore supports which transaction type?

• Read-only
• Read-write
• Both
• None

What is the max number of writes per second for a collection?

• 1,000,000
• 10,000
• 50,000
• Unlimited