Firestore interview questions

1. A.the basic unit of storage in Firestore, a set of key-value fields living inside a collection
2. B.a startAt or startAfter pagination marker that resumes results from a specific document position
3. C.a grouping of up to 500 set, update, or delete operations committed together as a single atomic unit
4. D.an onSnapshot subscription that pushes updates to clients whenever matching data changes, instead of polling

Answer + AI explanation with Pro

1. A.WriteBatch
2. B.Collection
3. C.Document
4. D.Subcollection

Answer + AI explanation with Pro

1. A.Document — a grouping of up to 500 set, update, or delete operations committed together as a single atomic unit
2. B.Document — a container that holds documents and cannot itself store raw fields, only nested records
3. C.Document — a collection nested under a single document, used to model hierarchical one-to-many relationships
4. D.Document — the basic unit of storage in Firestore, a set of key-value fields living inside a collection

Answer + AI explanation with Pro

1. A.the basic unit of storage in Firestore, a set of key-value fields living inside a collection
2. B.a collection nested under a single document, used to model hierarchical one-to-many relationships
3. C.a container that holds documents and cannot itself store raw fields, only nested records
4. D.a startAt or startAfter pagination marker that resumes results from a specific document position

Answer + AI explanation with Pro

1. A.WriteBatch
2. B.Composite index
3. C.Collection
4. D.Real-time listener

Answer + AI explanation with Pro

1. A.Collection — a multi-field index that must be created so queries filtering or ordering on more than one field can run
2. B.Collection — a container that holds documents and cannot itself store raw fields, only nested records
3. C.Collection — an onSnapshot subscription that pushes updates to clients whenever matching data changes, instead of polling
4. D.Collection — a grouping of up to 500 set, update, or delete operations committed together as a single atomic unit

Answer + AI explanation with Pro

1. A.the basic unit of storage in Firestore, a set of key-value fields living inside a collection
2. B.a multi-field index that must be created so queries filtering or ordering on more than one field can run
3. C.a collection nested under a single document, used to model hierarchical one-to-many relationships
4. D.a container that holds documents and cannot itself store raw fields, only nested records

Answer + AI explanation with Pro

1. A.Subcollection
2. B.Composite index
3. C.Query cursor
4. D.Real-time listener

Answer + AI explanation with Pro

1. A.Subcollection — a container that holds documents and cannot itself store raw fields, only nested records
2. B.Subcollection — a startAt or startAfter pagination marker that resumes results from a specific document position
3. C.Subcollection — a collection nested under a single document, used to model hierarchical one-to-many relationships
4. D.Subcollection — a grouping of up to 500 set, update, or delete operations committed together as a single atomic unit

Answer + AI explanation with Pro

1. A.a startAt or startAfter pagination marker that resumes results from a specific document position
2. B.the basic unit of storage in Firestore, a set of key-value fields living inside a collection
3. C.a container that holds documents and cannot itself store raw fields, only nested records
4. D.an onSnapshot subscription that pushes updates to clients whenever matching data changes, instead of polling

Answer + AI explanation with Pro

1. A.Subcollection
2. B.Real-time listener
3. C.Document
4. D.Query cursor

Answer + AI explanation with Pro

1. A.Real-time listener — a grouping of up to 500 set, update, or delete operations committed together as a single atomic unit
2. B.Real-time listener — an onSnapshot subscription that pushes updates to clients whenever matching data changes, instead of polling
3. C.Real-time listener — a multi-field index that must be created so queries filtering or ordering on more than one field can run
4. D.Real-time listener — a startAt or startAfter pagination marker that resumes results from a specific document position

Answer + AI explanation with Pro

1. A.a startAt or startAfter pagination marker that resumes results from a specific document position
2. B.the basic unit of storage in Firestore, a set of key-value fields living inside a collection
3. C.a grouping of up to 500 set, update, or delete operations committed together as a single atomic unit
4. D.a multi-field index that must be created so queries filtering or ordering on more than one field can run

Answer + AI explanation with Pro

1. A.Subcollection
2. B.Composite index
3. C.Document
4. D.Query cursor

Answer + AI explanation with Pro

1. A.Composite index — a container that holds documents and cannot itself store raw fields, only nested records
2. B.Composite index — a multi-field index that must be created so queries filtering or ordering on more than one field can run
3. C.Composite index — an onSnapshot subscription that pushes updates to clients whenever matching data changes, instead of polling
4. D.Composite index — a collection nested under a single document, used to model hierarchical one-to-many relationships

Answer + AI explanation with Pro

1. A.the basic unit of storage in Firestore, a set of key-value fields living inside a collection
2. B.a startAt or startAfter pagination marker that resumes results from a specific document position
3. C.a grouping of up to 500 set, update, or delete operations committed together as a single atomic unit
4. D.a container that holds documents and cannot itself store raw fields, only nested records

Answer + AI explanation with Pro

1. A.Document
2. B.Query cursor
3. C.WriteBatch
4. D.Real-time listener

Answer + AI explanation with Pro

1. A.Query cursor — an onSnapshot subscription that pushes updates to clients whenever matching data changes, instead of polling
2. B.Query cursor — a collection nested under a single document, used to model hierarchical one-to-many relationships
3. C.Query cursor — the basic unit of storage in Firestore, a set of key-value fields living inside a collection
4. D.Query cursor — a startAt or startAfter pagination marker that resumes results from a specific document position

Answer + AI explanation with Pro

1. A.a multi-field index that must be created so queries filtering or ordering on more than one field can run
2. B.a container that holds documents and cannot itself store raw fields, only nested records
3. C.a startAt or startAfter pagination marker that resumes results from a specific document position
4. D.a grouping of up to 500 set, update, or delete operations committed together as a single atomic unit

Answer + AI explanation with Pro

1. A.Subcollection
2. B.Document
3. C.Query cursor
4. D.WriteBatch

Answer + AI explanation with Pro

1. A.WriteBatch — a collection nested under a single document, used to model hierarchical one-to-many relationships
2. B.WriteBatch — a startAt or startAfter pagination marker that resumes results from a specific document position
3. C.WriteBatch — the basic unit of storage in Firestore, a set of key-value fields living inside a collection
4. D.WriteBatch — a grouping of up to 500 set, update, or delete operations committed together as a single atomic unit

Answer + AI explanation with Pro