iOS Development iOS Data Persistence

Question 1

Which iOS framework provides a key-value store for small amounts of persistent data?

Accepted Answer

UserDefaults

Answer

Core Data

Answer

Keychain

Answer

CloudKit

Question 2

Where should sensitive data like passwords be stored on iOS?

Accepted Answer

Keychain

Answer

UserDefaults

Answer

Core Data

Answer

NSCache

Question 3

What is Core Data's primary role in an iOS app?

Accepted Answer

Object graph management and persistence to SQLite or other stores

Answer

Syncing data in real time across devices

Answer

Encrypting data stored on disk

Answer

Caching network responses

Question 4

Which class is the central object in a Core Data stack?

Accepted Answer

NSPersistentContainer

Answer

NSManagedObjectContext

Answer

NSFetchRequest

Answer

NSPersistentStore

Question 5

What is the purpose of NSManagedObjectContext in Core Data?

Accepted Answer

Acts as a scratchpad for creating, fetching, and saving managed objects

Answer

Defines the data schema for the persistent store

Answer

Handles migration between model versions

Answer

Encrypts data before writing to disk

Question 6

Which iOS API is used to store small files in the app's sandboxed file system?

Accepted Answer

FileManager

Answer

URLSession

Answer

NSCache

Answer

CoreFoundation