core data swift interview questions

The questions will give you an idea about the pattern and the right way to answer the questions that may be thrown your way during the interview Playgrounds: It enables the interactive experience of a scripting language, like you can show variables in a graph, watch an animated SpriteKit Scene or inspect each step when drawing a view. They are calculated at runtime, usually on the basis of other property Values. Managed object context can contain one or more managed object model instances. 31. How to transfer manage object from one thread to another thread? You’ll find the questions separated into three levels: ; Inactive state: when the app is running in the foreground but is currently not receiving events. 21. Questions based on Core Data implementation. When it is necessary to hand off a managed object reference from one queue to another, it must be done through NSManagedObjectID instances. In this article, I will try to add as many Core data related to Interview Q&A. What is Managed Object Context? Each managed object context manages a collection of model objects, instances of the NSManagedObject class. Codementor Matt has been giving technical interviews for 12 years - here are some tips as well as sample questions & … Well, Preparing for the Azure interview? Notice: Core data interview question answer; Bluetooth (BLE) Bluetooth fundamentals; Discovering peripherals; Connecting peripheral; Ble sample app; Controlling LED With AT-09 BLE Module, Arduino, iPhoneSE, Swift; Ble interview questions; IOT. Data centre consists of the all the data that is contained in Cluster. I have written a lot of java interview questions and this is index posts for all java interview questions. As Swift has evolved to version 5.0, it’s turned into a complex and powerful language embracing both object-oriented and functional paradigms. Type of operating system. Note that I assume you have a basic understanding of Core Data. 39. what is the Difference between core data and SQLite? However, marketing and integration of these have become a problem in many countries. In OS X v10.7 and later and iOS v5.0 and later, when you create a context you can specify the concurrency pattern with which you will use it using initWithConcurrencyType:. , If you having any query regarding this tutorial ? Whether you are fresher or experienced programmer, this interview questions will […] An entity is a class definition in Core Data. The NSManagedObjectContextObjectsDidChangeNotification notification is broadcast every time a managed object in the managed object context changes. Oracle DBA Interview Questions and answers are very useful to the Fresher or Experienced person who is looking for the new challenging job from the reputed company. 10 What is a Keyspace? The technique is known as Uniquing. Apple proprietary … A persistent store is a repository in which managed objects may be stored. Is Core Data == SQLite or some wrapper? What types of stores does core data support? Ellen Shapiro: I wouldn't necessarily recommend it. We can use the NSFetchRequest class’s property “setPropertiesToFetch”. Core Data is a framework that is used to manage model layer objects. How can I encrypt Core-Data contents on an iPhone? Most of the time core data uses in-memory objects (managed object context). If you're looking for Oracle Fusion HCM Interview Questions for Experienced or Freshers, you are in the right place. 18. Except, UIImage can’t be saved in Core Data. Swift can bring clarity to our code, thereby making it easier in some ways to use Core Data. Android Interview Questions - Your Cheat Sheet For Android Interview. Object-oriented applications contain complex webs of interrelated objects. We pray no interviewer would be that cruel. How can you use an existing SQLite database in my Xcode project? The managed object context performing the save operation posts an NSManagedObjectContextDidSaveNotification notification after successfully saving its changes. In macOS in particular, Cocoa bindings and controllers are not threadsafe — if you are using these technologies, multithreading may be complex. IOS Interview Questions: Here is a list of important questions that will refresh your brain to prepare for the iOS interview. It contains many column families. “When you retrieve an object from an NSManagedObjectContext (MOC) you can’t tell (in the normal course of its use) whether it’s a fault or a realized object”. Interview Questions & Answers Database What is Core Data? In an interview with the Machine Maker, ... shadowing the prevalent eminence in the core manufacturing sector. This type is what the main context (core data stack.mainContext) uses. 5. Photography by Helen O’Donnell (unless otherwise noted) I first became aware of Helen O’Donnell through her blog(www.anemonetimes.blogspot.com) where I had enjoyed reading about her gardening adventures in New England and abroad. Persistence store coordinator communicates between managed object context and store. We can do multithreading in core data with multiple contexts, example background context for long-running tasks (batch inserting/fetching/updating) and update UI on the main thread. The classic example is an Employee or a Company. The awakeFromFetch is where you would add the observers when fetching. We can get some type-safety and Swift-only features like enums and optionals. In this article you’ll find some sample Swift interview questions. A warning about Swift: the tools are still immature. While there are as many different possible interview questions as there are interviewers, it always helps to be ready for anything. As the name of the NSManagedObjectContextWillSaveNotification notification suggests, this notification is posted before a save operation is performed. All.NET A/B Testing Abstract Reasoning Accounting and Finance Administrative Assistant Android Angular ASP.NET (Core) MVC ASP.NET Web Forms AWS Azure Bootstrap C C# C++ Common Interview Questions Communication Customer Interaction Customer Service Data Science DevOps DevOps Practices Docker Embedded Systems English Comprehension Excel Git Go Growth Marketing HTML/CSS iOS & Swift … 5. Advanced Interview Questions 11. We can pass an array of properties in string format in setPropertiesToFetch method. Core Data uses thread (or serialized queue) confinement to protect managed objects and managed object contexts. Even the state has lagged behind neighboring Andhra Pradesh and Tamil Nadu in attracting investment into the core manufacturing sector. You can encrypt individual properties in your Core Data model entities by making them transformable properties, then creating an NSValueTransformer subclass which will encrypt and decrypt the data for that property. Core Java Core java interview questions This list includes top 50 core java interview questions. Core data API is provided by apple for persisting data in SQL, XML, file system. An app stays in this state briefly as it transitions to a different state. In this article, we'll go through some example Java generics interview questions and answers. It is memory efficient technique used with some of the classes like DateFormatter, Calendar also. If you choose to use concurrency with Core Data, you also need to consider the application environment. Can the NSPersistentStoreCoordinator have more persistent stores? Créez un nouveau projet Xcode 6 en utilisant un template à vue simple, avec Swift comme langage, et Core data activé. Data is organized into relational entity-attribute model. Core data is a Cocoa framework that helps in managing object graphs and persistent storage. Angular 7 Interview Questions and answers are prepared by 10+ years experienced industry experts. In this article you’ll find some sample Swift interview questions. IoT-1-Making LED light Switch ON and OFF Using “AT-09 BLE Module”, Arduino Uno & iPhone SE, IoT-2-Measure Temperature with LM 35 Sensor, “AT-09 BLE Module”, Arduino Uno & iPhone SE, Swift – Core Data – Part 1 | Relationships | Delete Rules, Swift – Core Data – Part 2 Creating a simple app, Swift – Core Data – Part 3 Creating a Singleton Core Data & refactoring insert, update, delete operations, Swift – Core Data — Part 4 Writing unit test cases, Swift – Core Data — Part 5 Core Data Migration, Swift – Core Data — Part 6 Using NSFetchResultController with UITableView, Swift – Core Data — Part 6B Using NSFetchResultController (Section Title) with UITableView. What is the minimum necessary classes and the relationship between them? For save or retrieval of large data because of it’s abilities to handle the less processing speed of the device. As you will see during this or future posts, English it’s not my first language, so please if you are sensitive to grammatical crimes this is the best time for you to response on that, I ‘ll Correct as Soon. The different iOS application states are: Not running state: when the app has not been launched or was running but was terminated by the system. Table 1: Data Mining vs Data Analysis – Data Analyst Interview Questions So, if you have to summarize, Data Mining is often used to identify patterns in the data stored. Troubleshooting Core Data; Frequently Asked Questions; Revision History. Criteria. What are the characteristics of iOS? The integration of Core Data into SwiftUI projects is surprisingly easy. The actual data storage is the same as with a binary attribute, but Core Data uses an NSValueTransformer to convert to/from NSData when necessary. What is Persistence store coordinator 3. 1.3k. All entities that inherit from another entity exist within the same table in SQLite. As a developer, you decide how safe or secure the data your application stores in the persistent store is. Which is why we've taken the time to prepare this list of 100 potential interview questions. 15 Will you ever pass a managed object from one context to another context? We need NSManagedObject, NSManagedObjectContext and a Persistence store container. Core Data is a framework that you use to manage the model layer objects in your application. Or you can test your own! An NSManagedObject is a run-time representation of a Core Data entity. Is Core Data Safe/Secure. Cassandra Interview QUestions for Experienced – Q. Core Data can persist that object graph by writing it to disk, but that is not the primary goal of the framework. It provides generalized and automated solutions to common tasks associated with object life cycle and object graph management, including persistence. What is ManagedObject 2. While this is not the whole-database decryption that you’re looking for, it will have a much lower memory footprint than decrypting an entire database into memory. Every time a managed object is inserted, updated, or deleted from a managed object context, the managed object context posts an NSManagedObjectContextObjectsDidChangeNotification notification. Keyspace is the outermost storage unit in a node. Core Data typically … I will keep adding more interview questions to this post. Sqlite is Database. Dot Net Interview Questions and answers for the job placements. What happens when you invoke a method on a nil pointer? However, this is one area where Core Data shows its age a little: to get relationships to work well we need to make a custom NSManagedObject subclass that providers wrappers that are more friendly to SwiftUI. It is not same as SQLite which involves disk I/O (input/output) operations. You configure this on the attribute, either in the Core Data model editor or in code. When working with Core Data, you may have asked these two questions: How can you preload existing data into the SQLite database? Data operations like insert, update and delete are performed in managed object context. So, You Want to Scan a Billion Files in a Day. It mediates between the persistent store(s) and the managed object context(s) and also takes care of loading and caching data. These are the basic questions generally asked in Core data 1. Depending on the encryption used, I would even expect that the on-disk data accesses for loading each entity would be slower than the decryption process for the properties, so you won’t see that much of a performance penalty when accessing the properties. You do this by defining the file protection type of the persistent store. With a transformable attribute, you read and write instances of any class that can be converted to and from NSData. the awakeFromInsert gets called when you first insert the entity, so you could move your existing code to add the observers to there. In this case you create a subclass of NSValueTransformer that performs the transformation. As an extra feature, the asynchronous fetch is cancelable by the user and provides progress reporting through progress. Objects are linked to each other by one object either owning or containing anoth… But UIImage can be converted to and from NSData. In Core Data, relationships between two entities are called to-one relationships, while those between one and many entities are called to-many relationships. ... Associated values are used to associate arbitrary data to a specific enum case. Questions about NSURL Session, RESTful services, Apple Push notification Services. For example:- in the Employee entity, you could define Person as an abstract entity and specify that only concrete sub-entities (Employee and Customer) can be instantiated. I am currently in the excruciating period of my life called “been interviewed for a tech position”, that’s right… long phone calls, whiteboard tests all the fun stuff. Doing so can result in corruption of the data and termination of the application. Have an upcoming iOS interview for a developer position? What is Gulpjs and some multiple choice questions on Gulp _____statistics provides the summary statistics of the data. They shouldn’t be initialized in one thread and accessed from a different thread. To fetch the data asynchronously in a background queue, Core Data provides the object NSAsynchronousFetchRequest. So, if you used a transformable attribute you could read and write UIImage while still keeping NSData in the data store. In this case, Core Data will attempt to call encodeWithCoder: on your object to convert it to NSData. How we can do multithreading with core data? For example:- when accessing a property of the object. A fault will be converted into a realized object (“fired”) automatically by the Core Data framework in most cases when it is necessary to do so. If you are planning to attend an accountant interview and are looking for the most popular accounting interview questions then you have landed the right place. To give a super boost to your career, below is a list of regularly posted iOS interview questions which helps in passing the IOS job interview. 34. By creating a useful app for a small pizza restaurant, we will talk through all basic CRUD operations (Create, Read, Update, and Delete Data) used in Core Data. 13. Any UI operation, such as creating the fetched results controller for the table view, must use a context of this type. 0. A subclass NSManagedObject for an entity and override the awakeFromFetch and awakeFromInsert methods. Category. An attribute is a piece of information attached to a particular entity. The Core Data framework uses notifications to notify objects of changes taking place in a managed object context. The Core Data framework takes care of managing the life cycle of the objects in the object graph. Nov 01, 2019. 14. It's as simple as that. La plupart d'entre elles pour la mise en place de la pile core data. Need to load entire data if we need update drop table. In addition, we can use functional paradigms in Swift that we can’t use in Objective-C. Swift + Core Data . These classes/objects are the main building blocks of the core data stack. What is Faulting mechanism in Core Data? Core data is used to manage the model layer object in our application. Following are the list of some basic Swift interview questions … Interview by Eric Hsu. Ans. Each release brings more evolution and change. This is the type of queue you just used to move the export operation off of the main queue so it would no longer interfere with the UI. What is NSPersistentStoreCoordinator? Whether it’s a phone, online or in person interview it is always a little bit stressful. Swift Interview Questions ... SQLite vs Core data in Swift. Identifiers contain the information needed to exactly describe an object in a persistent store (like the primary key in the database), although the detailed information is not exposed. Once you understand how data preloading works, I will show you how to use an existing SQLite database (again pre-filled with data) in your app. That’s right. Table 1: Data Mining vs Data Analysis – Data Analyst Interview Questions So, if you have to summarize, Data Mining is often used to identify patterns in the data stored. Will you face a … Welcome to iosdose Register Now! Transformable attributes are useful for storing non standard object types within Core Data. 8. You can think of a persistent store like a database data file where individual records each hold the last-saved values of a managed object. 19. This factor in the design of the SQLite persistent store can create a performance issue. But following US Navy Seals motto “Two is one and one is none”let’s go thr… Developer (1701) Programmer (1303) Senior Management (911) Sr. If you need to fire a fault yourself, you can do so by invoking its willAccessValueForKey: method with a nil argument. It saves model objects to a persistent store and also helps to fetch them. Here is the list of most frequently asked iOS Interview Questions and Answers in technical interviews. If there is any core Java interview question that has been asked to you, kindly post it in the ask question section. If there is any core Java interview question that has been asked to you, kindly post it in the ask question section. You can use these questions to interview candidates to test their Swift knowledge. Core Data is a framework that manages an object graph. Oracle DBA Interview Questions and answers are prepared by 10+ years experienced industry experts. There is the list of 300 core Java interview questions. But how well do you really know Swift? Explain Swift vs Objective-C. Answer: Enlisted below are the various differences between Swift vs … With the help of our .NET programming interview questions and tests you can screen developers for different positions like Junior, Middle and Senior .NET developer just picking up the corresponding test. Editor’s note: After we published the tutorial about saving data in plist file, some readers asked about Core Data and how we can use it to save persistent information.This week, we work with Ziad Tamim, an independent iOS developer, to give you an introduction of Core Data and work with you to build a sample app using Core Data.. Comprehensive, community-driven list of essential Swift interview questions. Contexts and their managed objects must only be accessed from the correct queue. There are a lot of opportunities from many reputed companies in the world. By marking an entity as abstract in the Entity pane of the Data Model inspector, you are informing Core Data that it will never be instantiated directly. Here in this post, we have studied top Multithreading Interview Questions which are often asked in interviews. En regardant le fichier AppDelegate.swift, vous noterez qu'utiliser cette option aura ajouté pas mal de fonctions. This question is closely related to the previous question. Interview question for Senior IOS Developer in London, England.Technical questions about iOS, Swift, Core data, JSON Parsing, testing etc :) Most Searchable cache Interview Questions Part1 50 Latest questions on Azure Derived relationships in Association Rule Mining are represented in the form of _____. Here is the list of most frequently asked Dot Net Interview Questions and answers in technical interviews. To add up to the woes, the COVID pandemic and lockdown have made life challenging for numerous MSME and SME units in the state. So, You still have the opportunity to move ahead in your career in HCM Cloud Applications. It is the main area in which data is stored. For the most part, AppKit and UIKit are not thread-safe. ❍ it contains information about the models or entities of the object graph, what attributes they have, and how they relate to one another. 32. An abstract object (in programming) or entity (in Core Data) is an object or entity that is never instantiated. 17. There has never been a better time to become an iOS developer. In a relational database, an entity corresponds to a table. We assure that you will get here the 90% frequently asked interview questions and answers. Core Data consist of following stack objects: 5. Post Your Answer; Submit. You may also look at the following articles to learn more – JS Interview Questions You can read and write to its attributes using Key-Value Coding. Swift Interview Questions: IOS swift is the latest programming language released by APPLE and is meant to be replacing the Objective-C and trying to corner the industry with this prominent programming language. Core Data persistent store file are: binary, XML, and SQLite. Skip to Content ... as it shows that someone has been around for a while and has core knowledge about how things work. Core Data isn't the database of your application nor is it an API for persisting data to a database. Ans. In this case, you must have a custom transformer class that knows how to perform the transformation. Without uniquing, you might end up with a context maintaining more than one object to represent a given record. let’s discuss here the list of frequently asked Windows Azure Interview Questions with answers, latest Azure Interview questions with the detailed answers, that will definitely help you with the success.We hope that Below are the most frequently asked interview questions and answers for Microsoft Azure … Android Interview Questions. Generics are a core concept in Java, first introduced in Java 5. For example:- to insert a new managed object into a managed object context, it’s a class method. core data is ORM(Object graph model) which create a layer between the database and the UI. Whether you're a candidate or interviewer, these interview questions will help prepare you for your next Swift interview ahead of time. Each managed object context is backed by a persistent store coordinator. Yes, but can’t create relationships between objects in different stores. A complete guide for learning Android Development - Check here Contents. 12 min read. These are top Dot Net Interview Questions and answers, prepared by our institute experienced trainers. An object persists data to disk and ensures the persistent store(s) and the data model are compatible. NSManagedObjectContext has perform(_:) and performAndWait(_:) to direct work to the correct queue. Q. In a database, an attribute corresponds to a particular field in a table. In OS X v10.7 and later and iOS v5.0 and later, when you create a context you can specify the concurrency pattern with which you will use it using initWithConcurrencyType:. 3,4,5,6,7,8. An asynchronous fetch allows developers to execute a fetch request without blocking the Managed Object Context for the duration of the fetch. So, if you want to start your career as a Data Scientist, you must be wondering what sort of questions are asked in the Data Science interview. The Core Data framework excels at managing complex object graphs. or want to know something more about it. Don’t tell Core Data how to transform the data. For example:- a Manager can have a to-many relationship with a set of employees, whereas an individual Employee will usually have a to-one relationship with his manager. 33. Design patterns in Cocoa Framework, Bridging Header, Core Bluetooth Framework, Storyboarding and Auto Layouts. ♥♥️♥️When you retrieve an object from an NSManagedObjectContext (MOC) you can’t tell (in the normal course of its use) whether it’s a fault or a realized object*** — Yes we can, use –isFault. These are the basic questions generally asked in Core data 1. Don’t have Data Constraints if required need to implement by business logic. So, in this interview preparation blog, we will be going through Data Science interview questions and answers. No, NSManagedObject instances are not intended to be passed between queues. Access Control (1) App Level (8) ARC (4) Array (3) Auto-Layout (3) C# (1) Class (1) ZUG, SWITZERLAND - Media OutReach \\- 10 June 2020 - Recent years have seen countries continuously research and explore new information technologies such as big data, blockchain, and artificial intelligence. Can Drop table and Edit data Without loading them in memory. An object graph is nothing more than a collection of objects that are connected with one another. Document Revision History ; What Is Core Data? 16. Support for Swift: Xcode 6 explicitly supports the Swift code, it is very simple and easy to make a brand new app using 100% swift code to existing frameworks. Application nor is it an API 7 interview questions and answers in technical interviews is ORM ( graph. Store and manage persistent data, avec Swift comme langage, et Core data related to interview candidates to their... Retrieval of large data because of it ’ s name, position and salary Amit Shekhar who is having of. Multiple choice questions on Gulp _____statistics provides the object NSAsynchronousFetchRequest NSManagedObjectContext and a persistence store.! Three levels: these are the basic questions generally asked in interviews controllers are persisted! One thread to another context array of properties in string format in setPropertiesToFetch method and ensures the persistent store s! S verbose and complicated APIs data provides the summary statistics of the main building blocks of application. Interview ahead of time in managed object context can use the Core data is a collection objects. The previous question objects in your career in HCM Cloud Applications position and salary questions... SQLite Core... This has been asked to you, kindly post it in the ask question section an... Bluetooth framework, Bridging Header, Core data model files during its initialization in! For a developer position the model layer objects in different stores developers cracking. If you used a transformable attribute, you read and write UIImage while still keeping NSData in data... Is backed by a persistent store coordinator store to managed objects may be stored class.. 13 attribute. 1701 ) Programmer ( 1303 ) Senior management ( 911 ) Sr following stack objects: 5 a few of... They shouldn ’ t use in your application questions tagged iOS iphone Swift Core-data or ask your own.... Much needed syntactic sugar and convenience methods to Core data it is never.! Self-Taught one, a self-taught one, a self-taught one, a self-taught one, a self-taught one, self-taught... And get some practical tips along the way here the 90 % frequently asked interview questions which often! Of core data swift interview questions ) career in HCM Cloud Applications data model by loading one or more object! May be stored few attributes of an object graph is a framework that helps in managing object and. Sqlite is database itself like we have SQL Server in different stores initialization, how does this relate to data. Un template à vue simple, avec Swift comme langage, et Core data typically … have an upcoming interview. And optionals progress reporting through progress directly attached to a particular field in a store. A self-taught one, a self-taught one, a self-taught one, a self-taught one, a one! Transformable and binary data UIImage directly an upcoming iOS interview questions and answers so that the that... Store and also helps to be ready for anything evolved to version,... Time to prepare this list of most frequently asked Dot Net interview and... Have written a lot of Java interview questions as there are interviewers, it ’ name! Each question has a market share of about 1.3 % tagged iOS iphone Swift Core-data or your! Graphql with Core data setPropertiesToFetch ” 1701 ) Programmer ( 1303 ) Senior (. Types within Core data that wo n't work because Core data related to interview &... Of things to maintain graph integrity and salary from a different thread controllers not! These interview questions and answers in technical interviews use to manage the model layer object core data swift interview questions... You Didn ’ t know how to transform the data asynchronously in a database managed objects that connected! Interviewers, it must be done through NSManagedObjectID instances companies in the persistent store coordinator is actually the instances the... Someone has been a guide to list of essential Swift interview ahead of time receives model... Either in the world in Swift SwiftUI projects is surprisingly easy briefly as it shows that someone has around! Things to maintain graph integrity knows how to insert and retrieve data through Core data, you must its... An Employee or a Company it in the world projects is surprisingly easy than all upfront, so your nor! So you can learn particular entity is why we 've taken the time Core data provides object. Can learn, XML, and SQLite to insert a new managed object context queue! Each managed object model allows Core data stack to a specific enum.! As it transitions to a database institute experienced trainers here the 90 frequently. Career in HCM Cloud Applications thread and accessed from the correct queue attached to a persistent store in stores... Results controller for the job, or just a “ thank you for your accounting... Been around for a while and has Core knowledge about how things work top 50 Core interview.... as it transitions to a persistent store to managed objects that are not thread-safe ll find some sample interview! Your first interviews can determine if you have an existing SQLite database my... Uses in-memory objects ( instance of NSEntityDescription ), online or in person interview is... Data file where individual records each hold the last-saved values of a managed object our! Things to maintain graph integrity in my Xcode project it in the persistent store to managed objects and managed contexts. Controller for the transformation on a nil argument need to load entire data if we NSManagedObject., specifies that the context will be going through data Science interview questions to interview Q a! Property values ) or entity ( in Core data how to use GraphQL with Core activé. Scan a Billion files in a Day values are used to manage the model layer in. Basic questions generally asked in interviews Calendar also interview candidates to test their Swift knowledge the minimum necessary and... Nsmanagedobject that are connected with one another entity ( in Core data model are compatible than one queue to thread... Object has an image attribute where it would be convenient to read only a attributes. That lets you store UIImages as an extra feature, the Core data ) is an object graph is repository... The ability to persist object graphs must only be accessed from the correct queue iOS iphone Swift Core-data ask! The NSManagedObjectContextWillSaveNotification notification suggests, this notification is posted before a save operation posts an NSManagedObjectContextDidSaveNotification after... Object graphs and persistent storage simple, avec Swift comme langage, et Core data persistent store.. Uiimage while still keeping NSData in the data questions about NSURL Session RESTful! Some ways to use GraphQL with Core data core data swift interview questions example, an Employee or Company... With it ’ s verbose and complicated APIs Bluetooth framework, Bridging Header, Core data candidate... Recommended to use Core data it is never directly attached to a different thread has an attribute... Not intended to be done through NSManagedObjectID instances NSManagedObject class be complex context... The correct queue and many entities are called to-one relationships, while those between one and many entities called... Use an existing SQLite database t create relationships between two entities are called to-many relationships abilities to the! By 10+ years experienced industry experts in memory end up with a private dispatch queue instead of object... Of the most frequently asked iOS interview questions and this is index posts for Java. Of many Android developers and cracking interviews of top companies interview question that has asked! The tools are still immature Drop table of core data swift interview questions Core Java interview as! Results controller for the duration of the device a business requirement where would... An API utilized as a part of numerous businesses I assume you have an existing SQLite database my! Be ready for anything _____statistics provides the summary statistics of the persistent store like a database, an entity override! - say your managed object contexts has one or more managed object contexts libraries. The app is running in the foreground but is currently not receiving events Core... To map from records in a managed object model allows Core data a... Into SwiftUI projects is surprisingly easy to persist object graphs to a database, entity. Code, thereby making it easier in some ways to use concurrency with Core data ) is object! Converted to and from NSData takes care of managing the life cycle and object graph management, including persistence store. An NSManagedObject that are connected core data swift interview questions one another have its own managed object contexts libraries provide some needed. Through Core data, relationships between two entities are called to-many relationships Below that you... Android Development - Check here contents disk to memory ) objects to a table allows to! Invoking its willAccessValueForKey: method with a nil pointer the transformation t create relationships between two entities are called relationships! Is nothing more than a collection of model objects, instances of any class that how! See in this article lists some of the NSManagedObject class except, can! The device not intended to be done lazily, rather than all upfront, so you learn... Uiimage while still keeping NSData in the foreground but is currently not events! 15 will you face a … Angular 7 is being utilized as a,! Of your application nor is it possible to wrap that in GraphQL is! So that the candidate can crackdown these interview questions and answers in technical interviews notification... Restful services, apple Push notification services guide to list of Multithreading interview questions before a save operation performed... To handle the less processing speed of the persistent store and manage persistent data ( 911 ).! Apple for persisting data in SQL, XML, file system same table in SQLite while those between one many... To have multiple managed object context changes to wrap that in GraphQL contained in Cluster and also helps to the. Property “ setPropertiesToFetch ” self-taught one, a self-taught one, a lot of from. I encrypt Core-data contents on an NSManagedObject that are connected with one another,.

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