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Wipro
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Encryption and decryption in Swift involves using cryptographic algorithms to encode and decode data securely.
Use common encryption algorithms like AES or RSA for encryption.
Implement encryption using libraries like CommonCrypto or CryptoSwift.
Store encryption keys securely and use secure protocols for data transmission.
Example: Encrypting a string using AES encryption in Swift.
Keychain access in Swift allows secure storage of sensitive information like passwords, tokens, etc.
Use Keychain Services API to securely store and retrieve sensitive data.
Keychain items are stored securely in the device's keychain and are encrypted.
Access keychain items using unique identifiers called keys.
Use Keychain Swift library for easier implementation.
Classes are reference types, while structs are value types in Swift.
Classes are reference types, meaning they point to the same instance in memory when assigned to a new variable.
Structs are value types, meaning they create a new copy when assigned to a new variable.
Use classes for complex data structures or when you need inheritance, use structs for simple data types or when you want value semantics.
Example: class Per...
Grand Central Dispatch (GCD) is a technology in Swift for managing concurrent operations.
GCD allows developers to perform tasks concurrently without having to manage threads manually.
It provides a high-level API for managing tasks and executing them on different queues.
Developers can use GCD to perform tasks in the background, update the UI on the main thread, and more.
I applied via LinkedIn and was interviewed before Aug 2023. There were 2 interview rounds.
What people are saying about Wipro
I applied via Campus Placement and was interviewed before Apr 2023. There were 2 interview rounds.
90mins of aptitude test after clearing interview
1hr of coding test then final interview
Wipro interview questions for designations
Objective-C is the older language used for iOS development, while Swift is the newer, more modern language.
Objective-C is a superset of C with Smalltalk-style messaging syntax.
Swift is more concise and easier to read than Objective-C.
Swift is safer due to its optionals and type interference features.
Objective-C has been around longer and has a larger codebase, but Swift is becoming more popular.
Many developers prefer S...
Struct is value type while Class is reference type in Swift. Structs are passed by value while Classes are passed by reference.
Structs are ideal for small data types like coordinates, colors, etc.
Classes are ideal for larger data types like view controllers, network managers, etc.
Structs are immutable by default while Classes are mutable.
Structs cannot inherit from other types while Classes can.
Structs are stack alloca
I applied via Walk-in and was interviewed before Sep 2023. There were 2 interview rounds.
Serialisation in API is the process of converting data into a format that can be easily transmitted over a network.
Serialisation is used to convert complex data structures into a format that can be easily transmitted over a network.
It involves converting objects or data structures into a stream of bytes that can be sent over a network.
JSON and XML are commonly used formats for serialising data in APIs.
Serialisation is ...
Codable is a protocol in Swift that allows for easy encoding and decoding of data types to and from external representations.
Codable protocol is used to convert custom data types to and from external representations such as JSON, plist, etc.
It requires the types to conform to Encodable and Decodable protocols.
Codable protocol provides default implementations for encoding and decoding.
Example: struct Person: Codable { v...
MVVM is an architectural design pattern that separates the user interface code from the business logic and data model.
MVVM stands for Model-View-ViewModel
Model represents the data and business logic
View displays the UI elements and interacts with the user
ViewModel acts as a mediator between the Model and View, handling user inputs and updating the Model
MVVM helps in achieving separation of concerns and making the code
Classes are reference types, while structs are value types in Swift.
Classes are reference types, meaning they point to the same instance in memory when assigned to a new variable.
Structs are value types, meaning they create a new copy when assigned to a new variable.
Classes support inheritance, while structs do not.
Classes can have deinitializers, while structs cannot.
Example: class Person { var name: String } vs struc
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I applied via Company Website and was interviewed in Jul 2020. There was 1 interview round.
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