Newton School: Pay after Placement IOS Developer Interview Questions and Answers

Q1. What's the difference between Class and Struct
Ans. 
Classes are reference types, while structs are value types in Swift.
• Classes are reference types, meaning they are passed by reference, while structs are value types, passed by value.

• Classes support inheritance, while structs do not.

• Classes have deinitializers, while structs do not.

• Classes can have reference counting for memory management, while structs do not.

• Example: Class - Person, Struct - Point
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Q2. What is ARC and what's retain count
Ans. 
ARC stands for Automatic Reference Counting, a memory management system used in iOS development. Retain count is the number of references to an object.
• ARC is a memory management system in iOS that automatically tracks and manages memory usage.

• Retain count is the number of strong references to an object, which determines when the object should be deallocated.

• When an object's retain count reaches 0, it is deallocated fro...read more
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