iOS Interview Question & Answers from 150+ Interviews(Swift)

Course Curriculum

Chapter 1: Introduction

Lecture 1: Why this Course? What do you learn out of it?

Chapter 2: Tools Related Interview Questions?

Lecture 1: What is the current version of Swift?

Lecture 2: What is the latest Xcode you have used and Available?

Lecture 3: Whats new in latest iOS?

Lecture 4: What are the features of Swift and What makes Swift better than Objective-C?

Lecture 5: What is Program?

Chapter 3: Datatypes

Lecture 1: What is Datatype? list out few datatypes in Swift?

Lecture 2: let vs var?  Constant vs Variable?

Lecture 3: What is Type Inference? What is Type Annotation?

Lecture 4: How Swift is Type Safe Language?

Lecture 5: What is Type Casting? Give me an example?

Lecture 6: What is Tuple? When do we use Tuple?

Lecture 7: What is String Interpolation?

Lecture 8: What is Type Aliasing ?

Lecture 9: Can we use existing keyword as an identifier (variable)?

Lecture 10: What is the default type of Character and Float values?

Chapter 4: Operators in Swift

Lecture 1: What are the operators available in Swift?

Lecture 2: Explain different range operators in Swift?

Lecture 3: What is identity operator in swift?

Chapter 5: Control And Conditional Statements in Swift

Lecture 1: What are the conditional statements available in Swift ?

Lecture 2: What is fast enumeration in Swift?

Lecture 3: What is the difference between while and repeat-while loops in swift?

Lecture 4: What is switch case and how to declare a swift switch case?

Lecture 5: Is default case is necessary in Swift's Switch case?

Lecture 6: What is Fall-through keyword in swift?

Chapter 6: Enumerated datatypes in Swift?

Lecture 1: What is Enum?

Lecture 2: What is rawValue in enum?

Lecture 3: What is Enum Associated values in Swift?

Lecture 4: Is Enum Value type or Reference Type?

Lecture 5: What is the difference between Swift Enum and Objective-C Enum?

Chapter 7: Function & Methods in Swift

Lecture 1: What is function? What is the difference between function and Method?

Lecture 2: What is inout parameter in Swift?

Lecture 3: Instance method vs Type Method?

Lecture 4: What is variadic number of params method?

Lecture 5: How to set default value to a method input arguments ?

Chapter 8: Structures in Swift?

Lecture 1: What is struct? How to declare a structure?

Lecture 2: What is mutating keyword in Swift?

Lecture 3: Value Type vs Reference Type?

Lecture 4: Is struct Value type or Reference Type?

Chapter 9: Initialisers in Swift?

Lecture 1: What is initialiser? What are the different types of initialisers available?

Lecture 2: What is the default initialiser in Swift?

Lecture 3: What is parameterised / Custom initialiser?

Lecture 4: What is designated initialiser in swift?

Lecture 5: What is convenience initialiser in Swift?

Lecture 6: What is failable initialiser in Swift?

Lecture 7: Can I declare a convenience initialiser without designated initialiser?

Lecture 8: What is deinit? can we call deinit method?

Lecture 9: Designated vs convenience initialiser?

Chapter 10: Closures in Swift

Lecture 1: What is Closure? How to declare closures?

Lecture 2: How to avoid retain cycle in closures?

Lecture 3: What is escaping Closure? What is non-escaping closure?

Lecture 4: Does closures capture values?

Lecture 5: What is Trailing Closure?

Lecture 6: What is short hand syntax for Closures?

Chapter 11: Object Oriented Principles (OOPs)

Lecture 1: What are the Object Oriented Principles( OOPs) ?

Lecture 2: What is Class? How to declare it?

Lecture 3: What is Instance / Object?

Lecture 4: What is Property? How many types of Properties available in Swift?

Lecture 5: What is stored Property?

Lecture 6: What is Computed Property?

Lecture 7: What is Static Property or Type Property? How to declare them?

Lecture 8: What is lazy property?

Lecture 9: static keyword vs class keywords?

Lecture 10: What are Property observers ?

Lecture 11: What is get and set? How to declare get only property?

Lecture 12: Can a property has only setter(set)?

Lecture 13: Difference between Class vs Structures?

Lecture 14: What is Encapsulation? Example? Advantages?

Lecture 15: What is Inheritance? Advantages?

Lecture 16: What is Polymorphism?

Lecture 17: What is Dynamic Polymorphism / Overriding?

Lecture 18: What is Static Polymorphism / Overloading?

Lecture 19: What is Abstraction? How to achieve it?

Lecture 20: Does swift supports multiple inheritance?

Lecture 21: How to call a method with some delay?

Lecture 22: What is Static Binding?

Lecture 23: Is Swift Static Typed or Dynamic Typed Language?

Lecture 24: Is Objective-C Static Typed or Dynamic Typed Language?

Lecture 25: What is Static Typing?

Lecture 26: What is Dynamic Typing?

Lecture 27: What is Base / Root class in Swift?

Lecture 28: What is self and super keywords?

Lecture 29: Can we achieve Overriding without inheritance?

Lecture 30: When do you prefer struct over class?

Chapter 12: Optionals in Swift?

Lecture 1: What is Optional and How to declare an Optional?

Lecture 2: What is Optional Unwrapping and What are the different ways to unwrap optionals?

Lecture 3: What is Implicit Unwrapping and how to declare implicit unwrapped Optional?