Techwin Labs IOS Developer Interview Questions and Answers

One coding question basic DSA related

Q1. Basic questions from Swift
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Q1. Struct vs class
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Structs are value types and classes are reference types in Swift.
• Structs are passed by value, while classes are passed by reference.

• Structs are copied when assigned to a new variable, while classes point to the same instance.

• Use structs for simple data types and classes for more complex objects.

• Example: struct Point { var x: Int, y: Int } vs class Person { var name: String, age: Int }
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Q2. Optional chaining
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Q1. Introduction about myself
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I am an iOS Developer with a passion for creating intuitive and user-friendly mobile applications, leveraging Swift and Objective-C.
• Over 5 years of experience in iOS development, working on apps like XYZ that have over 100,000 downloads.

• Proficient in Swift and Objective-C, with a strong understanding of UIKit and SwiftUI.

• Experience with RESTful APIs and integrating third-party libraries, such as Alamofire for networkin...read more
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Q2. Why do I want to switch Job
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I'm seeking new challenges and opportunities for growth in a dynamic environment that aligns with my career goals.
• Desire for professional growth: I'm looking for a role that offers more opportunities for learning and advancement.

• Interest in new technologies: I want to work with the latest iOS frameworks and tools to enhance my skills.

• Cultural fit: I'm seeking a company culture that values collaboration and innovation, ...read more
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Q1. Explain about protocol extensions
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Protocol extensions in iOS allow adding functionality to existing protocols without modifying the original protocol definition.
• Protocol extensions can provide default implementations for protocol methods.

• They can also add new methods and properties to conforming types.

• Protocol extensions are useful for adding common functionality to multiple types that conform to a protocol.

• Example: extending the Equatable protocol to ...read more
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Q2. Difference between merge and rebase
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Merge combines changes from different branches, while rebase moves the entire branch to a new base commit.
• Merge creates a new commit to combine changes, while rebase rewrites commit history.

• Merge preserves the commit history of all branches, while rebase creates a linear history.

• Merge is non-destructive and keeps the original branch intact, while rebase modifies the branch being rebased.

• Example: 'git merge feature-bran...read more
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Q3. Explain about Protocol equitability
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Protocol equitability ensures that all participants in a communication protocol have equal access and opportunity to send and receive data.
• Ensures fair and equal treatment of all participants in a communication protocol

• Prevents any participant from having an unfair advantage or disadvantage

• Promotes transparency and inclusivity in communication protocols
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Q1. Difference betweenClass And Struct
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Classes are reference types, while structs are value types in Swift.
• Classes are reference types, meaning they point to the same memory location 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.

• Classes can be typecasted, while structs cannot.
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Q2. Static Key work
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Find the index of the first occurrence in string

Q1. Salary Expectation
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Q2. Any leave plans in next six months
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Yes, I have planned a vacation in the next six months.
• I have scheduled a week-long trip to Europe in September.

• I also plan to take a few days off around Christmas to visit family.

• I have informed my team in advance and ensured that my work will not be affected.
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Q1. About my self
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Q2. Swit vs SwiftUI
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Swift is a programming language, while SwiftUI is a framework for building user interfaces in iOS apps using Swift.
• Swift is a general-purpose programming language introduced by Apple in 2014.

• SwiftUI is a declarative framework introduced in 2019 for building UI across all Apple platforms.

• Swift allows for imperative programming, while SwiftUI promotes a declarative style, making UI code more readable.

• Example of Swift: 'l...read more
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