LTIMindtree IOS Developer Interview Questions and Answers

Q1. What is optional, difference between struct and class?
Ans. 
Optional is a type in Swift that can hold a value or be nil. Struct and class are both used to define custom data types.
• Optional is denoted by a question mark (?) and is used to handle nil values.

• Structs are value types and are passed by value, while classes are reference types and are passed by reference.

• Structs have a default memberwise initializer, while classes do not.

• Classes can inherit from other classes, while s...read more
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Easy aptitude english and logical reasoning.

Q1. Tell me About yourself
Ans. 
I am an experienced IOS Developer with a passion for creating innovative and user-friendly mobile applications.
• Over 5 years of experience in IOS app development

• Proficient in Swift and Objective-C programming languages

• Strong understanding of mobile UI/UX design principles

• Familiar with RESTful APIs and third-party libraries

• Developed and launched multiple successful apps on the App Store
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Q2. Swift advantages and disadvantages
Ans. 
Swift is a powerful and modern programming language for iOS development, but it has its own set of advantages and disadvantages.
• Advantages: faster performance, safer code with optionals, easier to read and write code, interoperability with Objective-C

• Disadvantages: steep learning curve for beginners, limited community support compared to other languages like Java or Python
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Q1. Salary expectation and current salary
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Q1. Access specifiers
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Q2. Write code to get distinct members in array with same sequence
Ans. 
Use a Set to get distinct members in array while maintaining sequence.
• Iterate through the array and add each element to a Set to automatically remove duplicates.

• Create a new array by iterating through the Set to maintain the original sequence.
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Q1. Define Operation queue
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Operation queue is a way to manage and execute tasks asynchronously in iOS applications.
• Operation queue allows you to add tasks (operations) to a queue and execute them in the background.

• It provides control over the execution of tasks, such as setting dependencies between tasks.

• Operations can be added to the queue with different priorities, allowing for better task management.

• Example: NSOperationQueue is a class in iOS
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Q2. Define optionals in swift
Ans. 
Optionals in Swift are used to represent a value that may or may not exist.
• Optionals are denoted by adding a question mark (?) after the type declaration.

• They can either contain a value or be nil.

• Optionals must be unwrapped before using their value to avoid runtime errors.

• Optional binding and optional chaining are commonly used with optionals.
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