Clapingo IOS Developer Interview Questions and Answers for Freshers

Q1. Basic interview swift questions (medium to hard)
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Q2. Coding to find correct or whats wrong
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Machine test with collection view and api using url session

Q1. Technical questions of different scenarios
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Easy aptitude english and logical reasoning.

Q1. Tell me About yourself
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Q2. Swift advantages and disadvantages
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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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Find second greatest number from an array of duplicate items.

Q1. Briefly explain about your self and work experience
Ans. 
I am a Senior Android Developer with 5+ years of experience in developing mobile applications for various industries.
• Developed and maintained multiple Android applications from concept to deployment

• Proficient in Java, Kotlin, and Android SDK

• Experience with RESTful APIs, third-party libraries, and version control systems like Git

• Strong problem-solving skills and ability to work in a team environment

• Familiar with Agile d
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Q2. What is Higher order function
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Higher order function is a function that can take other functions as parameters or return functions as results.
• Higher order functions can be passed as arguments to other functions.

• Higher order functions can return functions as results.

• Examples include map, filter, and reduce functions in functional programming.
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Q3. What is inline keyword
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The inline keyword is used in Kotlin to suggest that a function should be inlined at the call site.
• Used to eliminate the overhead of function calls by copying the function code directly at the call site

• Helps in improving performance by reducing the function call overhead

• Should be used for small functions or lambdas to avoid unnecessary function call overhead
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Q1. Explain the Agail methodology
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Agile methodology is a project management approach that emphasizes flexibility, collaboration, and iterative development.
• Agile methodology focuses on delivering working software in short, iterative cycles called sprints.

• It values customer collaboration and responding to change over following a strict plan.

• Key principles include individuals and interactions over processes and tools, working software over comprehensive d...read more
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Q2. How do you handle the Team during your team lead experience
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Q1. IOS & Swift Basics
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Q2. 1 Coding question( String/ Array) Level
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Q3. Write Delegation example, They will show the code and ask whats wrong in the code & whats the o/p of the code. expect questions like Closure Capture List, InOut parameter
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Q1. This round was not based on iOS for me. Question was related to my past projects based on my resume.
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Q2. More focous on architectures and design patterns like MVC, MVVM, Viper, Solid, Clean coding
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Q1. Whats your expected Salary?
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Q1. Basic technical knowledge question
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Q2. Android related questions
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Q1. Communication skill
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Q2. Salary regarding questions
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Q1. What is Weak & Unowned , ARC?
Ans. 
Weak & Unowned references are used in ARC to prevent retain cycles in Swift programming.
• Weak references do not increase the retain count of an object, and automatically become nil when the object is deallocated.

• Unowned references do not keep a strong reference to the object, and can become a dangling pointer if the object is deallocated.

• ARC (Automatic Reference Counting) is a memory management system used in Swift to a
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Q2. What is Autoclosure?
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Autoclosure is a feature in Swift that automatically wraps an expression in a closure.
• Autoclosure is used to delay evaluation of an expression until it is actually needed.

• It is commonly used with functions that take closures as arguments, allowing the caller to pass in a regular value instead of a closure.

• Autoclosures are created by adding @autoclosure attribute before the closure's parameter type.
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Q3. Code snippets for optional binding, find error ?
Ans. 
Optional binding in Swift helps to safely unwrap optionals and check for nil values.
• Use if let or guard let to safely unwrap optionals and bind the value to a new constant or variable.

• Check for nil values before using the unwrapped value to avoid runtime errors.

• Example: if let name = optionalName { print(name) }

• Example: guard let age = optionalAge else { return }
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Q4. What are Access Controls/modifiers? public vs open?
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Access controls/modifiers determine the visibility and accessibility of classes, methods, and properties in object-oriented programming.
• public access control allows a class, method, or property to be accessed from anywhere in the code

• open access control allows a class to be subclassed outside of the module where it is defined

• public is commonly used in Swift for most cases, while open is used when you want to allow subc
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Q5. Protocol vs Closures?
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Protocols define a blueprint of methods, properties, and other requirements that a class or struct must adopt. Closures are self-contained blocks of functionality that can be passed around and used in your code.
• Protocols define a set of methods, properties, and other requirements that a class or struct must implement.

• Closures are self-contained blocks of functionality that can capture and store references to any consta...read more
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Q6. How you use GIT, How to manage conflicts?
Ans. 
I use GIT for version control and manage conflicts by resolving them through communication and collaboration.
• Regularly commit changes to keep track of progress

• Pull latest changes before making any updates to avoid conflicts

• Communicate with team members to resolve conflicts efficiently

• Use tools like Git merge or Git rebase to resolve conflicts

• Document resolution process for future reference
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Q1. What is Protocol Oriented Programming
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Protocol Oriented Programming is a programming paradigm in Swift that focuses on defining protocols to define behavior.
• POP is a way of designing code by defining protocols that describe a set of behaviors.

• It encourages composition over inheritance, allowing for more flexible and reusable code.

• By using protocols, you can define a blueprint of methods and properties that a type must implement.
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Q2. What is Concurrency
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Concurrency is the ability of a system to execute multiple tasks simultaneously.
• Concurrency allows multiple tasks to run at the same time, improving performance and responsiveness.

• It can be achieved through techniques like multithreading and asynchronous programming.

• Concurrency is important in iOS development for tasks like networking, data processing, and UI updates.
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Q3. What are types of memory management in iOS
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Types of memory management in iOS include Automatic Reference Counting (ARC) and Manual Reference Counting (MRC).
• Automatic Reference Counting (ARC) - manages memory automatically by keeping track of object references.

• Manual Reference Counting (MRC) - requires developers to manually manage memory by retaining and releasing objects.

• ARC is the default memory management system in iOS, while MRC is used in older codebases o...read more
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Fetch data from API and showcase it onto a table view in swift