Wissen Infotech IOS Developer Interview Questions and Answers

I expect a competitive salary based on my experience and skills.

• I have a strong background in iOS development and have successfully completed several projects.

• I am familiar with the latest technologies and frameworks in iOS development.

• I have a proven track record of delivering high-quality code on time and within budget.

• I am confident that my skills and experience make me a valuable asset to any team.

• I am open to disc...read more

I worked as an iOS Developer at XYZ Company.

• Developed and maintained iOS applications using Swift and Objective-C.

• Collaborated with cross-functional teams to gather requirements and deliver high-quality products.

• Implemented new features and enhancements based on user feedback.

• Optimized app performance and resolved bugs and issues.

• Worked on integrating third-party libraries and APIs.

• Participated in code reviews and prov...read more

I am looking for a change to explore new opportunities and challenges in my career.

• Seeking growth and advancement in my professional journey

• Want to work on more challenging projects

• Desire to learn new technologies and expand my skillset

• Looking for a better work-life balance

• Seeking a company culture that aligns with my values and goals

I am an experienced iOS developer with a passion for creating user-friendly and efficient applications.

• I have been developing iOS applications for over 5 years.

• I am proficient in Swift and Objective-C programming languages.

• I have experience working with various frameworks and libraries such as UIKit, Core Data, and Alamofire.

• I have a strong understanding of iOS design patterns and best practices.

• I have successfully del...read more

Questions about basic Swift knowledge and past work experience.

• Basic Swift concepts such as optionals, closures, and protocols may be asked.

• Questions about past projects and how you approached problem-solving may also be asked.

• Examples of past work experience and projects may be requested.

• Questions about Swift syntax and best practices may be asked as well.

Clean coding principles ensure code readability, maintainability, and scalability.

• Use meaningful variable and function names

• Keep functions short and focused

• Avoid code duplication

• Follow SOLID principles

• Write unit tests

• Refactor regularly

diff is used to compare two collections and return the differences, while guard is used for early exit in a function if a condition is not met.

• diff is a method used in Swift to compare two collections and return the differences.

• guard is a keyword used in Swift to provide an early exit from a function if a condition is not met.

• Example: let array1 = [1, 2, 3, 4], array2 = [3, 4, 5, 6]; let result = array1.diff(array2) //...read more

GCD stands for Grand Central Dispatch, a technology used in iOS for managing concurrent operations. Multithreading is the ability of a CPU to execute multiple threads concurrently.

• GCD is used for managing tasks asynchronously and efficiently utilizing system resources.

• Multithreading allows multiple tasks to run concurrently, improving performance and responsiveness of an application.

• Example: Using GCD to download image...read more

ARC (Automatic Reference Counting) in Swift is a memory management system used to automatically manage memory allocation and deallocation.

• ARC keeps track of how many references there are to an object and automatically deallocates it when there are no more references.

• Use strong reference cycles can lead to memory leaks, so use weak or unowned references to break the cycle.

• ARC is the default memory management system in S...read more

MVVM (Model-View-ViewModel) is an architectural design pattern commonly used in iOS development to separate concerns and improve code maintainability.

• MVVM separates the user interface (View) from the business logic (ViewModel) and data (Model).

• ViewModel acts as an intermediary between the View and the Model, handling user interactions and updating the data.

• Swift provides tools like Combine framework for reactive progra...read more

Objective-C is the older language used for iOS development, while Swift is the newer, more modern language.

• Objective-C is a superset of C with Smalltalk-style messaging syntax.

• Swift is more concise and easier to read than Objective-C.

• Swift is safer due to its optionals and type interference features.

• Objective-C has been around longer and has a larger codebase, but Swift is becoming more popular.

• Many developers prefer S...read more