We all know how smartphones have changed our lives and how it has made everything so much fast and convenient. From accessing your bank account to buying a ticket or booking a cab, you have everything at your fingertips now.
These tasks have become more expedient because of the brilliant work of app developers. They develop an idea into reality with the help of a programming language, making the lives of users more straightforward and more convenient.
Why Should You Hire a Swift Developer?
Swift is an intuitive programming language designed and developed by Apple for macOS, iOS, watchOS, tvOS, and more. Swift is the most popular app programming language nowadays since it is a very convenient and powerful tool, and easy to integrate into the development workflow.
Hiring a Swift Developer with phenomenal skills can turn your ideas into reality by creating an app that will boost your business.
You need to make sure that you are recruiting the right person who not only matches the job description but also can work with the team and give the right boost to your business. The developer should also be a designer who can make the product user-friendly and attractive.
Understand that to make a good hiring decision, you must ask the right questions in the interview. Here are the top 10 questions along with their answers, which are going to help you hire Swift developers.
The Top-10 Interview Questions That Can Help You to Hire the Best Swift Developers
1. What are the advantages of using Swift?
ANSWER: Swift is one of the most quickly growing languages. By using Swift, one can easily develop a macOS or iOS software. It is incredibly fast and secure.
Here are some essential benefits of using Swift:
- Open Source: Swift can be used for free by anyone. Hence, it has a large supportive community and an abundance of useful third-party tools.
- Easy to Learn: Swift has a simplified syntax and grammar, which makes it easier to read and write. It requires less coding than Objective-C to perform a specific task.
- Improved Performance: The language was initially designed to outperform its predecessor. Swift is 40% faster and secure than Objective-C.
- Supported by Multiple Devices: Swift is not just limited to Apple devices. It also supports other devices, such as Linux or even Windows platform.
- Automatic Memory Management: Swift uses Automatic Memory Counting (AMC). AMC is a technology aimed to add a garbage collector function that wasn’t introduced to iOS before. Before ARC, iOS developers needed to manage memory manually and consistently manage retail counts of every class. It will increase your app performance without any lag.
- Interoperable with Objective-C: Developers can make mixed-language apps with both Operative-C and Swift files with the perfect combination of both.
2. What are the most critical features of Swift?
ANSWER: Here are some essential features of Swift:
- Closures unified with function pointers
- Tuples and multiple return values
- Functional programming patterns like map and filter
- Swift and to-the-point iteration over a range or collection
- Powerful built-in error handling
- Advanced control flow and execution structure with do, guard, defer, and repeat keywords
3. What are the Swift basic data types?
ANSWER: Swift uses a standard set of data types for different purposes.
- Int: Int is used to store an integer value
- Double and Float: Double and Float in Swift are used while working with decimal numbers
- Bool: Bool is used to store Boolean value. In Swift, it uses true or false conditions.
- String: String is used for storing text enclosed by double quotes in Swift
- Array: Array is a collection of elements in Swift
- Dictionaries: A dictionary is an unordered set of a particular type that is connected with a unique code.
4. Explain the different types of Swift iOS application states.
ANSWER: Here are the different Swift iOS application states:
• Not running: When the app has not been launched or was terminated during operation by the system
• Inactive: When it is running in the background but is currently not receiving any events.
• Active: When the app is running and receiving events.
• Background: When the app is running and executing code in the background
• Suspended: When the app remains in the memory but does not implement any code
5. What are the control transfer statements used in iOS Swift?
ANSWER: The control transfer statements used in iOS Swift are:
- Return
- Break
- Continue
- Fallthrough
6. How to Declare a Constant and a Variant in Swift?
ANSWER: In the Swift language, we can declare a constant variable by using ‘let’ keyword. We cannot change a continuous variable after initiation. We use the ‘var’ keyword to declare a variant variable. A variant variable can be further modified.
7. What is PLIST in iOS?
ANSWER: PLIST stands for Property List, which means a dictionary of value and key that can be stored in the file system with a .plist extension. Different types of property lists are:
- Binary Property List
- XML Property List
- ASCII Legacy Property List
8. What are the ways of passing data in Swift?
ANSWER: There are several ways of passing data in Swift, such as KVO, Delegate, NSNotification & Callbacks, Target-Action, etc.
9. What are the differences between class and structure?
ANSWER: Classes function as a pointer or a reference to places storing data. These reference types are allocated on heap memory. Since they serve as a pointer, classes can easily inherit data from one another.
On the other hand, structures are not referenced types. They store value types as data, which are allocated on stack memory. They can not inherit data since it causes problems in value slicing.
The data memory of a class can be protected, and the function members can be virtual and abstract. Hence, a class can have limitless features.
The data memory of structures, however, can not be protected. Moreover, the function members can not be virtual or abstract. Thus a structure has limited features, as compared to a class.
10. What is the use of double question mark ‘jQuery32108581048617510183_1597081523123’ in Swift?
ANSWER: A double question mark is used to provide a default value for a variable. It is a logical operator that checks if the value is nil, and functions accordingly.
Conclusion
Since people are actively on the internet during the pandemic, it is wise to build an online presence for your business. Along with Swift developers, you can also do so with a professional WordPress site or a mobile application.
The seemingly complex task can be easy if you know how to hire WordPress developers. All you need to do is to visit the right place, pick candidates who suit your needs, and discuss the terms correctly.
