Azentech Software Solutions Interview Questions, Process, and Tips

Swift 5 introduced ABI stability, improved performance, and new language features.

• ABI stability ensures compatibility between future Swift versions

• Improved performance with faster build times and reduced app size

• New language features include Result type, Raw strings, and Property wrappers

Completion handler is a closure that gets executed after a task is completed.

• Completion handlers are used to handle asynchronous tasks in iOS development.

• They are commonly used in network requests, animations, and other time-consuming tasks.

• Completion handlers take in parameters and return values, allowing for customization and flexibility.

• Example: URLSession.shared.dataTask(with: url) { data, response, error in // han

GCD (Grand Central Dispatch) is a concurrency framework that allows developers to perform tasks asynchronously.

• GCD is used to manage concurrent operations in iOS apps.

• It uses dispatch queues to manage tasks and execute them in parallel.

• GCD provides different types of queues such as serial, concurrent, and main queues.

• Example: DispatchQueue.main.async { // code to be executed on main queue }

• Example: DispatchQueue.global...read more

Steps to add collection view in Swift.

• Create a UICollectionView instance

• Set the delegate and data source of the collection view

• Implement the required methods of UICollectionViewDataSource and UICollectionViewDelegate protocols

• Register the cell class or nib file for the collection view

• Return the number of items and configure the cell in the data source methods

• Implement any additional delegate methods as needed