Invaccs Software Technologies IOS Developer Interview Questions and Answers

Bounds refer to the content area of a view, while frame refers to the position and size of a view within its superview.

• Bounds are relative to the view's own coordinate system, while frame is relative to its superview's coordinate system.

• Changing the bounds of a view affects the position and size of its subviews, while changing the frame affects the position and size of the view itself.

• For example, if a view has a frame...read more

I have worked on MVVM architecture in my previous project.

• MVVM stands for Model-View-ViewModel.

• It separates the UI logic from the business logic.

• The View interacts with the ViewModel, which in turn interacts with the Model.

• I used RxSwift for binding the ViewModel and View in my previous project.

Access control refers to the process of restricting or granting access to resources based on user identity and permissions.

• Role-based access control (RBAC) - access is granted based on the user's role within an organization

• Attribute-based access control (ABAC) - access is granted based on specific attributes of the user, such as job title or department

• Discretionary access control (DAC) - access is granted at the discre...read more

Lazy property delays the initialization of a property until it is accessed for the first time.

• Lazy properties are useful when the initialization of a property is expensive and not always needed.

• They can improve performance and memory usage by delaying the initialization until it is actually needed.

• They are declared using the 'lazy' keyword and must be variables, not constants.

• Example: lazy var myProperty = expensiveIni...read more

UITableView for displaying data in a list format, UICollectionView for displaying data in a grid or custom layout.

• Use UITableView for displaying data in a list format, such as a contact list or a news feed.

• Use UICollectionView for displaying data in a grid or custom layout, such as a photo gallery or a calendar.

• UITableView is simpler to implement and more efficient for displaying large amounts of data.

• UICollectionView ...read more