Twinline Business Solutions Interview Questions and Answers

Memory leaks in Android can occur when objects are not properly released from memory, leading to performance issues.

• Avoid using static variables as they can hold references to objects longer than needed.

• Be cautious with context references, as holding onto them can prevent objects from being garbage collected.

• Use tools like LeakCanary to detect memory leaks and fix them before they become a problem.

Strong references prevent garbage collection, while weak references allow objects to be collected if no strong references exist.

• Strong references prevent the garbage collector from collecting an object as long as the reference is active.

• Weak references allow the garbage collector to collect an object if there are no strong references to it.

• Strong references are typically used for objects that should not be collected, w...read more

To make RecyclerView more performant, optimize item layout, use view recycling, implement pagination, and prefetch data.

• Optimize item layout by using ConstraintLayout for complex item views

• Implement view recycling to reuse existing views instead of creating new ones

• Implement pagination to load data in chunks and reduce memory usage

• Prefetch data to load items in advance for smoother scrolling

Broadcast Receiver is a component in Android that allows the app to receive and react to broadcast messages from other apps or the system.

• Broadcast Receiver is registered in the AndroidManifest.xml file or dynamically in code.

• It can listen for system-wide broadcast messages or custom broadcast messages sent within the app.

• Broadcast Receiver can perform actions like starting a service, updating UI, or triggering notific...read more

Services in Android are background components that perform long-running operations without a user interface.

• Services run in the background even if the app is not in the foreground.

• They can be used for tasks like playing music, downloading files, or syncing data.

• There are two types of services: started services and bound services.

• Started services are started with startService() and run independently of the app's lifecyc...read more