Bajaj Finserv Android Developer Interview Questions and Answers

Use a HashSet to track duplicate elements in linear time complexity.

• Create a HashSet to store unique elements.

• Iterate through the array and check if the element is already in the HashSet. If it is, then it is a duplicate.

• Add the duplicate elements to a separate list or array.

Coroutines are a way to perform asynchronous operations in a sequential manner in Kotlin.

• Coroutines are lightweight threads that can be used for asynchronous programming.

• They allow for sequential code execution with suspend functions.

• Coroutines can be used for tasks like network calls, database operations, and UI updates.

• They are part of Kotlin's standard library and are supported in Android development.