Infogain Senior Data Engineer Interview Questions and Answers

Remove duplicate objects from an array of multiple objects.

• Create a new array to store unique objects

• Loop through the original array and check if the object already exists in the new array

• If not, add it to the new array

• Return the new array

Maintain state by using a global variable or a state management system.

• Use a global variable to store the state and access it whenever needed.

• Use a state management system like Redux or MobX to manage the state.

• Avoid using local variables or closures to store state as they will be lost when the code is repeated.

• Consider using object-oriented programming principles to encapsulate state within objects.

• Use functional prog...read more

Design patterns are reusable solutions to common software problems. Android system uses various design patterns.

• MVC (Model-View-Controller) pattern is used in Android to separate UI logic from business logic.

• Singleton pattern is used to ensure only one instance of a class is created.

• Observer pattern is used to notify changes in data to multiple components.

• Builder pattern is used to simplify complex object creation.

• Adap...read more

Answers to various technical questions related to Java programming.

• Java is preferred for its platform independence, object-oriented nature, and vast community support.

• Functional programming in Java allows for more concise and readable code, and better support for parallel processing.

• Wrapper classes are used to convert primitive data types into objects, and vice versa.

• Fibonacci series is a sequence of numbers where each...read more