Eviden Tableau Developer Interview Questions and Answers for Freshers

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

Program to print a pattern and implement bubble sort on an array of strings.

• For pattern printing, use nested loops to print the desired pattern.

• For bubble sort, compare adjacent elements and swap if necessary.

• Use a loop to iterate through the array until no more swaps are needed.

Interfaces define a contract for classes to implement certain methods and properties.

• Interfaces allow for polymorphism and loose coupling.

• Classes can implement multiple interfaces.

• Interfaces cannot be instantiated on their own.

• Interfaces can have default method implementations.

• Interfaces can be used to enforce design patterns like the adapter pattern.