OneCard Interview Questions and Answers

I am confident in my ability to effectively collect payments and resolve any issues that may arise.

• I have experience in collections and am familiar with various payment methods

• I am skilled in communicating with customers to resolve payment issues

• I am able to work with customers to set up payment plans if necessary

• I am knowledgeable about relevant laws and regulations regarding collections

• I am able to maintain accurate records of all collection activities

Yes

• Java uses pass by value for all variables, including object references.

• When an object reference is passed as an argument, a copy of the reference is passed, not the actual object.

• Modifying the reference inside the method will not affect the original reference outside the method.

• However, modifications to the object's state inside the method will be visible outside the method.

Cross-selling involves identifying opportunities to sell additional products or services to existing customers.

• Identify customer needs and preferences

• Recommend relevant products or services based on customer's profile

• Utilize customer data and feedback to tailor cross-selling strategies

• Provide personalized recommendations to enhance customer experience

Singleton pattern restricts the instantiation of a class to a single object.

• Singleton pattern ensures that only one instance of a class exists throughout the application.

• It provides a global point of access to the instance.

• Commonly used in scenarios where a single instance needs to coordinate actions across the system.

• Example: Database connection manager, logger, configuration manager.

HashMap is implemented using an array of linked lists to handle collisions.

• HashMap stores key-value pairs in an array of linked lists

• Hash function is used to determine the index of the array where the key-value pair will be stored

• Collision handling is done by chaining, where multiple key-value pairs with the same hash value are stored in the same linked list

• HashMap allows null keys and values

• HashMap is not synchronized by default, use ConcurrentHashMap for thread-safe operati...read more