Nomura Research Institute Financial Technologies India Interview Questions, Process, and Tips

Design a class that limits maximum 3 instances and repeats them from 4th call.

• Create a private static array to hold instances.

• Create a private static counter to keep track of instance count.

• Create a public static method to get instance of the class.

• In the method, check if counter is less than 3, create new instance and add to array, else return instance from array based on counter modulo 3.

• Increment counter after each

Design a model class for shopping cart with custom exception handling and custom immutable list.

• Model class should have properties like cart items, total price, etc.

• Custom exception handling should be implemented for scenarios like adding invalid items to cart.

• Custom immutable list can be created using C# ReadOnlyCollection or ImmutableList.

• Immutable list should be used to store cart items to prevent accidental modific