MyCompliance Senior Scientific Officer Interview Questions, Process, and Tips

Use Java 8 lambdas to covert list of employees to map

• Use stream() method to convert the list to a stream

• Use Collectors.toMap() method to convert the stream to a map

• Specify the key and value mappings in the toMap() method

Microservices communicate through lightweight protocols like HTTP, messaging queues, and RPC.

• HTTP: RESTful APIs are commonly used for communication between microservices.

• Messaging queues: Services can communicate asynchronously through message brokers like RabbitMQ or Kafka.

• RPC (Remote Procedure Call): Services can directly call each other's functions over a network.

Transactions across microservices can be handled using distributed transactions or compensating transactions.

• Use distributed transactions to ensure all services commit or rollback together

• Implement compensating transactions to handle failures and maintain data consistency

• Consider using event sourcing or message queues to decouple services and ensure eventual consistency

Run time polymorphism is the ability of a method to behave differently based on the object it is called on.

• Run time polymorphism is achieved through method overriding in inheritance.

• It allows a subclass to provide a specific implementation of a method that is already provided by its superclass.

• The actual method that gets called is determined by the type of object at runtime.

• Example: Animal class has a method 'makeSound...read more

Singleton class in Java ensures only one instance of the class is created.

• Use private constructor to prevent instantiation from outside the class.

• Provide a static method to get the instance of the class.

• Use a private static variable to hold the instance of the class.