Xebia Senior Software Engineer Interview Questions, Process, and Tips

Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and default methods.

• Lambda expressions: Enable functional programming in Java by expressing instances of single-method interfaces (functional interfaces) concisely.

• Functional interfaces: Interfaces with a single abstract method, such as java.util.function.Function or java.util.function.Predicate.

• Streams: Allow for proce...read more

Eviction policy in cache determines which items should be removed when the cache reaches its maximum capacity.

• Eviction policy helps in managing the cache size and ensuring that the most relevant data is retained.

• Common eviction policies include LRU (Least Recently Used), LFU (Least Frequently Used), and FIFO (First In, First Out).

• For example, in LRU policy, the least recently accessed items are removed from the cache w

LRU (Least Recently Used) is a cache eviction policy where the least recently accessed items are removed from the cache when it reaches its capacity.

• LRU cache stores key-value pairs with a maximum capacity. When the cache is full, the least recently used item is evicted to make space for new items.

• Each time a key is accessed in the cache, it is moved to the front of the cache to indicate it was the most recently used i...read more

Factory pattern is a creational design pattern that provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.

• Create an interface or abstract class for the factory with a method to create objects

• Create concrete classes that implement the factory interface and return specific types of objects

• Client code uses the factory to create objects without k

Profiles in Spring Boot allow you to define different configurations for different environments.

• Profiles are used to customize application behavior based on the environment it is running in.

• You can define profiles in application.properties or application.yml using 'spring.profiles.active' property.

• Common profiles include 'dev', 'test', and 'prod' for development, testing, and production environments.

• You can have differ...read more

I have used Redis and Memcached. Cache is needed to improve performance by storing frequently accessed data in memory.

• Used Redis for key-value storage and Memcached for object caching

• Cache is needed to reduce database load and improve response time

• Helps in storing frequently accessed data in memory for quick retrieval

Yes, I have worked on Kafka. My code had 10 partitions.

• Yes, I have experience working with Kafka and have implemented code with multiple partitions.

• In one of my projects, I used Kafka with 10 partitions to distribute the workload efficiently.

• Having multiple partitions in Kafka helped in achieving high throughput and scalability for real-time data processing.