Xebia Interview Questions, Process, and Tips for Experienced

Q1. Stakeholder management
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Q2. Sprint review , planning
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Q1. What are Java 8 new features? Which of these have you used?
Ans. 
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
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Q2. Are you aware of Eviction Policy in Cache?
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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
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Q3. LRU in cache? WAP to demonstrate LRU in Cache.
Ans. 
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
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Q4. Implement Factory Pattern.
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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
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Q5. What are profiles in spring boot?
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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
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Q6. Which cache have you used? Why is Cache needed
Ans. 
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
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Q7. Have you worked on Kafka? How many partitions did your code have?
Ans. 
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.
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Binary Tree Implementation with example

Q1. Java 8 features and use case Coding program using stream Spring boot
Ans. 
Java 8 features like streams are used in Spring Boot for efficient data processing.
• Java 8 introduced streams for functional-style operations on collections.

• Streams allow for parallel processing of data, improving performance.

• Spring Boot applications can leverage streams for efficient data manipulation.

• Example: Using streams to filter and map data in a Spring Boot REST API.
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Q1. What projects I have worked on? What is Agile process?
Ans. 
I have worked on various projects including software development, system implementation, and process improvement.
• Implemented Agile methodology in software development projects to increase efficiency and collaboration

• Led cross-functional teams in daily stand-up meetings, sprint planning, and retrospectives

• Utilized tools such as Jira and Trello to track progress and manage tasks

• Worked on projects in industries such as fi
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Coding questions related to JavaScript and React concepts.

They seek a problem-solving approach and adherence to coding standards.

Q1. What are agile metrics?
Ans. 
Agile metrics are key performance indicators used to measure the progress and success of agile projects.
• Agile metrics help teams track productivity, quality, and delivery time.

• Examples of agile metrics include sprint burndown charts, velocity, lead time, and cycle time.

• These metrics provide insights into team performance and help identify areas for improvement.
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Q2. What are the tools used for calculating defect density?
Ans. 
Tools for calculating defect density include defect tracking tools, spreadsheets, and specialized software.
• Defect tracking tools like Jira or Bugzilla can automatically calculate defect density based on reported issues.

• Spreadsheets can be used to manually calculate defect density by dividing the total number of defects by the size of the software.

• Specialized software such as Quality Center or TestRail may have built-in...read more
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