Xebia Interview Questions, Process, and Tips for Experienced

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
Answered by AI
Add your answer
Q2. Are you aware of Eviction Policy in Cache?
Ans. 
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
Answered by AI
Add your answer
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
Answered by AI
Add your answer
Q4. Implement Factory Pattern.
Ans. 
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
Answered by AI
Add your answer
Q5. What are profiles in spring boot?
Ans. 
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
Answered by AI
Add your answer
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
Answered by AI
Add your answer
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.
Answered by AI
Add your answer

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.
Answered by AI
Add your answer

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
Answered by AI
Add your answer

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.
Answered by AI
Add your answer
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
Answered by AI
Add your answer

Q1. Basic JS Question and React Native Design question
Add your answer
Q2. One Coding question regarding array 1. [{a:4},{a:3}] outpur should be [{a:7}]. React Native Interview Question is Show Flatlist with selected Elements
Add your answer
Q3. What is let var const
Ans. 
let, var, and const are keywords used for variable declaration in JavaScript.
• let is block-scoped and can be reassigned.

• var is function-scoped and can be reassigned.

• const is block-scoped and cannot be reassigned, but its value can be mutated.
Answered by AI
Add your answer
Q4. How to optimized react native application
Ans. 
Optimizing a React Native application involves improving performance and reducing resource usage.
• Use PureComponent and shouldComponentUpdate to prevent unnecessary re-renders

• Implement virtualized lists for long lists to improve performance

• Minimize the use of third-party libraries and optimize the ones you do use

• Use native modules for performance-critical tasks

• Optimize images and assets for smaller file sizes
Answered by AI
Add your answer

Q1. Life cycle hook asyn apex triggers
Add your answer
Q2. Asyn apex ,batch.future
Add your answer
Q3. Governer limit of salesforce
Ans. 
Governor limits in Salesforce are predefined limits that prevent abuse and ensure fair resource allocation.
• Governor limits apply to various aspects of Salesforce, such as Apex code, SOQL queries, DML operations, and email invocations.

• These limits are in place to maintain system performance, prevent infinite loops, and protect against resource hogging.

• Examples of governor limits include maximum CPU time, maximum number ...read more
Answered by AI
Add your answer
Q4. Soql queries on account and contact
Add your answer