Blue Yonder Lead Software Engineer Interview Questions, Process, and Tips for Experienced

Q1. Ways to send data from JCL to COBOL
Ans. 
Data can be sent from JCL to COBOL using parameters, files, or shared memory.
• Passing parameters through JCL PROC statement

• Writing data to a file in JCL and reading it in COBOL program

• Using shared memory to communicate between JCL and COBOL
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Q2. What are cursors?
Ans. 
Cursors are database objects used to retrieve data from result sets one row at a time.
• Cursors are used in database management systems to navigate through a result set.

• They allow for processing individual rows of a result set instead of fetching the entire set at once.

• Cursors can be used in SQL queries to perform operations on each row of a result set.
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Q3. Checkpoint in Db2
Ans. 
Checkpoint in Db2 is a mechanism used to ensure data consistency during recovery.
• Checkpoints are used to write all modified data from the buffer pool to the disk.

• They help in reducing the amount of work needed during database recovery.

• Checkpoints can be triggered manually or automatically based on configuration settings.
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Q1. Overall experience
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Q1. Application architecture
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Q1. Java 8, stream operations, collection framework in depth
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Q2. Microservice architecture with sprong boot
Ans. 
Microservice architecture with Spring Boot is a popular approach to building scalable and resilient applications.
• Spring Boot provides a convenient way to create and deploy microservices

• Each microservice should have a clear and well-defined responsibility

• Communication between microservices can be achieved through REST APIs or messaging systems like Kafka

• Containerization with Docker and orchestration with Kubernetes can ...read more
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Q3. Spring security and transaction management
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Q1. Current Project in depth, roles and responsibilities
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Q2. Reason for change, design patterns
Ans. 
Design patterns are used to solve common software design problems and improve code quality.
• Design patterns provide reusable solutions to common software design problems.

• They improve code quality by promoting best practices and reducing code complexity.

• Examples of design patterns include Singleton, Factory, and Observer patterns.

• Reasons for changing design patterns may include improving performance, scalability, or main...read more
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Q3. Amazon web services, cloud front, lambda, ec2
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Q1. What are your salary expectations?
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Q2. Why are you looking for a change?
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Prepare well on Java and Data Structure algorithm

Q1. Graph related question on DSA
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Q1. Manager round team leading scenarios
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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?
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
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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.
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
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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
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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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Q1. Core java questions and collections in detail.
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Q1. Questions on collections.
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Q2. Collections, sql, mutithreading and little but about project.
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Q1. Mainly salary negotiations happned at this round
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