IRIS Business Services Interview Questions, Process, and Tips

Have to solve 2 coding questions on coding platform

Q1. Oops concept in java, its significance
Ans. 
Oops concept in Java refers to Object-Oriented Programming principles like inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation hides the internal state of an object and restricts access to it.

• Polymorphism allows objects to be treated as instances of their parent class.

• Abstraction focuses on the essential characteristics
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Q2. Thread life cycle
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Q3. How microservices communicates
Ans. 
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 the network.
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Q4. Questions about Collection, hashmap
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Q5. Java 8 features, lambda, stream api coding question
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Q1. Project specific questions
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Q2. @autowired, @qualifier, @primary, @transient, @volatile keyword
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Q3. Use of static keyword
Ans. 
The static keyword in Java is used to create class-level variables and methods that can be accessed without creating an instance of the class.
• Static variables are shared among all instances of a class

• Static methods can be called without creating an instance of the class

• Static blocks are used to initialize static variables
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Q4. Dynamic method dispatch
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Q5. DB connections flow in spring boot
Ans. 
DB connections flow in Spring Boot involves configuring data source, creating connection pool, and managing transactions.
• Configure data source in application.properties or application.yml

• Use @EnableJpaRepositories to enable JPA repositories

• Create connection pool using HikariCP or Tomcat JDBC

• Manage transactions using @Transactional annotation
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Q6. Rest vs Soap web services
Ans. 
REST is lightweight, uses standard HTTP methods, and is more flexible. SOAP is more rigid, uses XML, and has built-in security features.
• REST uses standard HTTP methods like GET, POST, PUT, DELETE for communication.

• SOAP uses XML for communication and has built-in security features like WS-Security.

• REST is more lightweight and flexible, making it easier to work with in modern web development.

• SOAP is more rigid and has a ...read more
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Based on logical reasoning mostly

Easy to medium questions

Q1. Tell me about yourself
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Q1. Situational question
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Q1. Do you know SAFe
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Q1. What is difference between >Net and .Net Core
Ans. 
The main difference between .Net and .Net Core is that .Net Core is a cross-platform, open-source framework while .Net is Windows-only.
• Net Core is cross-platform, supporting Windows, macOS, and Linux

• .Net Core is open-source, allowing for community contributions and faster updates

• .Net Core is modular, allowing developers to include only the necessary components for their application

• .Net Core has better performance and s...read more
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Q1. Sql and PLSQL related questions
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Q2. Structural coding
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Q1. Project level questions
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Q1. Normal general discussion
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Q1. Manager Discussion
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Q1. SQL queries, Java string questions, collection hierarchy
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Q1. Oops concepts, keyboard
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Q1. About past experiences
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Q1. About previous work experience
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