Iris Software Interview Questions, Process, and Tips for Experienced

Coding test on Angular to test the basic concepts

Q1. Difference between promise vs observables?
Ans. 
Promises are used for a single async operation while observables are used for multiple async operations and can be cancelled.
• Promises are eager, meaning they start immediately upon creation.

• Observables are lazy, meaning they only start when subscribed to.

• Promises can only handle a single value or error, while observables can handle multiple values over time.

• Observables can be cancelled, while promises cannot.

• Promises a...read more
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Q2. What is call stack and event loop in JavaScript?
Ans. 
Call stack is a data structure that stores function calls in JavaScript, while event loop manages asynchronous operations.
• Call stack is a mechanism for managing function invocation in JavaScript.

• Functions are added to the call stack when they are invoked and removed when they are completed.

• Event loop is responsible for handling asynchronous operations in JavaScript.

• Event loop continuously checks the call stack and the ...read more
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Q1. Why do you want to join IRIS?
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Q1. Telephonic basic questions were asked about Java related technologies.
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Q1. Skill based questions as scenario based coding questions were asked. Not hard , average level. Here the focus is more towards your retention pawer rather than your understanding. Prepare java 8 features we...read more
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Q1. Normal stuff about our willingness to contribute and attitude.
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Q1. This happens after you join the company weird right? but it is okay to hire beforehand..
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Test conducted online - aptitude questions

Q1. Questions related to resume and work
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Q2. Tell me about yourself
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Q1. Technical questions and coding questions
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Q2. Coding skills test
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Q3. Core technology related questions
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Q4. Nothing much 😕
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Q1. Data structures and algorithms
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Q2. Design and analysis of project
Ans. 
Designing and analyzing a project involves creating a plan and evaluating its feasibility and effectiveness.
• Identify project goals and objectives

• Develop a detailed project plan including timelines and resources

• Conduct risk analysis and mitigation strategies

• Evaluate project outcomes and make adjustments as needed
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Q3. Design pattern such as singleton, factory, builder, interceptor, fascade
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Q4. Sql queries writing
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Q5. Sql queries questions
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Q6. Nothing much 😕
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Q1. Joining, and package discussion
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Q1. How Transaction propagation works in Hibernate?
Ans. 
Transaction propagation in Hibernate allows the management of multiple database operations within a single transaction.
• Hibernate supports different transaction propagation modes such as REQUIRED, REQUIRES_NEW, SUPPORTS, MANDATORY, NOT_SUPPORTED, and NEVER.

• The propagation mode determines how the transaction should be handled when a method is called within an existing transaction.

• REQUIRED is the default propagation mode,...read more
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Q1. Describe Spring MVC.
Ans. 
Spring MVC is a framework for building web applications in Java.
• Spring MVC is a part of the Spring Framework, which provides a model-view-controller architecture for developing web applications.

• It follows the MVC design pattern, where the model represents the data, the view represents the user interface, and the controller handles the requests and manages the flow of data.

• It provides features like request mapping, data...read more
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Q1. Basic Collection framework related stuffs, the few things of Java8 like Lambda Expression, Stream API, Functional Programming. Basic annotations of Springboot, lifecycle of spring bean. Difference between ...read more
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