Lyra Network Interview Questions and Answers

Q1. Internal Implementation of HashMap
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Q1. Introduce yourself
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Q2. Describe your project and the tools and technologies you have used in your project.
Ans. 
Developed a web application for online shopping using React, Node.js, and MongoDB.
• Web application for online shopping

• Used React for front-end development

• Utilized Node.js for back-end development

• Integrated MongoDB for database management
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Q3. What is multitenancy in your project? How did you handle it?
Ans. 
Multitenancy is the ability of a software system to serve multiple clients (tenants) with separate data and configurations.
• Implemented separate databases or schemas for each tenant

• Used a single codebase to serve multiple tenants with different configurations

• Ensured data isolation and security between tenants

• Managed tenant-specific customizations and settings
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Q4. Question about stored procedures and how parameters are used
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Q5. Questions about spring framework and MVC.
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Q6. Have you used jQuery? What is $ in Jquery?
Ans. 
Yes, I have used jQuery. $ in jQuery is a shorthand alias for jQuery.
• The $ symbol in jQuery is a shorthand alias for the jQuery function.

• It is commonly used to select elements in the DOM and perform actions on them.

• For example, $('p') selects all <p> elements on the page.
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Q1. What is your current CTC?
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Q2. What is your Expected CTC?
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Q3. Why are you willing to join us?
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Q4. Are you willing to relocate?
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Q1. Design a class that can give maximum 3 instance of that class, from 4th call it will repeat those instances.
Ans. 
Design a class that limits maximum 3 instances and repeats them from 4th call.
• Create a private static array to hold instances.

• Create a private static counter to keep track of instance count.

• Create a public static method to get instance of the class.

• In the method, check if counter is less than 3, create new instance and add to array, else return instance from array based on counter modulo 3.

• Increment counter after each ...read more
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Q1. Design simple model class for Shopping cart. Custom exception handling. Create a custom Immutable list.
Ans. 
Design a model class for shopping cart with custom exception handling and custom immutable list.
• Model class should have properties like cart items, total price, etc.

• Custom exception handling should be implemented for scenarios like adding invalid items to cart.

• Custom immutable list can be created using C# ReadOnlyCollection or ImmutableList.

• Immutable list should be used to store cart items to prevent accidental modific...read more
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Test was based on arrays and some dsa concepts.