Infosys Interview Questions, Process, and Tips for Experienced

Q1. Explain solid principle
Ans. 
SOLID principles are a set of five design principles that help developers create more maintainable and scalable software.
• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its subclasses with...read more
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Q2. Why we use Sealed class
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Sealed class is used to prevent inheritance and ensure that the class cannot be extended.
• Prevents inheritance, ensuring that the class cannot be extended

• Helps in maintaining code integrity and security

• Used when a class is not intended to be inherited or overridden
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Q3. Types of constructor
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Types of constructors include default, parameterized, copy, and static constructors.
• Default constructor has no parameters

• Parameterized constructor takes one or more parameters

• Copy constructor creates a new object as a copy of an existing object

• Static constructor is used to initialize static data members
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Q4. . net core features?
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ASP.NET Core is a cross-platform, high-performance framework for building modern, cloud-based, internet-connected applications.
• Cross-platform support allows development on Windows, macOS, and Linux

• High performance with improved speed and scalability

• Modular design for flexibility and easy maintenance

• Built-in dependency injection for better code organization

• Support for Docker containers for easy deployment
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Q5. Explain Startup file?
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Startup file is a configuration file in ASP.NET that specifies settings and behavior for the application.
• Startup file is typically named 'Startup.cs' in ASP.NET Core projects.

• It contains configuration for services, middleware, and the request processing pipeline.

• The 'ConfigureServices' method is used to add services to the dependency injection container.

• The 'Configure' method is used to configure the HTTP request pipel...read more
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Q6. Dependency injection
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Q7. Explain Api lifetimes
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API lifetimes refer to the duration for which an API is available and supported.
• API lifetimes can vary depending on the service provider or platform.

• Some APIs may have a limited lifetime and be deprecated after a certain period.

• Developers should be aware of API lifetimes to plan for potential changes or updates.

• Regularly check for updates or announcements regarding API lifetimes to stay informed.
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Q8. Diffrent between transient vs scope
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Transient objects are created each time they are requested, while scoped objects are created once per request.
• Transient objects are created every time they are requested, leading to potentially higher memory usage.

• Scoped objects are created once per request and are shared within the scope of that request.

• Example: Transient objects are typically used for lightweight services, while scoped objects are used for services t
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Oops concept projct to create as per requirement

Q1. Experiance in previous company
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Q2. Previo0us company deails
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Q1. Core java and collection frameworks
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A straightforward Data Structures and Algorithms question utilizing the Stream API.

Q1. What are @annotations in springboot? explain about @springBootApplication
Ans. 
Annotations in Spring Boot are used to provide metadata about the code. @SpringBootApplication is a meta-annotation that combines @Configuration, @EnableAutoConfiguration, and @ComponentScan.
• Annotations in Spring Boot are used to simplify configuration and reduce boilerplate code.

• @SpringBootApplication is a meta-annotation that enables the auto-configuration feature in Spring Boot.

• It combines @Configuration, @EnableAut...read more
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Easy coding round just to check the basics

Q1. What is lazzy evaluation
Ans. 
Lazy evaluation is a programming technique where expressions are not evaluated until their results are actually needed.
• Expressions are only evaluated when their results are needed

• Helps improve performance by avoiding unnecessary computations

• Commonly used in functional programming languages like Haskell
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Q2. What is time travel in delta tables
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Time travel in delta tables refers to the ability to query data as it existed at a specific point in time.
• Delta tables allow you to query data as it existed at a specific version or timestamp.

• This feature is useful for auditing, debugging, and analyzing historical data changes.

• You can use time travel queries with Delta Lake's versioning and timestamp capabilities.
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Q1. Salary negotiation
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Q2. Why want to join infy again
Ans. 
I want to join Infy again because of the great work culture, opportunities for growth, and the chance to work with talented individuals.
• Great work culture at Infy

• Opportunities for growth and development

• Chance to work with talented individuals
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