Infosys Interview Questions, Process, and Tips

Apti, reasoning and verbal communication

Q1. What is CLR ?
Ans. 
CLR stands for Common Language Runtime, it is the virtual machine component of Microsoft's .NET framework.
• CLR is responsible for managing the execution of .NET programs.

• It provides services such as memory management, exception handling, and security.

• CLR compiles the intermediate language code into native code using Just-In-Time (JIT) compilation.

• It allows different languages to be used within the .NET framework, as lon...read more
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Q2. Difference between Kestrel and IIS
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Kestrel is a cross-platform web server while IIS is a Windows-only web server.
• Kestrel is a lightweight, open-source web server developed by Microsoft and optimized for ASP.NET Core applications.

• IIS (Internet Information Services) is a full-featured web server developed by Microsoft for Windows servers.

• Kestrel can be used as a standalone server or behind a reverse proxy like IIS or Nginx.

• IIS provides additional features...read more
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Q1. API Integration
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Q2. What is WSDL document
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WSDL document describes web services and their functionalities.
• WSDL stands for Web Services Description Language

• It is an XML document that describes web services and their functionalities

• WSDL defines the operations, input and output parameters, and data types used by a web service

• It allows clients to understand how to interact with a web service
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Q1. List out second largest salary using java 8
Ans. 
Using Java 8, find the second largest salary from a list of salaries.
• Sort the list of salaries in descending order using streams and lambda expressions.

• Skip the first element (largest salary) and find the first element (second largest salary).
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Q2. List all the sum of list
Ans. 
Calculate the sum of all elements in a list
• Iterate through the list and add each element to a running total

• Return the total sum at the end
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Q1. Write any Get API
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A simple example of a Get API
• Use a HTTP GET request to retrieve data from a server

• Include the endpoint URL in the request

• Handle the response data accordingly
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Q2. What is final class
Ans. 
A final class is a class that cannot be subclassed or extended.
• Final classes are declared using the 'final' keyword in Java.

• Final classes cannot have any subclasses.

• Final classes are often used for utility classes or classes that should not be modified or extended.
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Q3. What is static class
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A static class is a class that cannot be instantiated and can only contain static members.
• Static classes are used to group related methods and properties that do not require an instance of the class to be created.

• Static classes are declared using the 'static' keyword in C#.

• Static classes cannot be instantiated and cannot contain instance members.

• Example: 'Math' class in C# is a static class that contains static methods
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Q4. Explain OOPS concepts
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OOPS concepts are the foundation of object-oriented programming, including principles like inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the compl...read more
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Q5. Abstract Class vs Interface
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Abstract class is a class that can have both abstract and non-abstract methods, while interface is a contract that defines methods that a class must implement.
• Abstract class can have constructors, fields, and non-abstract methods.

• Interface can only have abstract methods and constants.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Abstract class is used to provide a common base fo...read more
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Q6. Java 8 features
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Q1. What is public, Private protected
Ans. 
Public, private, and protected are access modifiers in object-oriented programming languages.
• Public: accessible from anywhere, both within and outside the class

• Private: only accessible within the class where it is declared

• Protected: accessible within the class and its subclasses
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Q2. Tell us about your day to day working
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Q3. Difference between RestController and Controller
Ans. 
RestController is a specialized version of Controller in Spring framework for RESTful web services.
• RestController is used for creating RESTful web services in Spring framework.

• Controller is used for handling general web requests.

• RestController automatically serializes and deserializes request and response bodies as JSON.

• Controller can return any type of response, not just JSON.

• Example: @RestController vs @Controller in
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Q1. Legal Obligations if any ?
Ans. 
Legal obligations refer to the responsibilities and duties that individuals or organizations are required to fulfill under the law.
• Compliance with relevant laws and regulations

• Protection of confidential information

• Adherence to contractual agreements

• Respect for intellectual property rights

• Ensuring workplace safety and health standards

• Proper handling of customer data and privacy
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Q2. Salary discussion
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