Infosys Interview Questions, Process, and Tips

A list in Python is a collection of items that are ordered and mutable.

• Lists are created using square brackets []

• Items in a list can be of different data types

• Elements in a list can be accessed by index

• Lists can be modified by adding, removing, or changing elements

A tuple in Python is an immutable collection of elements, similar to a list but cannot be changed once created.

• Tuples are created using parentheses ()

• Elements in a tuple can be of different data types

• Tuples can be accessed using indexing or slicing

• Example: my_tuple = (1, 'hello', True)

Useeffect is a hook in React that allows performing side effects in function components.

• Useeffect is used to perform side effects in function components.

• It runs after every render by default.

• It can be used to fetch data, subscribe to events, or update the DOM.

• It can also clean up effects by returning a function.

• Dependencies can be specified to control when the effect runs.

useState is a hook in React that allows functional components to have state.

• useState is a built-in hook in React.

• It allows functional components to have stateful logic.

• useState returns an array with two elements - the current state value and a function to update that value.

• Example: const [count, setCount] = useState(0);

SDLC lifecycle stands for Software Development Life Cycle, which is a process used by software development teams to design, develop, and test high-quality software.

• SDLC lifecycle consists of several phases including planning, analysis, design, implementation, testing, and maintenance.

• Each phase has its own set of activities and deliverables to ensure the successful completion of the software project.

• Examples of SDLC mo...read more

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

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

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

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

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

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.

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

SAP is an enterprise resource planning software while S4 HANA is the latest version of SAP with in-memory database technology.

• SAP is an ERP software used for managing business operations and customer relations.

• S4 HANA is the next-generation business suite built on the SAP HANA in-memory database platform.

• SAP offers various modules like FI, CO, MM, etc. while S4 HANA provides real-time analytics and processing capabilit...read more

Accounts payable is a sub-ledger in SAP FI that records all invoices and payments to vendors.

• Configuration steps include defining vendor master data, setting up tolerance groups, defining document types for vendor invoices, and assigning number ranges for vendor invoices.

• Process involves receiving invoices from vendors, verifying the accuracy of the invoices, posting the invoices in the system, and making payments to v...read more

Accounts receivable is the money owed to a company by its customers for goods or services delivered.

• Configuration steps include defining customer account groups, assigning number ranges, setting up tolerance groups, and defining dunning procedures.

• Accounts receivable transactions are posted using transaction code F-28.

• Accounts receivable reports can be generated using transaction code FBL5N.

Object-oriented programming concepts including 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 complex implementation details and showing only t