10+ Hexaware Technologies Technical Lead Interview Questions and Answers

Some advanced features of .Net Core include cross-platform support, performance improvements, and support for modern development practices.

• Cross-platform support allows developers to build and run applications on different operating systems.

• Performance improvements such as faster startup times and lower memory usage.

• Support for modern development practices like containerization and microservices architecture.

• Built-in support for dependency injection and logging.

• Enhanced secur...read more

Session in .NET Core is used to store user-specific information across multiple requests.

• Use services.AddSession() in ConfigureServices method of Startup class to enable session

• Use app.UseSession() in Configure method of Startup class to add session middleware

• Access session data using HttpContext.Session property

• Example: HttpContext.Session.SetString("UserName", "JohnDoe") to store a string in session

• Example: string userName = HttpContext.Session.GetString("UserName") to retr...read more

The current project is a web application for managing inventory and sales.

• The project follows a MVC (Model-View-Controller) architecture

• Uses technologies like React for the front-end and Node.js for the back-end

• Database schema includes tables for products, customers, orders, etc.

• Implemented features like user authentication, product search, and order processing

Interface defines a contract for a class to implement, while abstraction hides the implementation details.

• Interface is a blueprint of a class that defines what methods a class must implement.

• Abstraction is a concept that hides the implementation details and shows only the functionality.

• Interfaces can have multiple inheritance, while abstraction can be achieved using abstract classes.

• Example: Interface 'Shape' may have methods like 'calculateArea()' and 'calculatePerimeter()',...read more

DI stands for Dependency Injection and is a design pattern used to increase flexibility and maintainability of code.

• DI is a technique where one object supplies the dependencies of another object instead of the object creating them itself.

• It helps in decoupling components, making them easier to test and reuse.

• DI containers like Spring Framework in Java are used to manage dependencies and inject them into objects.

• Example: Instead of hardcoding a database connection in a class, ...read more

Extension methods are a way to add new methods to existing types without modifying the original type.

• Extension methods are defined as static methods in a static class.

• They must be in the same namespace as the type being extended.

• They are called like instance methods on the extended type.

• Example: Adding a method to the String class to reverse a string.

Pipeline functions are a series of functions or tasks that are executed in a specific order to process data or perform actions.

• Pipeline functions help streamline complex processes by breaking them down into smaller, manageable tasks

• Each function in the pipeline takes input from the previous function and passes output to the next function

• Commonly used in data processing, automation, and software development workflows

Isolation levels define the level of visibility a transaction has on other concurrent transactions.

• Isolation levels include READ UNCOMMITTED, READ COMMITTED, REPEATABLE READ, and SERIALIZABLE.

• READ UNCOMMITTED allows dirty reads, READ COMMITTED prevents dirty reads but allows non-repeatable reads, REPEATABLE READ prevents non-repeatable reads but allows phantom reads, and SERIALIZABLE prevents all anomalies.

• Isolation levels are set at the transaction level and can impact concu...read more

Salary expectation is the amount of money a candidate expects to be paid for a specific job role.

• Salary expectation is usually discussed during the job interview process.

• Candidates may base their salary expectations on factors such as their experience, qualifications, industry standards, and cost of living.

• Employers may also consider the candidate's salary expectation when making a job offer.

• It is important for candidates to research the average salary for the specific job ro...read more

AD stands for Active Directory, a directory service developed by Microsoft for Windows domain networks.

• AD is used to store information about network resources such as computers, users, groups, and printers.

• It allows administrators to manage and secure access to resources within a network.

• AD uses a hierarchical structure with domains, trees, and forests to organize objects.

• Group Policy Objects (GPOs) can be used to apply settings and restrictions across multiple objects in AD....read more

Troubleshooting Oracle involves identifying and resolving issues with database performance, connectivity, and errors.

• Check database connectivity by testing connection using SQL*Plus or SQL Developer

• Review alert logs and trace files for error messages and performance issues

• Monitor database performance using tools like Oracle Enterprise Manager or AWR reports

• Check for resource contention issues such as high CPU or memory usage

• Review SQL statements for inefficiencies or errors t...read more

Middle tier is the layer of software that acts as a bridge between the front-end user interface and the back-end database.

• Middle tier handles business logic and processing of data

• It often includes application servers, web servers, and APIs

• Examples include Java EE, .NET Framework, and Node.js

OOPs concept in .NET refers to Object-Oriented Programming 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 complex implementation details and showing only the necessary features.

SOLID principles are a set of five design principles that help make software designs more understandable, flexible, and maintainable.

• Single Responsibility Principle (SRP) - A class should have only one reason to change.

• Open/Closed Principle (OCP) - Software entities should be open for extension but closed for modification.

• Liskov Substitution Principle (LSP) - Objects of a superclass should be replaceable with objects of its subclasses without affecting the functionality.

• Inter...read more

ACID properties in DB ensure data integrity and consistency

• Atomicity: All operations in a transaction are completed successfully or none at all

• Consistency: Data is always in a valid state before and after a transaction

• Isolation: Transactions are isolated from each other until they are completed

• Durability: Once a transaction is committed, changes are permanent and survive system failures

Inversion of Control (IoC) is a design principle where the flow of control is inverted compared to traditional programming.

• IoC is a design pattern where the control of flow is inverted from the traditional approach.

• In IoC, the control is passed to a framework or container that manages the flow of the application.

• Dependency Injection is a common implementation of IoC, where dependencies are injected into a class rather than the class creating them.