10+ Senior Software Interview Questions and Answers

Implement a system to prevent double booking of the same seat in a bookmyshow-like application.

• Implement a locking mechanism to prevent simultaneous booking of the same seat by two users.

• Use a transactional approach to ensure atomicity of seat booking process.

• Display real-time seat availability to users to avoid conflicts.

• Notify users if the seat they are trying to book is no longer available.

• Implement a queue system to handle simultaneous booking requests for the same seat.

Explanation of concepts with real-life examples

• Abstraction: Using a TV remote without knowing the internal circuitry

• Encapsulation: A car driver only needs to know how to drive, not how the engine works

• Inheritance: A child inheriting traits from their parents

• Polymorphism: A shape can take on different forms, such as a square or a triangle

Service Registry is a centralized directory for managing information about services. Hibernate is an ORM tool for Java. Microservices pattern is an architectural style that structures an application as a collection of loosely coupled services.

• Service Registry is used for service discovery, load balancing, and failover in microservices architecture.

• Hibernate is an ORM tool that maps Java objects to database tables and vice versa, simplifying database interactions.

• Microservices...read more

SOLID principles are a set of five design principles for writing maintainable and scalable software.

• S - Single Responsibility Principle

• O - Open/Closed Principle

• L - Liskov Substitution Principle

• I - Interface Segregation Principle

• D - Dependency Inversion Principle

Remove repeated letters from a given string

• Iterate through the string and keep track of seen letters

• Use a set to store unique letters and build the result string

MVC Routing is a mechanism to map incoming requests to specific controller actions.

• Routing is used to define URL patterns and map them to specific actions in the controller.

• It helps to create clean and SEO-friendly URLs.

• Routing can also be used to pass parameters to the controller action.

• MVC Routing is a part of the ASP.NET framework.

• Example: RouteConfig.cs file in ASP.NET MVC application defines the routing rules.

Hooks in Angular are functions that allow developers to execute code at specific points in the component's lifecycle.

• Hooks are used to perform tasks like initialization, change detection, and destruction in Angular components.

• Examples of hooks in Angular include ngOnInit, ngOnChanges, ngOnDestroy, etc.

Polymorphism is the ability of an object to take on many forms. A real-life example is a vehicle.

• Polymorphism allows a vehicle object to take on different forms such as car, truck, or motorcycle

• Each form has its own unique properties and methods, but they all share common characteristics such as having wheels and an engine

• Polymorphism allows for more efficient and flexible code as it allows for the use of a single class to represent multiple objects

One disadvantage of the repository pattern is the potential for over-abstraction and complexity.

• Can lead to unnecessary complexity in simple applications

• May result in additional overhead and performance issues

• Difficult to implement complex queries efficiently

• Can lead to code duplication if not properly managed

Client project requirements are the specifications and expectations of the project from the client's perspective.

• Understanding the client's business needs and goals

• Identifying the scope of the project

• Defining the project timeline and budget

• Determining the project deliverables and milestones

• Ensuring clear communication with the client throughout the project

Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during the compilation phase.

• Variable and function declarations are hoisted to the top of their scope.

• Only declarations are hoisted, not initializations.

• Function declarations take precedence over variable declarations.

• Hoisting can lead to unexpected behavior if not understood properly.

An anagrams program checks if two strings are anagrams of each other.

• Create a function that takes in two strings as input

• Remove any spaces and punctuation from the strings

• Convert both strings to lowercase for case-insensitive comparison

• Sort the characters in both strings

• Check if the sorted strings are equal to determine if they are anagrams

Object-oriented programming principles in C# include encapsulation, inheritance, polymorphism, and abstraction.

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

• Inheritance: Allowing a class to inherit properties and behavior from another class.

• Polymorphism: Allowing objects to be treated as instances of their parent class.

• Abstraction: Hiding the complex implementation details and showing only the necessary features.