R Systems International Interview Questions and Answers

SOLID principles help in creating maintainable, scalable, and flexible software.

• SOLID principles help in creating software that is easier to maintain and extend.

• Single Responsibility Principle (SRP) ensures that a class has only one reason to change, leading to more modular and cohesive code.

• Open/Closed Principle (OCP) states that a class should be open for extension but closed for modification, allowing for easy chang...read more

Singleton design pattern ensures a class has only one instance and provides a global point of access to it.

• Create a private static instance of the class within the class itself.

• Provide a public static method to access the instance.

• Ensure the constructor of the class is private to prevent instantiation from outside the class.

• Example: Singleton pattern is commonly used in database connections to ensure only one connectio...read more

Dependency injection is a design pattern where components are provided with their dependencies rather than creating them internally.

• Dependency injection helps in achieving loose coupling between components.

• It makes components easier to test by allowing for easier mocking of dependencies.

• Use cases include injecting database connections, logging services, and external API clients into components.

Debugging a published dll involves using tools like Visual Studio debugger and logging mechanisms.

• Use Visual Studio debugger to attach to the process using the published dll

• Set breakpoints in the code to pause execution and inspect variables

• Use logging mechanisms to track the flow of execution and identify issues

• Check for any exceptions or errors thrown by the dll

Data seeding in Entity Framework involves pre-populating database tables with initial data. Mapping tables with entities involves defining relationships between database tables and entity classes.

• Data seeding in Entity Framework can be done using the 'Seed' method in the 'Configuration' class of the DbContext.

• To map tables with entities, use data annotations or Fluent API to define relationships between entities and da...read more

Scrum ceremonies are regular meetings held in Agile project management to facilitate communication and collaboration among team members.

• Sprint Planning: Setting goals and planning tasks for the upcoming sprint.

• Daily Stand-up: Short daily meetings to discuss progress, roadblocks, and plans for the day.

• Sprint Review: Demo of completed work to stakeholders for feedback.

• Sprint Retrospective: Reflection on what went well, w...read more

A sprint is a time-boxed period during which a specific amount of work must be completed.

• Sprints are typically 2-4 weeks long in Agile methodology

• At the beginning of a sprint, the team plans the work to be done and commits to completing it by the end of the sprint

• Sprints end with a review and retrospective to discuss what went well and what could be improved for the next sprint

Story points are estimates used in Agile methodology to measure the complexity and effort required for a task.

• Story points are typically assigned based on the perceived complexity, risk, and effort involved in a user story or task.

• They are not based on time, but rather on relative sizing compared to other tasks.

• Common scales for story points include Fibonacci sequence (1, 2, 3, 5, 8, 13, etc.) or t-shirt sizes (XS, S, ...read more

Product management focuses on the development and marketing of a specific product, while project management involves overseeing a specific project from start to finish.

• Product management is focused on the entire lifecycle of a product, from ideation to launch and beyond.

• Project management is focused on the successful completion of a specific project within a set timeframe and budget.

• Product managers work closely with c...read more

Yes, I have conducted usability testing to enhance user experience and ensure product effectiveness.

• Conducted usability tests on a mobile app, resulting in a 30% increase in user satisfaction scores.

• Facilitated remote usability testing sessions using tools like UserTesting and Lookback to gather real-time feedback.

• Created user personas and scenarios to guide testing, ensuring that the tasks were relevant to actual user...read more

Human Interface Guidelines provide design principles for creating intuitive and user-friendly interfaces.

• Consistency: Maintain uniformity in design elements across the application, e.g., using the same button styles.

• Feedback: Provide immediate feedback for user actions, such as highlighting a button when clicked.

• Accessibility: Ensure designs are usable for people with disabilities, e.g., using color contrast for readab...read more

MVC is a design pattern for organizing code in a web application, while WebAPI is a framework for building HTTP services.

• MVC stands for Model-View-Controller and is used for structuring code in a web application

• WebAPI is a framework for building HTTP services that can be accessed by various clients

• MVC is typically used for creating web applications with user interfaces, while WebAPI is used for creating APIs that can b...read more

SIP call flow involves signaling and media exchange between SIP devices with headers containing important information.

• SIP INVITE message is sent to initiate a call

• SIP 1xx responses indicate call progress

• SIP 2xx response confirms call establishment

• SIP ACK message acknowledges call setup

• SIP BYE message terminates the call

K8's Deployment refers to the deployment of applications on Kubernetes clusters.

• Kubernetes (K8s) is an open-source container orchestration platform used for automating deployment, scaling, and management of containerized applications.

• K8s Deployment involves defining the desired state of the application, creating deployment configurations, and managing the deployment process.

• Deployment resources in K8s include Pods, Rep...read more