10+ TCS Senior Systems Engineer Interview Questions and Answers

To analyze a bug in production, I follow a systematic approach that involves identifying, reproducing, isolating, and resolving the issue.

• Identify the symptoms of the bug and gather relevant data such as logs, error messages, and user reports.

• Reproduce the bug in a controlled environment to understand its root cause.

• Isolate the bug by narrowing down the scope of the issue and ruling out other potential causes.

• Resolve the bug by implementing a fix and testing it thoroughly to ...read more

To add validation, scenario-based web API, and content negotiation, utilize frameworks like ASP.NET Core and tools like Swagger.

• Use ASP.NET Core for building web APIs with built-in validation features.

• Implement scenario-based testing using tools like Postman or Swagger to simulate different user interactions.

• Utilize content negotiation to allow clients to request data in different formats (e.g. JSON, XML) based on their preferences.

OOPs stands for Object-Oriented Programming. It is a programming paradigm based on the concept of objects.

• OOPs principles include Inheritance, Encapsulation, Polymorphism, and Abstraction.

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

• Encapsulation involves bundling data and methods that operate on the data within a single unit.

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

• Abstraction involves hiding the complex...read more

I want to work for TCS because of its reputation for innovation, global presence, and opportunities for career growth.

• TCS is known for its cutting-edge technology solutions and innovation in the IT industry

• TCS has a strong global presence with clients in various industries around the world

• TCS offers opportunities for career growth and professional development through training programs and mentorship

• I admire TCS's commitment to diversity and inclusion in the workplace

JDK is Java Development Kit, which includes JRE along with development tools. JRE is Java Runtime Environment, which is required to run Java applications.

• JDK includes JRE along with development tools like compiler and debugger

• JRE is only required to run Java applications

• JDK is needed for Java development, while JRE is needed for running Java programs

To find duplicates in tables, use SQL queries with GROUP BY and HAVING clauses.

• Use GROUP BY clause to group rows with the same values

• Use HAVING clause to filter groups with more than one row

• Example: SELECT column_name, COUNT(*) FROM table_name GROUP BY column_name HAVING COUNT(*) > 1

Exceptions in Java are handled using try-catch blocks to catch and handle errors that occur during program execution.

• Use try-catch blocks to catch exceptions and handle them gracefully

• Use finally block to execute code regardless of whether an exception is thrown or not

• Use throw keyword to manually throw exceptions

• Use throws keyword in method signature to declare that the method may throw certain exceptions

Agile is iterative and flexible, while waterfall is sequential and rigid.

• Agile focuses on delivering working software in short iterations, while waterfall follows a linear approach with distinct phases.

• Agile allows for changes and adaptations throughout the project, while waterfall requires detailed planning upfront.

• Agile promotes collaboration and communication among team members, while waterfall relies on strict documentation and processes.

• Agile is better suited for project...read more

Authorize filter works by granting or denying access to resources based on specified criteria.

• Authorize filter checks if the user has the necessary permissions to access a resource

• It can be configured to allow or deny access based on roles, claims, or other criteria

• Examples include role-based authorization where only users with admin role can access certain resources

Join is used to combine rows from two or more tables based on a related column between them.

• Join is used in SQL to retrieve data from multiple tables based on a related column.

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column;

Power BI is used for data visualization, business intelligence, and analytics.

• Power BI allows users to create interactive reports and dashboards

• It helps in analyzing data from various sources and gaining insights

• Users can easily share and collaborate on reports with others

• Power BI integrates with other Microsoft products like Excel and Azure

• It is widely used in businesses for decision-making and forecasting

ReactJS is a JavaScript library for building user interfaces.

• ReactJS is maintained by Facebook.

• It allows developers to create reusable UI components.

• ReactJS uses a virtual DOM for better performance.

• It follows a unidirectional data flow.

• ReactJS can be used to build single-page applications.

ETL process involves extracting data from various sources, transforming it to fit business needs, and loading it into a target database.

• Extract data from multiple sources such as databases, files, APIs, etc.

• Transform the data by cleaning, filtering, aggregating, and structuring it.

• Load the transformed data into a target database or data warehouse.

• ETL tools like Informatica, Talend, and SSIS are commonly used for this process.

Implemented Singleton and Factory design patterns in previous projects.

• Singleton pattern ensures only one instance of a class is created and provides a global point of access to it.

• Factory pattern provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.

• Other design patterns include Observer, Decorator, Adapter, and Strategy.

• Implemented these patterns in projects such as a web application for managing ...read more