DXC Technology Senior Software Developer Interview Questions and Answers

Communication between microservices is typically done through APIs, message queues, or event-driven architecture.

• Use RESTful APIs for synchronous communication between microservices

• Implement message queues like RabbitMQ or Kafka for asynchronous communication

• Utilize event-driven architecture with tools like Apache Kafka or AWS SNS/SQS

• Consider gRPC for high-performance communication between microservices

I will tackle escalations by first understanding the issue, prioritizing tasks, communicating effectively, and seeking help from senior team members if needed.

• Understand the root cause of the escalation

• Prioritize tasks based on urgency and impact

• Communicate effectively with stakeholders

• Seek help from senior team members if needed

MVC stands for Model-View-Controller, a software design pattern that separates the application into three main components.

• Model: Represents the data and business logic of the application.

• View: Represents the UI components of the application.

• Controller: Acts as an intermediary between Model and View, handling user input and updating the Model accordingly.

• MVC helps in organizing code, improving maintainability, and promo...read more

Index fragmentation in SQL occurs when the logical order of pages in an index does not match the physical order in the data file.

• Index fragmentation can lead to decreased query performance as the database engine has to scan more pages to retrieve data.

• Fragmentation can be caused by frequent insertions, deletions, or updates on the indexed columns.

• Rebuilding or reorganizing indexes can help reduce fragmentation and impr...read more

REST API is lightweight, flexible, and widely used, while SOAP API is more rigid and heavy.

• REST API uses standard HTTP methods like GET, POST, PUT, DELETE, while SOAP API uses XML for communication.

• REST API is stateless and can be cached, making it faster, while SOAP API is stateful and requires more bandwidth.

• REST API is easier to implement and understand, while SOAP API has more built-in security features.

• Examples: R

CTE stands for Common Table Expressions, used to create temporary result sets within a SQL query.

• CTE is defined using the WITH keyword in SQL.

• It helps in simplifying complex queries by breaking them into smaller, more manageable parts.

• CTEs can reference themselves recursively, making them useful for hierarchical data.

• Example: WITH cte AS (SELECT * FROM table_name) SELECT * FROM cte;

Print even and odd numbers between 1 to 20.

• Iterate from 1 to 20 and check if the number is even or odd.

• Use a conditional statement to determine if the number is even or odd.

• Print the number along with its type (even or odd).