Contrado Imaging Software Developer Interview Questions, Process, and Tips

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

• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its sub...read more

I have used the Singleton design pattern in my projects.

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

• It is useful when you want to restrict the instantiation of a class to only one object.

• Example: Creating a Logger class that should have only one instance throughout the application.

Versioning in web API allows for managing different versions of the API to ensure compatibility with clients.

• Use URL versioning by including the version number in the URL path (e.g. /api/v1/resource)

• Use query string versioning by including the version number as a query parameter (e.g. /api/resource?version=1)

• Use header versioning by including the version number in a custom header (e.g. X-API-Version: 1)

I handle challenging situations by staying calm, analyzing the problem, seeking help if needed, and finding a solution.

• Remain calm and composed under pressure

• Analyze the problem thoroughly to understand the root cause

• Seek assistance from colleagues or mentors if necessary

• Brainstorm potential solutions and evaluate their feasibility

• Implement the best solution and monitor its effectiveness