SFC Environmental Technologies Interview Questions and Answers

Clean Architecture is a software design principle that separates concerns and promotes testability, maintainability, and scalability.

• Clean Architecture emphasizes separation of concerns by dividing the codebase into layers: Presentation, Domain, and Data.

• Each layer has its own responsibilities and dependencies flow inward, ensuring loose coupling and high cohesion.

• The Presentation layer handles user interactions and UI components.

• The Domain layer contains business logic and u...read more

Code can be verified before compile time using static code analysis tools.

• Static code analysis tools can detect potential bugs, security vulnerabilities, and coding errors before compilation.

• Examples of static code analysis tools include SonarQube, Checkstyle, and PMD.

• These tools can be integrated into the development process to ensure code quality and reduce the risk of errors.

• Static code analysis can also help enforce coding standards and best practices.

• Regular use of stati...read more

Co-routines are lightweight because they are non-blocking and do not require a separate thread.

• Co-routines are cooperative, meaning they can pause and resume execution without blocking the thread.

• They use fewer resources than threads because they do not require a separate stack or context switch.

• Co-routines can be used to perform asynchronous operations without the overhead of creating and managing threads.

• Example: In Android, co-routines can be used to perform network reques...read more

Sealed classes are used to restrict inheritance and provide a fixed set of subclasses.

• Sealed classes are used when we want to restrict the number of subclasses that can be created.

• They are useful when we have a fixed set of subclasses and we want to ensure that no other subclasses are created.

• Sealed classes can be used in conjunction with when expressions to provide exhaustive pattern matching.

• They are commonly used in Kotlin's own standard library, such as the Result class.

Sub components and qualifiers are used in Dagger 2 for modularization and dependency injection.

• Sub components allow for modularization of dependencies within a larger component.

• Qualifiers are used to differentiate between multiple dependencies of the same type.

• Sub components are created using the @Subcomponent annotation.

• Qualifiers are created using custom annotations with @Qualifier.

• Example: @Named("example") String exampleString;

• Example: @Subcomponent(modules = {ExampleModu...read more