Icreon Communications Interview Questions and Answers

Dependency injection is a design pattern that allows objects to receive dependencies rather than creating them internally.

• Dependency injection is used to decouple components and improve code maintainability.

• It involves injecting dependencies into a class through its constructor, method, or property.

• There are three types of dependency injection: constructor injection, setter injection, and interface injection.

• Frameworks...read more

SOLID is a set of principles for object-oriented programming to make software more maintainable, scalable and robust.

• SOLID stands for Single Responsibility, Open-Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion principles.

• Single Responsibility Principle (SRP) states that a class should have only one reason to change.

• Open-Closed Principle (OCP) states that a class should be open for extension...read more

To build a highly scalable and highly available application using AWS services only, one can use services like EC2, S3, RDS, ELB, Auto Scaling, and CloudFront.

• Use EC2 instances for compute power

• Use S3 for storage

• Use RDS for database management

• Use ELB for load balancing

• Use Auto Scaling for automatic scaling of resources

• Use CloudFront for content delivery

• Use AWS Lambda for serverless computing

• Use Amazon Route 53 for DNS

Service-Oriented Architecture (SOA) and Micro-Services Architecture (MSA) are two different approaches to software architecture.

• SOA is a design pattern where services are provided to other components via a communication protocol over a network.

• MSA is an architectural style where software is composed of small, independent services that communicate with each other using APIs.

• SOA focuses on reusability and interoperabilit...read more