Cut and Style Salon Interview Questions and Answers

CharArray should be used to store passwords for security reasons.

• CharArray is more secure as it can be cleared from memory after use, unlike String which is immutable

• String objects are stored in the String pool and can be accessed by other parts of the program

• CharArray allows for more control over the password data and reduces the risk of exposure

Convert Monolith to Microservices involves breaking down a large application into smaller, independent services.

• Identify bounded contexts within the monolith

• Decompose the monolith into separate services based on identified bounded contexts

• Implement communication between services using APIs or messaging queues

• Use containerization technologies like Docker for deployment

• Implement service discovery and load balancing for efficient communication between services

API Gateway in Microservices acts as a single entry point for all client requests to access multiple microservices.

• API Gateway handles authentication, authorization, load balancing, caching, and routing of requests to appropriate microservices.

• It helps in decoupling client applications from individual microservices, providing a more centralized and manageable architecture.

• Examples of API Gateways include Netflix Zuul, Amazon API Gateway, and Kong.

Database connection pool in Java helps manage multiple database connections efficiently.

• Use a connection pool library like HikariCP or Apache DBCP.

• Set up the pool with a maximum number of connections, timeout settings, etc.

• Acquire and release connections from the pool as needed in your Java code.

Spring Actuator is a feature in Spring Boot that allows monitoring and managing the application.

• Spring Actuator provides endpoints to monitor application health, metrics, info, etc.

• It helps in understanding the internal state of the application and its performance.

• Actuator endpoints can be accessed over HTTP, providing useful information for monitoring tools.

• Example: /actuator/health, /actuator/metrics, /actuator/info

Prototype scope creates a new instance for each injection, while singleton scope creates a single instance for all injections.

• Prototype scope creates a new instance every time it is injected, while singleton scope creates a single instance for all injections.

• Prototype scope is useful when you want a new instance each time, like for stateful objects. Singleton scope is useful for sharing a single instance, like for stateless services.

• Example: In a web application, a prototype-...read more

Singly linked list implementation in Java

• Create a Node class with data and next pointer

• Implement methods for adding, removing, and traversing nodes

• Update pointers accordingly when adding or removing nodes