LinkedIn Spring Framework

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What is a transaction in the context of Spring Data?

• a sequence of actions representing a single unit of work managed as a single operation that can be either committed or rolled back
• a version-controlled schema change that is applied to a database
• an exchange or interaction between various worker nodes in a multithreaded environment
• an encoded message and response between various shards of a database

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What is a RESTful web service?

• Reactive Enterprise Status Transfer is a web service comprising a set of guidelines and technical constraints for web services that monitor and alert of a set of mission-critical resources.
• Reactive Enterprise State Transfer is a web service comprising a set of guidelines and technical constraints for web services that have access to resources and are async in nature.
• Redundant Enumerated State Transfer is a web service that provides redundancy in the case of failure and outlines technical constraints for web services that have access to resources.
• Representational State Transfer an architectural style for creating web services that includes client-server architecture, statelessness, cacheability, a layered system, and a uniform interface.

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Modularization of a concern that cuts across multiple classes is known as a(n) _____.?

• crosscut
• sidecut
• multiclass
• aspect

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What value does Spring Boot Actuator provide?

• It's a CLI that allows you to modify the configuration of a running Spring Boot application without the need for restarting or downtime.
• It provides out-of-the-box functionality that integrates with third-party metrics platforms to automatically scale up and down the number of instances of the Spring Boot application.
• It provides out-of-the-box functionality that integrates with third-party metrics platforms to automatically scale up and down the number of threads in threadpools.
• It helps monitor and manage a Spring Boot application by providing endpoints such as health checks, auditing, metrics gathering, and HTTP tracing.

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How are filters used in Spring Web?

• Filters are used with a checksum algorithm that will filter invalid bytes out of a byte stream request body and allow for processing of HTTP requests from the DispatcherRequestServlet.
• Filters are used with a checksum algorithm that will filter invalid bytes out of an octet stream multipart upload and allow for chained processing of WebDispatcherServlet requests.
• Filters are called before a request hits the DispatcherServlet. They allow for interception-style, chained processing of web requests for security, timeouts, and other purposes.
• Filters are used to validate request parameters out of the byte stream request body and allow for processing of requests from the DispatcherRequestServlet.

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