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With Spring, we use the @ComponentScan annotation along with the @Configuration annotation to specify the packages that we want to be scanned. @ComponentScan without arguments tells Spring to scan the current package and all of its sub-packages.
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Ans. Spring is a Framework where we have to Build the Configurations Manually but Springboot have default configurations that allow faster bootstrapping. Spring Framework requires a number of dependencies to create a web app. Spring Boot, on the other hand, can get an application working with just one dependency.
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Ans. Instantiation by using:
InitializingBean callback interface.
Custom init() method from the bean configuration file.
Aware interfaces for distinct actions.
PostConstruct and PreDestroy annotations.
Destruction.
DisposableBean callback interface
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