è Spring interview questions Ø Marker interface : is the interface that doesn't has any constant or methods inside it. So it is a kind of meta data about the class which tells what extra the class will do. Example : Cloneable, serializable , repository in spring interfaces. Using this we can override clone method from object class. Ø Why we need marker interface? Coz it adds extra features , Ex: if we want to override clone method in above student class then it cant be done without implementing Cloneable interface, it will give cloneNotSupportException. è 5 most accuring annotations : Ø BeanCreationException: in case of circular dependency we get this exception . Ex A is dependent on B and vice versa so while creation of bean it will fail. Ø NoSuchBeanDefinationException : if the bean which is being autowired is not annotated with @Component / its bean is not instansiated in Spring container. Ø NoUniqueBeanDefinationsExc...
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