SDE - 1

There are five scope supported in the Spring Framework. They are as follows:
1. Singleton: When utilizing this, the scope of the bean specification is limited to a single instance per IoC container.
2. Prototype : The scope of a single bean definition can be any number of object instances.
3. Request : An HTTP request is the scope of the bean specification.
4. Session : HTTP-session is the scope of the bean specification in this case.
5. Global Session : The scope of the bean definition in this case is a Global HTTP session.

The Bean life cycle is as follows:
1. The IoC container instantiates the bean based on the XML file's definition.
2. Spring then uses dependency injection to populate all of the properties as stated in the bean definition.
3. SetBeanName() is called by the bean factory container, which takes the bean ID and requires the matching bean to implement the BeanNameAware interface.
4.The factory then calls setBeanFactory() with an instance of itself as a parameter (if BeanFactoryAware interface is implemented in the bean).
5. If a bean is associated with BeanPostProcessors, the preProcessBeforeInitialization() methods are called.
6. It will be called if an init-method is given.
7. Finally, if there are any BeanPostProcessors connected with the bean that need to be executed after instantiation, the postProcessAfterInitialization() methods will be called.

1. The throw keyword is used inside a function. It is used when it is required to throw an Exception logically. The throws keyword is used in the function signature. It is used when the function has some statements that can lead to exceptions.
2.The throw keyword is used to throw an exception explicitly. It can throw only one exception at a time.The throws keyword can be used to declare multiple exceptions, separated by a comma. Whichever exception occurs, if matched with the declared ones, is thrown automatically then.
3.Syntax of throw keyword includes the instance of the Exception to be thrown. Syntax of throws keyword includes the class names of the Exceptions to be thrown.

1. JDK(Java Development Kit) is used to develop Java applications. JDK also contains numerous development tools like compilers, debuggers, etc. JRE(Java Runtime Environment) is the implementation of JVM(Java Virtual Machine) and it is specially designed to execute Java programs.
2. JDK is mainly used for the execution of code and its main functionality is development. JRE is mainly used for creating an environment for code execution.
3. JDK contains tools which are required for development and debugging purpose. JRE contains class libraries and supporting files required for the purpose of execution of the program.

This keyword is a reference variable that refers to the currently selected object. This keyword can be used in a variety of ways in Java. It can refer to current class properties such instance methods, variables, constructors, and so forth. It can also be provided to methods and constructors as an argument. It can alternatively be returned as the current class instance from the procedure.

Layers of IoT protocol stack are: 1) Sensing and information, 2) Network connectivity, 3) Information processing layer, 4) Application layer.

Tip 1 : Be sure to do your homework on the organization and its culture before the interview.
Tip 2 : Employers want to understand how you use your time and energy to stay productive and efficient. Be sure to emphasize that you adhere to deadlines and take them seriously.
Tip 3 : Talk about a relevant incident that made you keen on the profession you are pursuing and follow up by discussing your education.