Java Programming and Technical

Q. What are different types of access modifiers?

A. public: Any thing declared as public can be accessed from anywhere. private: Any thing declared as private can't be seen outside of its class. protected: Any thing declared as protected can be accessed by classes in the same package and sub classes in the other packages. default modifier : Can be accessed only to classes in the same package.

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Java Other Question

Q. What is HashMap and Map?

A. Map is Interface and Hashmap is class that implements that.
Q. What is servlet?

A. Servlets are modules that extend request/response-oriented servers, such as java-enabled web servers. For example, a servlet might be responsible for taking data in an HTML order-entry form and applying the business logic used to update a company's order database.