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When a new object is created in a program a constructor gets invoked corresponding to the class.The constructor is a method which has the same name as class name.If a user doesn’t create a constructor implicitly a default constructor will be created.The constructor can be overloaded.If the user created a constructor with a parameter then he should create another constructor explicitly without a parameter. See More

Local variables are defined in the method and scope of the variables that have existed inside the method itself.An instance variable is defined inside the class and outside the method and scope of the variables exist throughout the class. See More

The main method in Java is not an extraterrestrial method. Apart from the fact that main() is like any other method and can be overloaded in a similar way, JVM always looks for the method signature to start the program. See More

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Java does not use pointers because they are unsafe and increases the complexity of the program. Since Java is known for its simplicity of code, adding the term of pointers contradicts. Because JVM is responsible for implicit memory allocation, pointers in Java are discouraged to avoid direct access to memory by the user.See More

Quality Assurance: Quality Assurance involves process-oriented activities. It ensures avoiding errors in the process used to make Software application. So the defects do not arise when the software application is developed.Quality control: quality control involves product-oriented activities. It runs the program or code to identify the flaws in the software application.See More