4i apps solutions Interview Questions and Answers

Method overloading is the ability to define multiple methods with the same name but different parameters.

• Method overloading allows a class to have multiple methods with the same name but different parameters.

• The methods must differ in the number, type, or order of their parameters.

• Example: void print(int a), void print(int a, int b), void print(String s)

• Method overloading is resolved at compile-time based on the number

A constructor is a special method that is used to initialize objects of a class.

• Constructors have the same name as the class they belong to.

• They are called automatically when an object is created.

• They can take parameters to set initial values for object properties.

• If a class does not have a constructor, a default constructor is provided by the compiler.

• Constructors can be overloaded to provide multiple ways of initiali

Different types of joins in SQL and their explanations

• Inner join: returns only the matching rows from both tables

• Left join: returns all rows from the left table and matching rows from the right table

• Right join: returns all rows from the right table and matching rows from the left table

• Full outer join: returns all rows from both tables, with NULL values in place of non-matching rows

• Cross join: returns the Cartesian prod