Mindteck Interview Questions, Process, and Tips

Program to merge two arrays of strings.

• Create a new array with size equal to sum of sizes of both arrays.

• Copy elements of first array to new array.

• Copy elements of second array to new array starting from the end of first array.

• Return the new array.

Constructor is a special method used to initialize objects. There are default, parameterized and copy constructors.

• Default constructor is used to create an object with default values.

• Parameterized constructor is used to create an object with user-defined values.

• Copy constructor is used to create a new object as a copy of an existing object.

• Constructors can be overloaded to have multiple constructors with different para...read more

Inheritance is a way to create a new class from an existing class. Polymorphism allows objects of different classes to be treated as if they were of the same class.

• Inheritance allows a subclass to inherit properties and methods from a superclass.

• Polymorphism allows objects of different classes to be treated as if they were of the same class.

• Example of inheritance: class Car extends Vehicle. Car inherits properties and ...read more

Typecasting is converting one data type to another. Downcasting is casting a superclass to a subclass.

• Typecasting is done using (datatype) variable syntax.

• Downcasting requires explicit casting using subclass type.

• Typecasting can result in loss of data or precision.

• Downcasting can result in ClassCastException if the object is not an instance of the subclass.