Etg Global Services Interview Questions and Answers

I am a software trainee with knowledge in linked list and array list.

• I have experience in implementing linked lists and array lists in various programming languages.

• Linked lists are dynamic data structures while array lists are static data structures.

• Linked lists are efficient for insertion and deletion operations while array lists are efficient for random access.

• Examples of programming languages that support linked li

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 of the class is created.

• They can be used to set default values for object properties.

• Constructors can be overloaded to accept different parameters.

• Example: public class Car { public Car() { // constructor code here } }

Java does not support multiple inheritance, but it can be achieved using interfaces.

• Java supports multiple interface inheritance

• A class can implement multiple interfaces

• Interfaces can extend other interfaces

• Example: class A implements interface B and C

• Example: interface B extends interface D and E

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 be used to set initial values for object properties.

• Constructors can be overloaded to accept different parameters.

• Example: public class Car { public Car() { // constructor code here } }

Multiple inheritance cannot be achieved directly in Java, but it can be simulated using interfaces or abstract classes.

• Java does not support multiple inheritance of classes

• Multiple inheritance can be achieved using interfaces or abstract classes

• Interfaces allow a class to inherit from multiple interfaces

• Abstract classes can provide partial implementation and can be extended by a single class