Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

What is the difference between Array and Hash Table?

Impetus,

1032

What are heap memory and stack memory and what are memory tables.

Aspiring Minds,

989

What are the concepts of 'OOPS'?

Atos Origin,

1074

What is nested loop? What is dangling else condition in it?

Ericsson,

1089

What will happen when using pass by reference in java?

HCL,

990

What is a concrete classes? Is Java object class is concrete class?

Infosys,

983

Given a singly linked list, find the middle of the list in a single traversal without using temporary variable.

Fidelity,

1052

What is Gang of four design patterns

Infosys,

1052

Can a constructor be private and how are this() and super() method used with constructor?

Flextronics, Hexaware,

1004

What is a default constructor and also define copy contrucyor?

Global Logic,

1108

Why use string handling in Java?

HCL,

1030

Explain heap sort?

Flextronics,

1120

What are recursive functions? Give some examples?

Axtria, ITC Indian Tobacco Company,

1192

How do you access command-line arguments within the code?

Flextronics, Hexaware,

1059

What is the difference between static and global variables and also define what are volatile variables?

Flextronics, Hexaware,

1050

Post New Core Java Questions

Un-Answered Questions { Core Java }

What are the features in java?

1074

What do you understand by abstract classes?

1075

What methods are used to get and set the text label displayed by a button object?

1016

Can you inherit from an abstract class java?

994

What do you mean by garbage collection used in java?

1067

Explain about the security aspect of java?

967

What are the characteristics of java?

1055

Why java doesn’t support multiple inheritances?

1054

What is a native method in java programming?

1068

What is a bubble sort in java?

947

What is the maximum size of arraylist in java?

1009

What is a java object and java application?

1054

Is vector ordered in java?

995

what is synchronization and why is it important? : Java thread

1093

What are the main concepts of oops in java?

1745

For More Un-Answered { Core Java } Questions Click Here