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Core Java Interview Questions
Questions Answers Views Company eMail

What is the difference between Array and Hash Table?

Impetus,

1084

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

Aspiring Minds,

1033

What are the concepts of 'OOPS'?

Atos Origin,

1122

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

Ericsson,

1139

What will happen when using pass by reference in java?

HCL,

1045

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

Infosys,

1033

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

Fidelity,

1105

What is Gang of four design patterns

Infosys,

1117

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

Flextronics, Hexaware,

1058

What is a default constructor and also define copy contrucyor?

Global Logic,

1166

Why use string handling in Java?

HCL,

1081

Explain heap sort?

Flextronics,

1179

What are recursive functions? Give some examples?

Axtria, ITC Indian Tobacco Company,

1255

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

Flextronics, Hexaware,

1113

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

Flextronics, Hexaware,

1108


Post New Core Java Questions

Un-Answered Questions { Core Java }

Break statement can be used as labels in java?

1066


Why we use multi threading instead of multiprocessing?

1129


How do you convert an int to a string in java?

1209


What is the inheritance?

1029


Does java have extension methods?

1047


5 Coding best practices you learned in java?

1064


How infinite loop is declared?

1064


What does index mean in java?

1041


What is a top level class in java?

1093


Why is java so important?

1164


What is :: operator in java 8?

1083


What is parsing in grammar?

1093


What is the multi-catch block in java?

1108


What is abstract class constructor called?

1080


Why do we create threads in java?

1360