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Java J2EE Interview Questions
Questions Answers Views Company eMail

What is the benefit of using enum to declare a constant?

Aspire, Infogain,

1103

Define "Access specifiers" in java.

HCL,

1170

What are the different approaches to implement a function to generate a random number?

Axtria, ITC Indian Tobacco Company,

1059

What are abstract classes and anonymous classes?

Flextronics, Thomson Reuters, Virtusa,

1075

Explain the differences between static and dynamic variables?

Fidelity,

1150

How would you dynamically allocate memory to an array?

Atos Origin,

1040

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

Un-Answered Questions { Java J2EE }

Which is better arraylist or vector?

1021

Explain about collection interface in java?

991

Is java a tool?

918

What are the different methods involved in generic servlet?

1094

Why java is said to be pass-by-value ?

1043

What is the flow of spring boot? : Spring Boot

454

What are untrusted applets?

1145

Is kafka a jms?

830

Explain the differences between static and dynamic variables?

1150

In how many ways duplicate form submission can occurs?

986

Is jdbc open source?

862

How to compare strings in java?

1013

What are the components of session beam?

1075

Does windows 10 need java?

1047

What is a final class ?

1181

For More Un-Answered { Java J2EE } Questions Click Here