Java J2EE Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

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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,

1099

Define "Access specifiers" in java.

HCL,

1163

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

Axtria, ITC Indian Tobacco Company,

1056

What are abstract classes and anonymous classes?

Flextronics, Thomson Reuters, Virtusa,

1071

Explain the differences between static and dynamic variables?

Fidelity,

1142

How would you dynamically allocate memory to an array?

Atos Origin,

1036

What is the difference between Array and Hash Table?

Impetus,

1024

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

Aspiring Minds,

982

What are the concepts of 'OOPS'?

Atos Origin,

1066

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

Ericsson,

1073

What will happen when using pass by reference in java?

HCL,

985

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

Infosys,

972

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,

1051

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

Flextronics, Hexaware,

994

Un-Answered Questions { Java J2EE }

What do you mean by synchronized non access modifier?

988

Should database connections be singleton?

955

If a class is declared without any access modifiers, where may the class be accessed in java programming?

1209

Which is faster jdbc or odbc?

903

How many characters is 2 bytes?

984

Can we use different return types for methods when overridden?

989

What is the return type of execute, executequery and executeupdate?

1106

What is the use of viewresolver in spring?

472

Do you know what is the function of managedconnection.addconnectioneventlistener() in web logic server?

1044

Explain the concept of aop.

815

What is purpose of execandwait interceptor?

1085

What is the difference between a static and a non-static inner class in java programming?

1064

How to get current date in hibernate query?

429

How many types of jdbc drivers are there?

994

What is final method?

1063

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