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

Core Java (6529)
Advanced Java (552)
Swing (223)
EJB (402)

Servlets (804)
Struts (701)
JDBC (771)
JMS (324)

SunOne (10)
J2EE (485)
Weblogic (694)
Websphere (573)

Java J2EE Interview Questions

Questions Answers Views Company eMail

What is the difference between Error, defect,fault, failure and mistake?

HCL,

1205

What are assertions in java?

Impetus,

1 2154

How are java objects passed to a method and what are native methods?

Genpact,

1082

What is scope & storage allocation of global and extern variables? Explain with an example

IBS,

1042

Explain with example the concept of constant variable in java.

HCL,

1181

what is the purpose of "virtual"?

EDS,

1086

What is the reason behind using constructors and destructors?

HCL,

1065

Detail discussions on JVM, memory management and garbage collector.

Expedia,

985

How can we make a class virtual?

Fidelity,

1116

What are the basic concepts of OOPS in java?

Axtria, ITC Indian Tobacco Company,

1036

What is garbage collection? Can it be forced to run?

Global Logic,

1010

Give differences between Quicksort & Mergesort. When should these sorts be used and what is their running time?

Genpact,

1069

Write a function for palindrome and factorial and explain?

Honeywell, Huawei, Zomato,

1077

What is the use of a conditional inclusion statement in Java ?

Global Logic,

1095

Why main function is static?

MCN Solutions,

1248

Un-Answered Questions { Java J2EE }

Is a class a subclass of itself?

1224

Explain about local interfaces.

1060

What is gridlayout in java?

885

Where and how can you use a private constructor?

995

How hashmap works in java?

1046

State the difference between strings and arrays.

1248

Explain hashset and its features?

1153

What is the difference between @autowired and @bean?

441

Explain how can you debug the Java code?

1072

What is array length in java?

964

What is the role of class.forname while loading drivers?

1009

What is module in oop?

1016

Highest level event class of the event-delegation model?

4015

When is the servlet instance created in the life cycle of servlet? What is the importance of configuring a servlet?

1062

What is spring and struts in java?

987

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