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 are temp tables ?

1 1033

What is database deadlock ?

1 1312

What should be done for auto generating primary key id in a table ?

1 1026

Can we have foreign key reference to a non primary key column ?

1 1042

What's the benefit for specifying constraints like not null, primary key explicitly instead of specifying it against the column ?

1 1030

If you are given a choice to implement the code to either insert a record or update if already exist, which approach will you follow ?

1 1064

What is database deadlock ? How can we avoid them?

1 1147

Describe the steps needed to execute a sql query using jdbc.

1 1038

Which constraint cannot be specified as an explicit constraint and should be specified with the column only ?

1 992

What is jdbc? Describe the steps needed to execute a sql query using jdbc.

1 998

Does sql allow null values ?

1 1038

Write an sql to find all records having all upper case alphanumeric characters in a field ?

1 1012

What are the different class loaders used by jvm?

1 1158

Describe, in general, how java's garbage collector works?

1 1092

What is threadfactory?

1 1159

Un-Answered Questions { Java J2EE }

hi actully i hav form columns with origin and destination names .as like as i need to create one more column with name amount. my requirement is when i select origin and destination columns automatically i need to get amount from database.how can i. please tel me with relative code

2848

What is an object in java and how is it created?

1110

What is a classloader in java?

1072

i want test pattern of zylog company and some examples also

2841

What is lazy class?

470

What is java string pool?

1068

What is the difference between break and continue statements?

1107

What are the differences between heap and stack memory in java?

1113

What are the contents on web.xml in struts application ?

1047

How to create a base64 decoder in java8?

1119

What is a constructor overloading in java?

1114

What is the difference between filters and interceptors ?

1273

How is declarative handling of exceptions done in struts ?

990

Explain public static void main(string args[]) in java.

1053

What is difference between @controller and @restcontroller in spring?

520

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