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

Core Java Interview Questions

Questions Answers Views Company eMail

Define jre i.e. Java runtime environment?

1029

What are the two ways in which thread can be created?

1065

Is break statement can be used as labels in java?

982

Why is string class considered immutable?

1071

How java enabled high performance?

1068

What is nullpointerexception?

1091

Does it matter in what order catch statements for filenotfoundexception and ioexception are written?

973

What is the purpose of file class?

1047

What do you mean by checked exceptions?

976

Explain runtime exceptions?

1194

When abstract methods are used?

1 1580

What is the difference between object oriented programming language and object based programming language?

1035

When throws keyword is used?

1014

What are the ways in which a thread can enter the waiting state?

959

What is a class variable?

1065

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Un-Answered Questions { Core Java }

What is the advantage of preparedstatement over statement?

1126

What is the difference between stringbuffer and stringbuilder?

1071

What are the types of collections in java?

1064

Does isempty check for null?

1036

what is the difference between process and thread? : Java thread

1006

Is java ee a framework?

1001

What are loops in java? What are three types of loops?

1042

What is the purpose of a default constructor?

1109

Why are lists ordered in java?

1027

What is the size of arraylist in java?

1039

Whats the difference between notify() and notifyall()?

1055

Does java allow overriding static methods ?

1132

What is a subsequence of a string?

1082

What is a modifier?

1536

What is anti pattern in java?

986

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