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

Core Java Interview Questions

Questions Answers Views Company eMail

Justify your answer that you can't define a method inside another method in java, if you can then how?

1192

Differentiate between array list and vector in java.

1126

What is outofmemoryerror in java?

Cyient,

1041

What do you understand by classes in java?

1021

Why do we create public static method in java?

1125

Why we do exception handling in java and how many types of exceptions are there?

1135

What is operator overloading. Is it is supported in java?

1045

What is the difference between jdk, jre, and jvm?

1133

What is difference between equals and hashcode method?

1149

What is the purpose of final keyword and when to use it?

1012

What is difference overloading and overriding?

Cyient,

1185

What is difference between throw and throws ?

Cyient,

1152

How thread scheduler schedule the task?

1069

Explain constructors and types of constructors in java.

1121

Differentiate between stringbuffer and stringbuilder in java.

1039

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Un-Answered Questions { Core Java }

What is the difference between Java and C++?

1213

Can you create an object of an abstract class?

1037

What is difference between java and java ee?

1045

What is the use of keywords in java?

994

What is the difference between the prefix and postfix forms of the ++ operator?

1029

What is class and object in java?

1021

What happens when you invoke a thread’s interrupt method while it is sleeping or waiting?

994

What are different data types?

1037

Explain the term virtual machine?

1059

How do I remove a character from a string in java?

975

Should a main method be compulsorily declared in all java classes?

1080

What is gui programming?

1050

Why scanner is used in java?

1090

What is the most important feature of java? What is an interface?

1026

How many bytes are there?

1014

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