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

Core Java Interview Questions

Questions Answers Views Company eMail

Which keyword specify that a variable is effectively final ?

1043

Which access specifier can be used with class ?

1045

How can we run a java program without making any object?

1086

What will happen if there is a default method conflict as mentioned above and we have specified the same signature method in the base class instead of overriding in the existing class ?

1020

Explain about anonymous inner classes ?

1123

What one should take care of, while serializing the object?

955

When do you get classcastexception?

1069

Explain method local inner classes ?

1090

Difference between object instantiation and construction ?

1107

Difference between this() and super() ?

1183

What are different ways of object creation in java ?

1150

How can we create objects if we make the constructor private ?

1057

What is a final class ?

1270

Explain inner classes ?

1169

Can static method access instance variables ?

1182

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Un-Answered Questions { Core Java }

Why multiple inheritance is not supported by java?

1020

Can I use % with real numbers?

1078

Can a class be declared as static?

1217

What is keyword auto for?

1250

What is the purpose of object oriented programming?

1030

How many decimal places is a double?

1034

What is a private class in java?

1118

What is thread pool? How can we create thread pool in java?

1133

What is byte data type?

1042

What are the two main uses of volatile in Java?

1091

Is {a, n, d} a palindrome? If you are given a random string, is it a palindrome or not?

1195

When do we use hashset over treeset?

1098

How many digits can a float hold?

1064

How java is similar to c?

1087

What is ‘has a’’ relationship in java?

1275

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