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

Core Java Interview Questions

Questions Answers Views Company eMail

Where and how can you use a private constructor?

1003

What happens if an exception is not handled in a program?

1111

What is the difference between the size and capacity of a vector?

1047

Why deletion in linkedlist is fast than arraylist?

1108

What is the difference between a constructor and a method?

1266

When arithmeticexception is thrown?

1039

What’s meant by anonymous class?

1092

What are runtime exceptions?

1166

Which number is denoted by leading 0x or 0x in java?

1053

What is the default value of an object reference declared as an instance variable?

1131

If a variable is declared as private, where may the variable be accessed?

1067

Why do we need wrapper classes?

1077

What is the range of the short type?

1023

What is hashmap and map?

1035

When is the arraystoreexception thrown?

1031

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Un-Answered Questions { Core Java }

Is it possible to compare various strings with the help of == operator? What are the risks involved?

1077

What is continuity of a function?

1098

What is the equal sign?

1132

What is try-with-resources in java?

1178

how can you catch multiple exceptions in java?

1022

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

1061

How does arraylist work in java?

1130

What are the 3 types of loops in java?

1093

What is string builder?

902

Explain list interface?

969

What is a constructor, constructor overloading in java?

1002

When is the arraystoreexception thrown?

1031

What is the difference between jvm and jre? What is an interface?

1101

Can we use static class instead of singleton?

1057

how to one war file class to another war file class?

2079

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