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

Core Java Interview Questions

Questions Answers Views Company eMail

What is an empty class? What functionality does it offer in Java?

Deloitte, EXL, JPMorgan Chase,

1354

Give any two differences between C++ and java.

GrapeCity,

1208

What do you mean by Hash Map and Hash Table?

Atos Origin,

1147

Why is String immutable?

Atos Origin,

1121

What is a local block?

Global Logic,

1196

What do you mean by exception handling in Java?

Atos Origin,

1373

What are dot operator queries?

Atos Origin,

1157

What are annotations in java?

Impetus,

1139

What is the use of a copy constructor?

Flextronics,

1043

How we can declare a static variable?

HCL,

1153

Write a function to print Fibonacci series and Tribonacci series?

Hexaware,

1225

How we create object in copy constructor?

HCL,

1173

Do we need to manually write Copy Constructor?

HCL,

1092

Why declare Main() inside the class in java ?

HCL,

1123

What is the use of using enum to declare a constant?

Fidelity,

1086

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Un-Answered Questions { Core Java }

Can a method be overloaded based on different return type but same argument type?

1020

What is the use of :: in java?

1087

If a method is declared as protected, where may the method be accessed?

1073

What are the restrictions imposed on method overriding?

1067

Which sorting is best in java?

1044

What is sortedset in java?

1079

How will you compute size of a structure?

1277

what is heap memory?

1165

Can static methods be inherited?

1106

How would overload a function based on return type?

1040

When should you make a function static?

1036

Write a program to find maximum and minimum number in array?

1051

How does a for loop work java?

1100

What is the difference between static class and normal class?

1090

How do you use compareto in java?

1020

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