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 externalizable?

1066

What happens to a static var that is defined within a method of a class?

1033

What modifiers are allowed for methods in an interface?

1164

Why is an interface be able to extend more than one interface but a class can’t extend more than one class?

1170

Which non-unicode letter characters may be used as the first character of an identifier?

1007

Why does java not support operator overloading?

1145

I want to print “hello” even before main is executed. How will you acheive that?

1097

What is an abstract class and what is it’s purpose?

963

Class c implements interface I containing method m1 and m2 declarations. Class c has provided implementation for method m2. Can I create an object of class c?

1618

Can an interface be final?

1032

What is use of a abstract variable?

991

Can a class be declared as static?

1171

What is the difference between an if statement and a switch statement?

1166

Can we define private and protected modifiers for variables in interfaces?

1088

What is a pointer and does java support pointers?

1014

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Un-Answered Questions { Core Java }

What is the exact difference in between unicast and multicast object? Where we will use?

999

Are arrays immutable in java?

1093

Explain about arraylist?

1106

Explain the purpose of garbage collection in Java?

1033

How do you do exponents in java?

1062

How do you access command-line arguments within the code?

1063

What is data type in java?

908

What is functional interface in java?

1053

What is hash table in java?

1028

Which is dependent variable?

905

Why java is object oriented?

1039

What is immutable state?

1030

Is sizeof a preprocessor?

1006

What are format specifiers in java?

1068

What is type inference in java8?

1052

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