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

Core Java Interview Questions

Questions Answers Views Company eMail

Explain Public static void main?

IBM, Vetech,

2 19753

What is file class and what is its purpose?

1 4163

what is Remote Reference Layer ?

1 5275

What is static binding and where it occurs?

4 9882

Can a Byte object be cast to a double value?

KO,

3 16017

Can a double value be cast to a byte?

3 11061

Can a for statement loop indefinitely?

3 9815

what is the form of storage space in java?

5 9000

What are the latest versions in JAVA related areas?

Netcraft,

3 8036

What is the minimum and maximum length of an identifier?

TCS,

6 16727

What class is used to implement a Throwable array?

3 7269

What is the default initialized value of String type variable?

4 7322

What is the default initialized value of a boolean type variable?

3 5541

When garbage collector invokes object?s finalize() method?

5 7848

How Applets & Servlets will communicate with each other?

2 7416

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Un-Answered Questions { Core Java }

What is java util function?

1004

What is replaceall in java?

977

How do you remove spaces in java?

981

Distinguish between a predicate and a function?

944

What is the java virtual machine?

1023

What is meant by collection in java?

1010

Implement 2 stacks with just 1 array. The stack routines must not indicate overflow unless every slot in array is used.

1250

What is abstract class? Explain

981

What are instance variables?

1039

Difference between character constant and string constant in java ?

962

What is the difference between checked exception and unchecked exception?

965

Explain the JDB in depth & command line.

963

Can we inherit inner class?

961

What is string array?

1019

What’s the difference between unit, integration and functional testing?

1052

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