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

Core Java Interview Questions

Questions Answers Views Company eMail

There can be a abstract class without abstract methods, but what is the need to declare a class abstract if it doesn't contain abstract methods?

HCL,

5 8981

I was asked to draw the class diagram for the below scenario which should obey OOPS concept. A Portal is to be developed for a school , which has 3 main divisions viz , Education , Admin & Trust. Each division has 2 sub divisions Kinder Garden & Higer Secondary.

Amtek, Huawei,

3 12581

What is type casting?

2 5521

What is the java project architecture?

IBM,

2195

What Is Resource Leak?

2 5391

In which language JVM (Java Virtual Machine) is implemented

5 9061

Why we should declare the variables as static and final in interfaces?

1 5335

Can I have constructor in Interface?

2 16909

How can we create a object of a class without using new operator.

Infosys, Nokia,

1 7631

I dont want to use serialzable in java is there any another concept so plz tell me

WDC,

3 6634

explain the collection in java

WDC,

1 4455

How to implement Singleton

DELL,

6 9738

How does marker interface provides functionality to the implemented class ? or How dose maker interface gets the functionalities as serialization or cloning.

Cap Gemini,

4 8773

what is collections in java?

4 6242

how can i kill thread without stop() and destroy()

1 5310

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Un-Answered Questions { Core Java }

What are adapter classes?

997

Is null keyword in java?

893

What is super?

1065

Is upper case in java?

929

What is serialversionuid?

1021

Explain about procedural programming language or structured programming language and its features?

1039

What is jar?

1075

How does split work in java?

999

What is public static void main?

1053

What is the synonym of string?

1044

What is final keyword in java?

977

How many types of string data types are there?

1032

Does java arraylist maintain insertion order?

946

Can I uninstall java?

990

What does next mean in java?

928

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