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Core Java Interview Questions
Questions Answers Views Company eMail

whether java is fully object oriented language or partially object oriented language

Infosys, ME, SMK,

4 7105

while creating thread why we extend thread class

 2 4108

How HashMap implemented in java? how it internally works when values are added or searched from hashMap?What is the difference betweenthe implementation of hashmap and Linked Hashmap?

IBM,

3 9285

what is mean by synchronization?

BOB Technologies, GCPL,

3 5128

what is mean by thread lock?

Infosys, TCS,

2 5533

I declared main() method as private. But it still running and displaying the output. Please Answer it . Code Snippet as Below: import java.io.*; class over { private static void main(String[] args) { int high = Integer.MAX_VALUE; int overflow = high + 1; int low = Integer.MIN_VALUE; int underflow = low - 1; System.out.println(high + "\n" +overflow +"\n"+ low +"\n"+underflow); //System.out.println(overflow); //System.out.println(low); //System.out.println(underflow); } }

Cap Gemini,

4 5686

Hi Every One I Have Small Doubt Please answer This???????????????????????????? I Want to use AbstractList class methods(java.util.AbstractList) My Program is import java.util.*; class DemoOne extends AbstractList { public static void main(String[] args) { AbstractList a=new DemoOne();//This One is Correct?? DemoOne a1=new DemoOne();//This One is Correct?? Both Are Not Working System.out.println("Hello World!"+a); System.out.println("Hello World!"+a1); } } Error IS: DemoOne.java:2: DemoOne is not abstract and does not override abstract method get(int) in java.util.AbstractList class DemoOne extends AbstractList AnyOne can Please Provide The Solution????????????????????????? Plzzzzzzz

 3 3746

how system.out.println() works?

 2 4226

In Inheritance if we are implementing Multi level inheritance and all class having same name of variable and now i want to access each class variable and how it is possible?

 2 4133

What is the alternate of 'Inheritance' ?

CybAge, HCL,

4 12557

explain how many oops concepts available in java with realtime scenarios?

TCS,

1 13478

int a=1,b=10; System.out.println(a+b--);

HCL,

12 13725

1) Find the Merge point of two linked lists. 2) Swap two bits of integer. 3) Reverse individual words of the sentence. 4) Reverse string without using temp string.

HCL,

2 5614

what is object slice?

 1566

why did you choose your career in IT?

LIC,

1 2553

Post New Core Java Questions

Un-Answered Questions { Core Java }

What is a nested class?

580

What is the difference between heap and stack memory?

537

You're given a Boolean 2D matrix, can you find the number of islands?

589

What is a classloader in java?

530

Difference between Linked list and Queue?

597




What do you understand by final value?

580

What is the main function in java?

521

What is empty string literal in java?

553

What is hashing in java?

556

What is string and its types?

602

What is generic type?

560

What are the 6 mandatory procedures for iso 9001?

521

What is the purpose of interface?

569

Where is the find and replace?

524

How to provide security in java

1797

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