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 7131

while creating thread why we extend thread class

2 4120

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 9316

what is mean by synchronization?

BOB Technologies, GCPL,

3 5162

what is mean by thread lock?

Infosys, TCS,

2 5546

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 5711

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 3766

how system.out.println() works?

2 4239

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 4149

What is the alternate of 'Inheritance' ?

CybAge, HCL,

4 12581

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

TCS,

1 13496

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

HCL,

12 13762

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 5628

what is object slice?

1573

why did you choose your career in IT?

LIC,

1 2585


Post New Core Java Questions

Un-Answered Questions { Core Java }

Is main an identifier?

546


Is {a, n, d} a palindrome? If you are given a random string, is it a palindrome or not?

617


Can a class have more than one object?

524


How many types of voids are there?

535


Differece between class and generic class?

564






What is a nested structure?

532


Is 0 an even number?

546


enlist some features of jdk.

554


Can we use catch statement for checked exceptions?

508


How do you reverse sort in java?

500


What is meant by inheritance and what are its advantages?

576


What is the final access modifier in java?

612


What are the differences between graph and tree?

643


Write a program to print count of empty strings in java 8?

534


How is java created?

532