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

Core Java Interview Questions

Questions Answers Views Company eMail

abstract class Demo { public void show() { System.out.println("Hello I am In show method of Abstract class"); } } class Sample extends Demo { public void show() { super.show(); System.out.println("Hello I am In Sample "); } } public class Test { public static void main(String[] args) { //I WANT TO CALL THE METHOD OF BASE CLASS IT IS POSSIBLE OR NOT CAN WE USE SCOPE RESOLUTION OPERATOR TO CALL OR JAVA NOT SUPPORTED THAT :: OPERATORE } }

3 14013

java is puerly object oriented or not ?

5 6834

i need income tax program using java inheritance concept. could u please help me?

2 5008

difference between byte stream class and character stream class?

4557

why should we get the following error ? Exception in main method NoClassDefFoundError:classname could anyone give the detail clarification on how java compiler can look for .class file?

2 4024

i need source code for income tax program using java inheritance

1 5039

What are the notations in Java?

Cap Gemini,

1 8852

What are library required to connect to excel sheet.

Cap Gemini,

2 6207

What is “try and catch” in java

Cap Gemini, TCS,

5 8602

Scenario: There are 1 to 100 numbers. Each number should be keep in the each column like from A column to Z column ie 1 to 26. From 27 to 52 should be in 2nd row in the excel sheet. This has to be continue till 100. How do you write Java program and what are various methods.

Cap Gemini,

4 8022

public class Base { public void myMethod(int a,intb) {} } // Uses myMethod and then hides it. public class DerivedOne extends Base { private void myMethod(int a,int b); } will this compile or not .yes or no. why

2 4518

how to crate clint-server socket?

Accenture, Infosys, Infotech, TCS,

1 5043

how an we achive multiple inhetitance in java using interface..??

2 4954

how to connect two diffrent applet files

3012

I need help please send me reply: Write a program "if given a string like 'HAT', the combination's returned should be like ATH,THA,TAH in java"?

4 5905

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Un-Answered Questions { Core Java }

Is treeset sorted in java?

988

Can we have a try block without catch block?

985

How would you use Bubble Sort to sort the number of elements?

1006

what is nested class in java?

1174

Explain about exception propagation?

1034

What is better- service oriented or batch oriented solutions?

2220

What does t in java mean?

998

Explain yield() method in thread class ?

1063

What is the exception hierarchy in java?

964

what is the use of pojo (plain old java objects)? how it is interact with crystal reports? pls urgent

2180

what is the difference between future and callable interface in java?

1234

What is the super void?

902

Is Constructor possible in abstract class in java ?

1067

How can u increase the heap size in the memory?

1020

What is the difference between logical data independence and physical data independence?

1038

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