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 13859

java is puerly object oriented or not ?

5 6639

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

2 4914

difference between byte stream class and character stream class?

4496

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 3909

i need source code for income tax program using java inheritance

1 4933

What are the notations in Java?

Cap Gemini,

1 8762

What are library required to connect to excel sheet.

Cap Gemini,

2 6080

What is “try and catch” in java

Cap Gemini, TCS,

5 8358

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 7861

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 4430

how to crate clint-server socket?

Accenture, Infosys, Infotech, TCS,

1 4969

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

2 4843

how to connect two diffrent applet files

2945

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 5705

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Un-Answered Questions { Core Java }

If two threads have same priority which thread will be executed first ?

1425

What are static blocks and static initalizers in java ?

1027

What is pass by value?

902

What is the difference between an object-oriented programming language and object-based programming language?

954

What is identifier with example?

1006

What class allows you to read objects directly from a stream in java programming?

1001

Can we use catch statement for checked exceptions when there is no chance of raising exception in our code?

987

What is anagram of a string?

899

What types of index data structures can you have in java?

1143

How is abstraction implemented in java ?

923

How do you use compareto method?

957

Can an integer be a string?

992

How do you add an arraylist to an array in java?

938

What is the difference between variable declaration and variable initialization?

987

What is nested interface?

966

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