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 13852

java is puerly object oriented or not ?

5 6632

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

2 4910

difference between byte stream class and character stream class?

4494

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 3908

i need source code for income tax program using java inheritance

1 4929

What are the notations in Java?

Cap Gemini,

1 8760

What are library required to connect to excel sheet.

Cap Gemini,

2 6080

What is “try and catch” in java

Cap Gemini, TCS,

5 8353

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 7858

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 4427

how to crate clint-server socket?

Accenture, Infosys, Infotech, TCS,

1 4966

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

2 4843

how to connect two diffrent applet files

2944

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 5704

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Un-Answered Questions { Core Java }

What is the difference between processes and threads?

997

What is the difference between call by reference and call by pointer?

924

In how many ways we can create threads in java?

1145

What is the major drawback of internal iteration over external iteration?

973

Is linked list a linear or non-linear data structure?

924

What is anonymous inner class?

1031

What is an example of declaration?

957

What is a dot notation?

970

Garbage collection in java?

960

What’s the difference between applets and standalone program?

986

How is abstraction implemented in java ?

923

What is method with example?

1032

Differentiate between stringbuffer and stringbuilder in java.

984

Difference between stack and queue?

1024

Is void a data type in java?

929

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