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

Core Java Interview Questions

Questions Answers Views Company eMail

wht is mean by dirty read?

1 8601

what is the difference between Java Command Line and C command Line?

2 9748

In Inheritence concept, i have a static method in super class and i am inheriting that class to one sub class.in that case the static method is inherited to sub class or not????

Accenture,

12 18055

Q1.A. Write note on “The class path Environment Variable”? B. Which are different kinds of source code? Q2.A. How to create an interface? B. Why convert an applet to an application? Q3.A. How to use Media tracker Class. B. How to use string tokenizer class. Q4 A. Explain the overview of UDP messaging. B. Difference between SQL Exception class and SQL Warning class. Q5. A. How to create com object in Java? B. Write short notes on “The properties class” Q6. A. When object is created and destroyed? B. Explain the JDB in depth & command line. C. Write short notes on Web Sites.

iGate, Seed Infotech,

3 8661

what are the oops concept in java explain with real time examples

Accenture, Bosch, Consummate Technologies, CTS, Current Technologies, iNautix, Infosys, Kekran Mekran, QA InfoTech, RTRT, SofTech, Tech Mahindra, Thorogood, Timios, Wipro,

24 200748

what is difference between Exception and Error?

36 96601

what is difference between colection and collections?

Amdocs, IBM, Infosys, Ipog Software, Polaris, Tech Mahindra,

25 72720

Why we can not force Garbage Collection?

7 15219

I have a class which is abstract which contains only the abstract methods. This is similar to an interface. Then, if i have given a choice to choose one of them. Which one i have to choose and why?

4 7585

How multipleInheritance is possible in java?

Satyam,

18 23796

explain me with a code snippet about the generation and handling of null point exceptions.

1 4610

We have two methods to create methods the threads. 1. Implementing runnable interface 2. Extending to thread class and overriding run method. Among these two which one is better and why? Please explain me in detail.

2 6413

When we can access the static data member without creating the object what is the need of the object in java.

Airhub, ssinformatics,

5 9490

whst is encapsulation?when u encpsulate actually while devoloping code?

Amdocs, MGL,

7 9960

what is the messsage u r going to get from an objectoriented programing?

MGL,

1 2159

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Un-Answered Questions { Core Java }

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

1071

Is minecraft 1.15 out?

1024

What are the differences between heap and stack memory in java?

1112

explain different ways of using thread? : Java thread

1068

How to create a base64 decoder in java8?

1119

What is a classloader in java?

1072

What is an object in java and how is it created?

1110

Differentiate between static and non-static methods in java.

1106

What do you mean by an interface in java?

1084

What is parsing in java?

1022

Explain public static void main(string args[]) in java.

1053

What is java string pool?

1068

Realized?

2239

Write a program to find the whether a number is an Armstrong number or not?

1085

Write a java program to find the route that connects between Red and Green Cells. General Rules for traversal 1. You can traverse from one cell to another vertically, horizontally or diagonally. 2. You cannot traverse through Black cells. 3. There should be only one Red and Green cell and at least one of each should be present. Otherwise the array is invalid. 4. You cannot revisit a cell that you have already traversed. 5. The maze need not be in the same as given in the above example

2649

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