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Core Java Interview Questions
Questions Answers Views Company eMail

What collections you have worked on? Internal working of Hashmap?

Bravura Solutions,

1402

What design pattern you have used in your project? I answered Factory pattern, how it is implemented? What are its advantage? Do know about Abstract Factory?

Bravura Solutions,

1476

Can static methods be overridden?

Bravura Solutions,

5 6276

java Api provided try catch finally ,try catch(its ok) but why try finally and exception occured at try then how the flow is?

Naaptol,

1 3296

Why java does not supports multiple inheritance?

TCS, VSoft,

3 3620

what is associative array

Tech Mentro,

1 1883

what is the difference between static class and singleton class? can we create static class?

L&T, Octazen, Vamsi Labs,

2 3522

ublic class Java_Coding_Samples { public static void JavaHungr(NumberFormatException ae){ System.out.println("integer"); } public static void JavaHungry(Exception e){ System.out.println("string"); } public static void JavaHungry(ArithmeticException ae){ System.out.println("object"); } public static void main(String[] args) { JavaHungry(null); }

1 1407

what is ABSTRACTION and what are using in real time project?

iGate,

1 2346

For technical interview question please sir send me because tomorrow my interview

FactSet Systems,

1 3304

How to define a constant variable in Java?

TCS,

1 1733

java is pure object-oriented programming language?why it is platform independent.

1 1453

Why should we use java?

IBM,

1 1680

How many Java environments are there?

Phantom Technologies,

1 1472

What is Java Classloader?

Phantom Technologies,

1 1475


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Un-Answered Questions { Core Java }

Is it necessary that each try block must be followed by a catch block?

145


Explain with example the concept of constant variable in java.

192


What is return in java?

117


Make a data structure and implement an algorithm to print all the files in a directory. (The root directory can have sub-directories too.)

271


Is int a class in java?

100






What do you mean by a JVM?

145


Write a program to find the greatest of three numbers in java?

136


How do you sort in ascending order in java?

109


Is java code slower than native code?

138


When should I use singleton?

122


Why null value is used in string?

115


explain what is transient variable in java?

160


How does hashmap work in java ?

120


What is the output of the below java program?

133


What is byte code and why is it important to java’s use for internet programming?

160