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

Core Java Interview Questions

Questions Answers Views Company eMail

What is the use of collections in java? How it is implemented in real time applications?

2 12486

1.) if we use "private" in place of "public" in public static void main()... 2.) if we use "int" in place of "void".... 3.) can we ommit "static" keyword from that statement.... 4.) also can we give the command line arguments type as int type or float,etc.(.i.e (string args[]))

1 6636

WHAT IS THE SCOPE FOR COREJAVA...? IS JAVA ONLY CORE JAVA ?

2 9613

difference between jsp and java script?

3 5661

When you declare a method as abstract method ?

HP,

2 6910

What is JVM ?

Phantom Technologies, TCS,

4 7127

Why do we need public static void main(String args[]) method in Java...?

1 5061

What is the difference between constructor and method?

4 6641

What is the difference between parameters and arguments ?

2 5346

What is the difference between Java Bean and Java Class.?

2 5325

What is the purpose of a statement block?

1 4337

Can an unreachable object become reachable again?

3 5577

String Reverse in Java...!

5 8787

what difference between throw and throws in exception handling.

5 8148

How to excute - Interface - Inner class- method can any one tell how to execute/ call this main method public interface abc { static int i=0; void dd(); class a1 { a1() { int j; System.out.println("inside"); }; public static void main(String a1[]) { System.out.println("in interfia"); } } }

1 3978

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Un-Answered Questions { Core Java }

Which package is used for pattern matching with regular expressions?

1069

What access modifiers can be used for variables?

1089

What is double checked locking in singleton?

1018

Is array primitive data type in java?

951

What is difference between iterator access and index access?

1017

What happens if a constructor is declared private?

987

What is variable length arguments in java?

928

Why do we declare a class static?

1082

Is java util list serializable?

899

Write a function for palindrome and factorial and explain?

1045

What is difference between == equals () and compareto () method?

999

Can constructor be static or final?

1053

What is classpath?

970

What’s the difference between constructors and other methods?

951

Why is sizeof not a function?

955

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