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

Core Java Interview Questions

Questions Answers Views Company eMail

hi to all,i have a question on static block. i saved below as test.java class test extends a { static { System.out.println("test static"); } public static void main(String []dfs) { } } class a { static { System.out.println("a static"); } public static void main(String []asdf) { } } o/p as static test static but if i change base class as test class then class test { static { System.out.println("test static"); } public static void main(String []dfs) { } } class a extends test { static { System.out.println("a static"); } public static void main(String []asdf) { } } o/p test static explain me why "a static" wasn't print in second code when it is in derived class

1 3507

what are the uses of Class class and what it returns? explain it with the example code.

1 3732

class test { private static void main(String []adsf) { } } explain me that the above code is error or exception

3 5403

class a extends b { } class b extends a { } why java doesn't support cyclic pls explain me with example

Wipro,

3 9787

how to create a jar file in java

1 5032

what is the main difference between string and stringbuffer? can you explain it with program?

2 5354

How can i add a button in applet in java ???

2 4259

did interface can implementation method ? i know its not possible but my interviewer said its possible ..but how..? any one have idea ???

IBM,

7 11050

how to make the double-tone class ? as we have singletone class..?

IBM, Microsoft,

1 5001

why constructor dont have returns type?

IBM,

9 14049

is JVM platform dependent or independent..?

IBM, Tech Mahindra,

11 40533

what is difference between interface and abstract class..?

4 6757

How to make a method thread safe without using synchronized keyword?

Persistent, Societe Generale,

8 34181

what is the collable collections in java?

Persistent,

2 12282

we have syntax like for(int var : arrayName) this syntax is to find whether a number is in the array or not.but i want to know how to find that number's location.

1992

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Un-Answered Questions { Core Java }

What restrictions are placed on method overriding?

1112

What is difference between == and === in js?

967

What is java Applet?

1044

Is map sorted in java?

1015

Is null an object in java?

984

What does pointer mean?

988

How concurrent hashmap works?

1130

What is difference between classpath and path variables in java?

1144

What is xslt in java?

941

What is the syntax and characteristics of a lambda expression?

989

what is server side caching?

2104

Write code of any action class?

959

What is java in simple terms?

958

Why are pointers not secure?

979

How many bytes is a url?

944

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