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Core Java Interview Questions
Questions Answers Views Company eMail

what is use of marker interface? give me good example?

 2 5304

what is use of threads how many ways to create thread

iTrust, Verizon,

3 9581

Program to print 1 1 2 1 2 3 1 2 3 4 like that

Huawei,

8 11932

program to find 25 square = 625 here the 625 of last two digits is equal to 25, i don't know excatly what this type of number is called

Huawei,

1 3733

i need to know the website that i can compile and run a java code in online.(while system doesn't contain any jdk and jre)

 1666

What is JAVA? Why it is platform independent?

NIIT,

10 11988

i need to know the site which compiles and run the java program completely in online... thank you for your reply in advance

 2 3282

what questions are been asked ??? for interview in apti

 1708

Features of JAVA ? In which version of java synchronizedXXX() methods are included in Collections class.

NIIT,

1 6192

all are saying java doesn't support multiple inheritance but by default Object class is super class for all the user defined classes and we can extend atmost one class so each class can extend more than one class so java supports multiple inheritance?i am confused with this,pls any one explain me.

 4 6445

all are saying java doesn't support multiple inheritance but by default Object class is super class for all the user defined classes and we can extend atmost one class so each class can extend more than one class so java supports multiple inheritance?i am confused with this,pls any one explain me.

CFG,

8 7221

what is class.forname() and how it will be useful ?

 3 4879

how and when compiler knows that the Java code throws the checked Exception.

HSBC,

2 11651

diff. b/w JAVA and javascript...

NIIT,

3 5777

what is the difference between String s="hello"; and String s=new String("hello");?

 3 12613

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Un-Answered Questions { Core Java }

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

646

What is the size of boolean variable?

646

How many bytes are there?

607

What is meant by memory leak?

597

Difference between throw and throws?

699




What is class variable java?

642

How does a cookie work in Servlets?

435

What is a string what operation can be performed out with the help of a string?

569

Can I use % with real numbers?

630

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

609

What is object of class in java?

678

Can we pass a primitive type by reference in java? How

593

FOR EXAMPLE WE R HAVING TWO LIST ELEMENTS ..BOTH LISTS CONTAINS ID,NAME,PLACE ..I NEED TO COMPARE BOTH IDS IN TWO LISTS,IF ID'S R SAME MEANS WE HAVE ADD THE DETAILS(LIKE NAME,PLACE) TO MAP...HOW IS POSSIBLE ?CAN ANY ONE SUGGEST?

2733

What is the major difference between linkedlist and arraylist?

568

How does sublist works in java?

602

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