Core Java Interview Questions
Questions Answers Views Company eMail

How to count occurrences of each duplicate element in a list {a,b,d,c,a,b} ? Thanks in Advance

TCS,

2 7455

What is meant by wrapper classes?

3 7864

how to get the max salary and name of employee from arraylist without using the Comperator or even Comparable interface?

2 26062

how can i take the inputs from users in java program?

Wipro,

7 9396

HOW TO PRINT A NO IN WORDS USING WHILE LOOP THE NO WILL BE PRINTED WHEN IT WILL BE IN THE RANGE BETWEEN 1 AND 3?

1 3188

hoe can u call a constructor of a private classs to other inherited claa??

1 3188

how can be object class inherited to all class in a program when java does not support multiple inheritance??

4 5099

can two class in a code be public??if yes then how??

2 3789

take an array with -ve and +ve value both.find out the nearest value of 0(zero).if two values are same like(-2 and +2)then extract +2 is nearest of 0(zero).

1535

Is there memory leaks in java?

3 4723

Need to use public,static keywords in main function?

5 5726

How core java/j2ee project performance can be measured ?

1 3155

If there are two notepad opened and working on it . is this a process or thread? computer based Live Example to differentiate between Thread , Process , and Multi tasking ?

TCS, Wipro,

3 6340

How Marker Interfaces are instruct to complete the desired need ?

2 3300

Matrix multiplication only using OOP concepts .

3506


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Un-Answered Questions { Core Java }

You're given a Boolean 2D matrix, can you find the number of islands?

604


What are synchronized methods and synchronized statements in java programming?

581


What are the two ways of implementing multi-threading in java?

827


What is the importance of main method in Java?

579


What is meant by binding in rmi?

556






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?

1944


Can you explain inner class.

598


Explain the features of java?

597


What is the difference between static and non-static variables in java programming?

525


Are generics important java?

532


What occurs when an object is constructed?

577


Why is sizeof not a function?

555


Is singleton thread safe in java?

553


What is formatted output in java?

506


How to display all the prime numbers between 1 and 100

509