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

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 8355

What is meant by wrapper classes?

3 9093

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

2 27448

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

Wipro,

7 11433

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 3816

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

1 3849

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

4 6354

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

2 4889

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).

1982

Is there memory leaks in java?

3 5898

Need to use public,static keywords in main function?

5 7259

How core java/j2ee project performance can be measured ?

1 3846

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 7623

How Marker Interfaces are instruct to complete the desired need ?

2 4221

Matrix multiplication only using OOP concepts .

3929

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Un-Answered Questions { Core Java }

What is a boolean used for?

1115

What is the purpose of interface?

1007

What is array class in java?

1068

Can an interface have a class?

1002

What are java threads?

1134

what are the methods in object?

1150

Can we have a try block without catch block?

986

Can there be an abstract method without an abstract class?

954

Can a class have an interface?

991

what do you mean by marker interface in java?

983

What are the types of relation?

1045

If a method is declared as protected, where may the method be accessed?

1016

What is included in core java?

1058

Explain heap sort?

1123

How arrays are stored in memory in java?

980

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