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

TCS,

2 7406

What is meant by wrapper classes?

 3 7815

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

 2 25995

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

Wipro,

7 9313

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 3152

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

 1 3157

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

 4 5030

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

 2 3753

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).

 1520

Is there memory leaks in java?

 3 4670

Need to use public,static keywords in main function?

5 5669

How core java/j2ee project performance can be measured ?

 1 3127

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 6265

How Marker Interfaces are instruct to complete the desired need ?

 2 3259

Matrix multiplication only using OOP concepts .

 3486

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Un-Answered Questions { Core Java }

Is it possible to use Semaphore/ Mutex in an Interrupt Handler?

513

Which package has light weight components in java programming?

654

What is a generic data type?

558

What is operator overloading. Is it is supported in java?

507

Make a data structure and implement an algorithm to print all the files in a directory. (The root directory can have sub-directories too.)

830




How java is similar to c?

574

Can a class have multiple superclasses?

551

How can we avoid including a header more than once?

594

What’s the difference between unit, integration and functional testing?

602

Why do we create public static method in java?

567

What are advantages of exception handling in java?

567

What does provide mean construction?

540

What is var keyword ?

726

What is the difference between I ++ and ++ I in java?

496

What is Garbage Collection in Java

599

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