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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 7407

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 26001

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 3154

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 5040

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

 2 3757

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).

 1522

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 6273

How Marker Interfaces are instruct to complete the desired need ?

 2 3261

Matrix multiplication only using OOP concepts .

 3488

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Un-Answered Questions { Core Java }

Explain the purpose of garbage collection in Java?

558

How many JVMs can run on a single machine and what is the Just-In-Time(JIT) compiler?

560

What is multiple inheritance? Is it supported by java?

515

What is gc()?

565

What is thread life cycle in java?

570




In java, what is the difference between method overloading and method overriding?

570

Can a boolean be null java?

527

If goto and const is reserve words than why it is not work in java?

1489

What is a protected method?

580

Difference between serialization and deserialization in java?

639

What variables are stored in stack?

515

Is a method a procedure?

538

How do you clear an arraylist in java?

485

What about main() method in java ?

556

I want to re-reach and use an object once it has been garbage collected. How it's possible?

526

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