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Core Java Interview Questions
Questions Answers Views Company eMail

what are the disadvantages of indexes in oracle?

3i Infotech, Wells Fargo,

1863

How we get some middle records in one table?

3i Infotech,

2 5428

tell me some common

TCS,

2 3557

Which is the best way of exception handling?

Oracle,

2 5922

what is the difference between System.exit() and System.exit(1)?

eClinical Solutions, eClinical Works, eClinicalWorks,

1 6343

Can there be an abstract class with no abstract methods in it?

 1 3163

can any one send me the example program of immutable class?

Arfin, TCS,

2 4335

There are 100 keys and values in HashMap.how to get the keys and values?

IBS,

1 5758

what is the diffrences between platform independent and portable

TCS,

5 21329

Java support call by reference (pass by reference) ?

HCL,

1 3830

System.out & System.in are final static data member of System class but we can change there reference through setOut() & setIn() method how...

FCS, TCS,

2 5021

difference between vectorlist and hash

TCS,

1 3550

why HashTable not allow null key and value

Crimson Logic,

2 21289

why string constant pool in java

TCS,

2 7940

why top level class could not be static

L&T,

3 11654

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Un-Answered Questions { Core Java }

Is math class static in java?

607

How are this() and super() used with constructors in java programming?

566

Why is it called a string?

561

What is the importance of hashcode() and equals() methods?

576

Can inner class extend any class?

596




Is there a sort function in java?

575

How do you use wildcards?

528

Explain reverse a linked list iterative solution in java?

496

What a static class can contains?

694

What is exception in java?

563

Is age discrete or continuous?

684

How many bytes is a char in java?

524

Does importing a package imports its sub-packages as well in java?

552

What class of exceptions are generated by the java run-time system?

628

Is it possible to write a regular expression to check if string is a number?

538

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