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

Core Java Interview Questions

Questions Answers Views Company eMail

what are the disadvantages of indexes in oracle?

3i Infotech, Wells Fargo,

2637

How we get some middle records in one table?

3i Infotech,

2 6457

tell me some common

TCS,

2 4623

Which is the best way of exception handling?

Oracle,

2 7074

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

eClinical Solutions, eClinical Works, eClinicalWorks,

1 7279

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

1 3901

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

Arfin, TCS,

2 5391

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

IBS,

1 6563

what is the diffrences between platform independent and portable

TCS,

5 23768

Java support call by reference (pass by reference) ?

HCL,

1 4572

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 6166

difference between vectorlist and hash

TCS,

1 4309

why HashTable not allow null key and value

Crimson Logic,

2 22607

why string constant pool in java

TCS,

2 9082

why top level class could not be static

L&T,

3 13246

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Un-Answered Questions { Core Java }

In a class implementing an interface, can we change the value of any variable defined in the interface?

1144

What is locale in java?

1059

What are inbuilt functions?

1046

What are advantages of using Java?s layout managers than windowing systems?

2430

What is predicate in java?

1102

What is ternary operator?

1060

Differentiate between overriding and overloading cases?

1167

What restrictions are placed on method overriding?

1242

What is singleton class example?

1086

How many threads can I run java?

1176

What access modifiers can be used for variables?

1209

What is the difference between ArrayList and Vector? which one is better in Java

1191

What is the purpose of static keyword in java?

1009

Can a set contain duplicates?

1002

Why are variables important in research?

978

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