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

Core Java Interview Questions

Questions Answers Views Company eMail

whays is mean by inner class?

HCL, IBM, TCS,

4 8278

class A{ class B{ } } in which name u save the file,its the program compile?

HCL,

6 9288

class A { class B { psvm(String args[]) { } } } if the prg saved in A.java whats the o/p?

HCL, TCS,

7 13185

wahts is mean by thread?

HCL, TCS,

22 29265

whats the diff between jsp and servlets?

HCL, TCS,

9 13444

Hi Friends.. can any one provide the real time example for methodoverloading and methodoverriding .........

Honeywell,

2 7696

os is developed in c no java is more secured then c na why dont the os developed is developed using java

1 4171

why java does not support mulitple inheritance directly?

TCS,

3 6314

what is the replacement for GOTO in java?

CTS,

2 12795

how can we synchronize Hash map?

CTS,

3 11891

Can you explain the difference b/n abtract and interface with a good example,?In what cases we have use abtract and what case interface?

Satyam,

4 8318

How to deprecate a method? Show it with proper example. Plz give the answer of this.Thanx in advance. mail me: tanzeem.akhtar@gmail.com

2 4506

What is compile time polymorphism?

CTS, Elementus Technologies, Oracle,

20 38413

What is run time polymorphism?

eClerx, Elementus Technologies,

6 18623

why is multiple inheritance not allowed in java?

Elementus Technologies, Huawei, Infosys,

7 15746

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Un-Answered Questions { Core Java }

Why Java is not pure Object Oriented language?

1074

What is annotation in java?

1010

What are the types of methodology?

1052

What is consumer interface?

960

Can memory leak in java?

994

What does 0 mean in boolean?

945

What is an iterator java?

1041

What is the constructor?

1008

When do we use synchronized methods in java?

1006

What are 4 pillers of object orinted programming?

963

How we can generate random numbers in java?

1097

What is the difference between length and length () in java?

902

What is arraylist e in java?

1018

What is the use of default method in interface in java? Explain

950

How do you add an element to an arraylist in java?

902

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