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

Core Java Interview Questions

Questions Answers Views Company eMail

whats the life cycle of jsp

Satyam,

2 5993

what is mean by method signature?

Satyam,

8 13082

what is mean by String and StringBuffer? What is mean by Methooverriding and Overloading?

Satyam, STI,

3 8853

whats the life cycle of jsp

Satyam,

15 23617

wht is customised exception?

Logica CMG, Novell, Prudential,

1 6744

what is diff bet iterator and enumeration?

4 9591

whats is the use of final,in which situation final can be used in the application?

DNS,

2 5682

Explain class A{} class B{} class C{} all the three classes are saved in a single file name, what the name should i provide to the file ,in what file name should i run the program? Ple Explain

DNS, Infosys, TCS,

9 13784

what is overloading in java?

Ascent, DNS, Infosys, SDA, VelTech,

13 34592

They had given one progam final HashMap hm=new HashMap(); public void show() { hm.put("name",value); } in this prg here the final hashtable value can be changed in put method,its the prg run?

DNS, Wipro,

3 13798

they asked class A{} class B{} class c{} all the three class saved as a single file,there is no main method in the file and anothe class M.java class m { psvm(String args[]) { // here the parent class can access } }

DNS, IPSR Solutions,

2 6459

how you will prevent inheritance is there any other way other than inheritance?

Wipro,

4 9490

how you will prevent method overriding?

HCL,

6 14737

byte a=5; byte b=5; byte c=a+b; System.out.println(c); whats the o/p?

NIIT, Wipro,

7 24043

whats is inheritance?

CTS, HCL,

15 19708

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Un-Answered Questions { Core Java }

What is the reason behind using constructors and destructors?

1062

What is t type java?

1061

Can we have return statement in finally clause? What will happen?

964

What do you mean by Hash Map and Hash Table?

1096

What is argument in java?

1021

What do you mean by formatting?

995

What is a website container?

954

How to sort a collection of custom Objects in Java?

1058

What is singleton class and how can we make a class singleton?

1100

What is the destroy method?

1040

What is the difference between quicksort & mergesort? When should they be used? What is their running time?

1089

What is the purpose of skeleton and stub?

1242

What are different access specifiers in java?

1016

What is the difference between final, finally and finalize() in java?

1155

What best practices should you follow while writing multithreaded code in java?

1073

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