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 5995

what is mean by method signature?

Satyam,

8 13093

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

Satyam, STI,

3 8860

whats the life cycle of jsp

Satyam,

15 23643

wht is customised exception?

Logica CMG, Novell, Prudential,

1 6749

what is diff bet iterator and enumeration?

4 9598

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

DNS,

2 5684

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 13796

what is overloading in java?

Ascent, DNS, Infosys, SDA, VelTech,

13 34625

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 13807

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 6463

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

Wipro,

4 9495

how you will prevent method overriding?

HCL,

6 14748

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

NIIT, Wipro,

7 24056

whats is inheritance?

CTS, HCL,

15 19718

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Un-Answered Questions { Core Java }

What are voids?

965

What are Normalization Rules? Define Normalization?

1059

Explain oops concepts in detail?

1030

What is difference between throw and throws ?

1140

What is meant by data hiding/encapsulation?

1106

What about method local inner classes or local inner classes in java?

1062

Can we access the non-final local variable, inside the local inner class?

1037

Why a dead thread occurs?

980

What is difference between calling start() and run() method of thread?

1134

How to make a write-only class in java?

1066

What’s a deadlock?

1103

What is starvation?

1324

What is module in oop?

1017

In java how do we copy objects?

1055

Does a function need a return?

973

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