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 6000

what is mean by method signature?

Satyam,

8 13108

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

Satyam, STI,

3 8873

whats the life cycle of jsp

Satyam,

15 23674

wht is customised exception?

Logica CMG, Novell, Prudential,

1 6758

what is diff bet iterator and enumeration?

4 9610

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

DNS,

2 5695

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 13834

what is overloading in java?

Ascent, DNS, Infosys, SDA, VelTech,

13 34663

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 13823

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 6476

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

Wipro,

4 9501

how you will prevent method overriding?

HCL,

6 14769

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

NIIT, Wipro,

7 24083

whats is inheritance?

CTS, HCL,

15 19763

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Un-Answered Questions { Core Java }

What does exclamation mean in java?

1115

Is array serializable java?

993

What is java and their uses?

1055

Can abstract class have private constructor?

953

What is jagged array in java?

1098

What is the difference between method overriding and overloading?

1244

Can a static class have a constructor?

1011

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

1006

How many types of keywords are there?

1004

How to find the given number is a prime number or not by getting input from the user

1106

How will you call an Applet using Java Script Function?

1045

What is public static?

1048

Why isn’t there operator overloading?

1102

What language is pass by reference?

1024

What is the base class in java from which all classes are derived?

989

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