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 is the is a and has a relation ship in oops concept in java?

BearingPoint, TCS,

9 42884

what is the difference between pagecontext and servletcontext?

JBA Infotech, TCS,

5 22423

EDS (Electronic Data Systems India Pvt Ltd) at Chennai on 16-12-2006.

EDS,

1 9210

Which is not Object in Java?

Honeywell,

10 16745

Iterator in the HashMap is fail-safe means what?

CTS, IBM, Subex,

9 37193

hi am an engineering student and my next plan is for ms in either in us or australia i got my passport but i dont know anything bout visa can u give brief idea 1)How to get prepared for visa and 2)How to apply for top universities and 3)How to pay the fee and so on These all are basic questions plz give me a clear idea

1924

can we write a program with out a class in core java?

Wipro,

11 17174

Why non nested classes in java are not having marked as protected access specifier

Google,

2 11234

for what purpose we use applets ?

Mindlogicx,

3 11734

What do u mean by wrapper Class? What do u mean by Jvm... How do u change JVM for other OS? Or No need to Change ...? its like tricky

Accenture, EDS,

6 18293

what is dynamic method dispatch ?

Fidelity, MUET, SDSF,

27 53420

suppose string s1="rajnish"; string s2="bhaskar"; then what will be happend ?

Fidelity,

9 12709

what is the Arraylist limit (maximum) by default ?

Fidelity, PlanetSoft, Wipro,

13 47385

can you create interface instance ?

Fidelity, TCS,

54 78698

which one the better thread emplemented thread or extended ?

Fidelity,

4 8816

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Un-Answered Questions { Core Java }

What is a default constraint?

1070

Name the components that are termed to be Heavy-weight component but available in Light-weight components?

2491

What are the advantages of arraylist over arrays?

1092

What is type inference in java8?

1049

Is there any sort function in java?

1048

Can we sort hashmap in java?

959

How do you sort a list in java?

1033

When should you use arraylist and when should you use linkedlist?

932

How to optimize the javac output?

1023

What is an empirical question?

968

What is the replace tool?

1168

What is the base class for error and exception?

1000

What is OOP Language?

1075

What is java command?

1085

Is it possible to compare various strings with the help of == operator? What are the risks involved?

1074

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