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Interview question

surya praveen

Joined: Aug 11, 2008
Posts: 3
hi ,
Can anyone explain "how can we explain object and class using real time exmples?"
Martijn Verburg

Joined: Jun 24, 2003
Posts: 3275

Originally posted by surya praveen:
hi ,
Can anyone explain "how can we explain object and class using real time exmples?"


As for 'real time examples' you could discuss the concept of an 'Event', e.g. An Event class represents trade events flowing through a financial system in real time, an instance of that Event class is the object.

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Amit Ghorpade

Joined: Jun 06, 2007
Posts: 2846

Firstly please UseAMeaningfulSubjectLine for your topic.
This is your second thread with the same subject "Interview question".
Regarding your question, an object can be a student with roll number 123
whereas student itself is a class.
Please take some time to read the ask good question link below.

|Asking Good Questions|
Paul Sturrock

Joined: Apr 14, 2004
Posts: 10336

Hmm. I don't want to sound discouraging, but if you struggle with this question in an interview, you are probably not ready to be interviewing for a Java job.

Rather than go through that pain, have a read through the Java tutorial. This covers the basics. You might also Google for "Thinking In Java" which is a good, free book about the language.

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Ulf Dittmer

Joined: Mar 22, 2005
Posts: 42959
As for 'real time examples' you could discuss the concept of an 'Event'

I'm fairly certain that what is meant here are "real world examples", not "real time examples".
[ August 11, 2008: Message edited by: Ulf Dittmer ]
K. Tsang

Joined: Sep 13, 2007
Posts: 3059

I agree with Paul. If you ask this. Why not ask can a car for example be an "object"? Can car be a "class"?

Ultimately I personally think, anything can be object and/or class depending on how you look at it. It's like if it "has" attributes then it's a class/object. If it can't have any lower-denominated attribute (so to speak) then it can't be class/object.

Simple definition in real life is object=physical representation and class=logical representation of something.

K. Tsang JavaRanch SCJP5 SCJD OCPJP7 OCPWCD5 OCPBCD5 OCPWSD5 OCMJEA5 part 1 part 2/3
I agree. Here's the link:
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