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.
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.
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.