Bank of America Interview Question for Software Engineer / Developers

Country: India
Interview Type: In-Person

Comment hidden because of low score. Click to expand.
of 1 vote

I think the main problem with your solution is the lack of a restore method. When using a memento you don't want to replace an existing object with a memento, you want to change the existing object's state back to how it was when the memento was taken. Your originator doesn't allow for that.

I'd stick on a restore method, and probably create a separate class for the memento because it probably doesn't need all of the originator's functionality and in many cases not all of its state. For example, if the originator is a word processor and it's creating a memento of the characters typed, you wouldn't want to clone the whole word processor.

- Anonymous March 21, 2013 | Flag Reply
Comment hidden because of low score. Click to expand.
of 0 votes

I agree with Anonymous above.

You are supposed to store the state of the originator rather than entire originator object. When i say state, it is the data inside originator not the originator itself.

- Sudhindra.A March 22, 2013 | Flag
Comment hidden because of low score. Click to expand.
of 0 vote

Your example is relevant to Memento Pattern.

I think he was expecting few completely-defined, like :
- Memento will be a class, having methods - Save & Restore
- Caretaker will be having a collection of Mementos

- Sudhindra.A March 21, 2013 | Flag Reply

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