Amazon Interview Question for Software Engineer / Developers


Country: United States
Interview Type: In-Person




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3
of 3 vote

The answer is optimistic concurrency control.

Divide the page into multiple segments. Assign each segment a version number which increments on every update. The list of version numbers is communicated to the clients as well. Before updating a segment, the client gets the latest page and its versions from the server. Updates the page and sends it across to the server along with the versions. If any part of the page is updated, the version on the server would change. If so, reject the clients request along with the latest page and the changed versions.

- dr.house April 06, 2014 | Flag Reply
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1
of 1 vote

The algorithm is called as "Operational Transformation".

- Vijay S April 08, 2014 | Flag Reply
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0
of 0 vote

In this scenario we can use a real time update of client for any of the change event generated at the client

- Mohit April 06, 2014 | Flag Reply
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0
of 0 vote

What about using a singleton design pattern?

- Vikram Sidhabathuni August 04, 2014 | Flag Reply


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