May 2002
Beginner
408 pages
9h 10m
English
Content preview from Sams Teach Yourself ADO.NET in 24 Hours
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Hour 14
Quiz Answers
| 1: | What must be maintained when using the pessimistic concurrency approach?
|
| A1: | a and b. Both locks on data resources and database connections must be maintained in pessimistic concurrency. |
| 2: | In general, how is optimistic concurrency implemented?
|
| A2: | a. In general, you will need to compare original values (that you read from the data source) to current values in the data source before the data can be updated. If any of the comparison fails (indicating that the row was updated by someone else), you have encountered an optimistic concurrency ... |
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.