Backup Process

Hey guys. I have a question concerning the process a backup does.

Let's say i have MY_DB.mdf set to start at 1mb and unlimited growth by 1mb, and recovery mode is set to full.
Let's also say the log file MY_DB.ldf is set to start at 1mb and unlimited growth by 1mb.

First Question:
This means the more data is added past it's current size, the file for which data was entered will grow by 1mb, forever if left untouched, right?


Next Question:
When I do perform a full backup, let's say a manual backup for now and that I'm using SQL 2005, does a full backup clean up the log file? What I mean by this is, if there are 10000 log entries in the log file, does a backup clean up some of those entries?

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Reason for this forum:

I ask this because I have a test database I am working with in conjunction with ApexSQL Log (http://www.apexsql.com/sql_tools_log.asp) to test out the software. What I just ran across is that being just a test database I have not backed it up, rather have another copy of it from before I started adding data. It's properties are as described above. The ApexSQL software reads transactions logs allowing one to audit database activites and even reverse any transactions. Before I started using it, I decided to delete about 50 records. Then, a week later, I performed a backup (remember I have never done a backup before) and then I ran the software. The transactions shown in the software only dated back about 2 days earlier, not a week ago. I also looked at the size of my log file and it was only 1mb, and I expected it to be larger. i didnot, however, check the size before any of these steps. That is why I ask if in SQL 2005, does a full backup clean up and/or shrink the log file?


- RoLY roLLs