how queries run by MSDE
how stored procedures run in backend by MSDE
how triggers run by MSDE
where triggers and stored proc stored in MSDE and in which form
where logs are being maintained of transactions/DML statement by default
what are pseudo tables - Never heard of them, you may mean Derived Tables (A table created in a query that lives only during that query), or Views (a sql statement describing a virtual table)
how queries run by MSDE - You have to use a tool, like Query Analyzer or a client application to send queies to the MSDE engine
how stored procedures run in backend by MSDE - Same as above
how triggers run by MSDE - Triggers are run automatically by the database engine when the proper event happens to a table with a trigger on it.
where triggers and stored proc stored in MSDE and in which form - They are stored in system tables, you access them to create and edit them through Enterprise Manager or writing a DDL query in Query Analyzer
where logs are being maintained of transactions/DML statement by default - The log file(s) are where ever you tell the database to put them when you create a database. By default I think they are in the <SQl Server install location>\Data folder.
