1. Use the Management Studio to create a new database called MyWebDB using the default settings. (If the database already exists, use the Management Studio to delete it and then recreate it.) 2. Use the Management Studio to create the following tables and relationships.
3. Define the UserID column in the Users table, the ProductsID column in the Products table, and the DownloadID column in the Downloads table as primary keys and identity columns.
4. In the Downloads table, set the UserID and ProductID column as the foreign keys. Ensure the Tables and Columns Specification section is expanded in screenshot.
5. Define the columns so none of them allow null values.
6. Use the Management Studio to create indexes for the foreign keys in the Downloads table.
7. Use the Management Studio to create a unique index on the EmailAddress and ProductName columns and a regular index on the DownloadDate column.

The "instance" relationship shows that something is an object of a

When making changes to optimize part of a processor, it is often the case that speeding up one type of instruction comes at the cost of slowing down something else. for example, if we put in a complicated fast floating-point unit, that takes space, and something might have to be moved farther away from the middle to accommodate it, adding an extra cycle in delay to reach that unit. the basic amdahl's law equation does not take into account this trade-off. a. if the new fast floating-point unit speeds up floating-point operations by, on average, 2ă—, and floating-point operations take 20% of the original program's execution time, what is the overall speedup (ignoring the penalty to any other instructions)? b. now assume that speeding up the floating-point unit slowed down data cache accesses, resulting in a 1.5ă— slowdown (or 2/3 speedup). data cache accesses consume 10% of the execution time. what is the overall speedup now? c. after implementing the new floating-point operations, what percentage of execution time is spent on floating-point operations? what percentage is spent on data cache accesses?

Using a conditional expression, write a statement that increments numusers if updatedirection is 1, otherwise decrements numusers. ex: if numusers is 8 and updatedirection is 1, numusers becomes 9; if updatedirection is 0, numusers becomes 7.