You are designing a Windows Azure SQL Database for an order fulfillment system. You create a table named Sales.Orders with the following script.

Each order is tracked by using one of the following statuses:
✑ Fulfilled
✑ Shipped
✑ Ordered
✑ Received
You need to design the database to ensure that that you can retrieve the following information:
✑ The current status of an order
✑ The previous status of an order.
✑ The date when the status changed.
The solution must minimize storage.
More than one answer choice may achieve the goal. Select the BEST answer.

Correct Answer: B 🗳️

You create a stored procedure that retrieves all of the rows from a table named Table1.
You need to recommend a solution to ensure that all of the statements in the stored procedure can be executed if another transaction is modifying rows in Table1 simultaneously.
What should you recommend?

Correct Answer: A 🗳️
Once snapshot isolation is enabled, updated row versions for each transaction are maintained in tempdb. A unique transaction sequence number identifies each transaction, and these unique numbers are recorded for each row version. The transaction works with the most recent row versions having a sequence number before the sequence number of the transaction. Newer row versions created after the transaction has begun are ignored by the transaction.
Reference:
Transaction Isolation Levels

You have a SQL Server instance on a server named Server1.
You need to recommend a solution to perform the following tasks every week:
✑ Rebuild the indexes by using a new fill factor.
✑ Run a custom T-SQL command.
✑ Back up the databases.
What should you recommend?
More than one answer choice may achieve the goal. Select the BEST answer.

Correct Answer: C 🗳️
Maintenance plans create a workflow of the tasks required to make sure that your database is optimized, regularly backed up, and free of inconsistencies.
Reference:
Maintenance Plans

HOTSPOT -
You use SQL Server 2014. You create a table within a database by using the following DDL:

The following table illustrates a representative sample of data:

The system is expected to handle 50 million orders a month over the next five years.
You have been instructed by your Team Lead to follow best practices for storage and performance in the utilization of SPARSE columns.
Which columns should you designate as SPARSE? To answer, mark each column as SPARSE or NOT SPARSE in the answer area.
Hot Area:

Correct Answer:
Note:
Sparse columns are ordinary columns that have an optimized storage for null values. Sparse columns reduce the space requirements for null values at the cost of more overhead to retrieve nonnull values. Consider using sparse columns when the space saved is at least 20 percent to 40 percent.
Reference:
Use Sparse Columns