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1. Correct Answer: A A. Correct: The Bookings and Customer databases depend upon each other. To ensure integrity across databases, the databases must reside on the same SQL Server instance and must fail over together. Failover clustering pro vides the only means to ensure that both databases fail over together and that integrity between the databases is maintained. B. Incorrect: Log shipping operates on transaction log backups with each transaction log localized to a database. Therefore, it is possible to restore the Bookings database to a different state from the Customer database. C. Incorrect: Replication operates at a database level, so transactions can be applied to each database independently. Replication does not guarantee (nor does it check) integrity across databases. D. Incorrect: Database Mirroring operates at a database level. Because trans actions are scoped within the storage engine at a database level, Database
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Mirroring does not guarantee integrity across databases. 2. Correct Answer: D A. Incorrect: Database Mirroring can keep a second copy of a database in sync with the primary, but the mirror database is inaccessible. B. Incorrect: A Database Snapshot could be created every six hours to use for reporting that will provide access to the data. However, all connections to the existing Database Snapshot would have to be terminated to regenerate a Database Snapshot with the same name. A Database Snapshot with a differ ent name could be created without terminating connections, but all report ing activity would have to be redirected to the new Database Snapshot. C. Incorrect: Log shipping can be used to maintain a copy in Standby Mode, which will enable read operations to occur. However, all user connections would have to be terminated to restore the next transaction log backup. D. Correct: Only replication enables changes from a primary database to be sent to a secondary database while also enabling read operations to occur while changes are being applied. 3. Correct Answer: D A. Incorrect: Database Mirroring does not enable the database to be placed into the Bulk-Logged recovery model. B. Incorrect: Failover clustering is generally limited in distance and is not an appropriate technology for protecting against widespread geographic disasters such as an earthquake. C. Incorrect: A database participating in replication can be placed into the Bulk-Logged recovery model. However, the replication engine will pick up only fully logged transactions. Any minimally logged transactions such as BCP or BULK INSERT are not distributed through the replication engine. D. Correct: Transaction log backups can still be taken against the Products database, so the Products database can be protected using log shipping. This also enables the secondary to be placed far enough away to avoid a widespread geographic disaster. 4. Correct Answer: C A. Incorrect: Although revoking sysadmin authority prevents anyone from changing the recovery model for the Products database, it also prevents these users from performing many other tasks.
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B. Incorrect: A database DDL trigger fires on when the specified action is issued within the database. Changing the recovery model is done by issu ing an ALTER DATABASE command, which is outside of the scope of a database-level DDL trigger. C. Correct: A DDL trigger created on the instance fires when an ALTER DATA BASE statement is issued. You can then inspect the command issued by interrogating the Eventdata() function to roll back any command changing the recovery model to Simple. D. Incorrect: Event notification sends a notice when an event occurs, but can not prevent an action. 5. Correct Answer: B A. Incorrect: The instance master key is tied to the instance and is not moved between instances. B. Correct: The database master key is used to encrypt the asymmetric key, so the database master key has to be restored to the secondary to be able to decrypt credit card data. C. Incorrect: Certificates are used with symmetric keys. D. Incorrect: Although it is a good idea to copy any SQL Server Agent jobs to the secondary that will be needed, jobs are not necessary to ensure a redun dant copy if the database is accessible. 6. Correct Answers: A and C A. Correct: An encrypted file system does incur overhead that causes backups and restores to take longer. The backups are encrypted, which, coupled with the encryption already present on the credit card information, makes it much more difficult for someone to hack. Even if they manage to steal any backup tapes, they would have to first crack the encryption on the backup files and then crack multilayer encryption within the database. B. Incorrect: The PASSWORD clause of the BACKUP command is not meant for security. The protection is weak and intended only to prevent inadvert ent restore operations. C. Correct: The credit card data is already encrypted using an asymmetric key that is encrypted with the database master key. To decrypt the credit card data, you need both the asymmetric key and the database master key. By locking the backup of the database master key in a separate location from your backups, you reduce the possibility of someone decrypting credit card
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