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1. Correct Answer: C A. Incorrect: You specify snapshot replication when information is updated infrequently and it is resource-effective to send a whole new snapshot rather than replicate changes. Snapshot replication is not appropriate for regular, two-way replication. B. Incorrect: You specify transactional replication when changes to a publication need to be replicated immediately to Subscribers, typically with a latency of two minutes or less. You can configure transactional replication to accept updates at the Subscriber, but more typically you would specify it for oneway replication. C. Correct: You specify merge replication when replication can be scheduled and does not need to be real-time. Merge replication is typically two-way. D. Incorrect: You specify the Remote Distributor model if a number of Subscribers exist at a distant location and the remote Distributor receives updates from the Publisher and distributes them to its local Subscribers. This situation does not apply to this scenario. 2. Correct Answer: B A. Incorrect: The constraint exists at the Publisher and cannot be configured on the Subscriber. B. Correct: To prevent the Subscriber from replicating the CHECK constraint, you need to configure the CHECK constraint with the NOT FOR REPLICATION clause on the table in the Publisher database. C. Incorrect: The constraint exists at the Publisher and cannot be configured on the Subscriber. Also, a UNIQUE constraint ensures that no duplicate values are entered in specific columns that do not participate in a primary key, which is not what the question requires. D. Incorrect: A UNIQUE constraint ensures that no duplicate values are entered in specific columns that do not participate in a primary key. This is not relevant in this scenario. 3. Correct Answer: D A. Incorrect: The solution needs to work if all connected disks fail. This includes the quorum disk, so clustering does not meet the specification.
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B. Incorrect: Transactional replication provides a degree of fault tolerance, but failover is not its primary purpose. Failover would not be seamless or transparent to users connected to the database when the server fails, and administrator intervention would typically be required to allow database updates on the Subscriber if the Publisher failed. C. Incorrect: Log shipping requires that you back up the transaction log on one computer and restore it to the other. If all disks fail on the primary computer, the most recent transactions might be lost. Failover might not, therefore, be seamless. Microsoft recommends the use of database mirroring rather than log shipping. D. Correct: Database mirroring is the only solution listed that meets the specification and is therefore the correct answer.
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Exam Tip Always answer the question asked. In practice, clustering is often the solution to failover requirements. Modern storage solutions using disk arrays very seldom fail completely. However, Question 3 requires the solution to work even if all disks fail. This requirement determines the correct answer.
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4. Correct Answer: B A. Incorrect: A warning that a merge length for LAN connections has exceeded or met its threshold tells you whether a merge length exceeds the threshold you specify. Having a merge length that exceeds a specified threshold does not prevent the merge from occurring until the subscription has expired. B. Correct: A warning that a subscription will expire within the threshold indicates imminent subscription expiration, which will result in the failure of an update. C. Incorrect: A warning that the rows merged per second for LAN connections has fallen below or met its threshold tells you whether the merge process is meeting the target you specified. Failure to meet this target could indicate a problem, but this does not prevent the merge from occurring until the subscription has expired. D. Incorrect: The Warn If Latency Exceeds The Threshold warning is used for transactional replication, not merge replication. 5. Correct Answer: D A. Incorrect: The NOT FOR REPLICATION clause stops the trigger from being executed when a replication agent modifies the table on which the
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