Describe two types of pitfalls associated with risk assessment.
What will be an ideal response?
(1) Many individuals and businesses can sometimes make errors in judgment when assessing risks. An individual might, for example, install the best home security system to ward off burglars yet use easy-to-guess passwords that make them vulnerable to hackers. (2) Other times, solutions to problems can lead to greater problems. For example, requiring that your company's users change their passwords every few days might seem like a great idea. However, this may lead to employees writing down these easily-forgettable passwords around their office, increasing the risk that someone might see (and steal) them.
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The second step of the sharp checkpoint recovery procedure is as follows: The log is scanned forward from the checkpoint. The after-images in all update records are used to update the corresponding items in the database. Assuming a locking concurrency control in which locks are held until commit time, show that the updates can be performed in either of the following orders:
a. As each update record is encountered in the forward scan, the corresponding database update is performed (even though the update records for different transactions are interleaved in the log). b. During the forward scan, the update records for each transaction are saved in volatile memory, and the database updates for each transaction are all done at once when the commit record for that transaction is encountered during the forward scan.
How would you represent 3, 5, 8, and 13 in the binary number system?
What will be an ideal response?
List three things you need to do when setting up an array. Why do you need to consider the number of cells you will need?
What will be an ideal response?
What two colored RCA connectors in a component video cable are used for audio?
A. red B. blue C. white D. green