For the following two schedules, insert the appropriate locks (shared and exclusive) into the schedule following the strict 2pl protocol. also explain what happens as the scheduler executes each schedule.
note that, if a transaction blocks because of an operation, the transaction with the next operation in the schedule will continue. if you have a deadlock, you need to chose a transaction to abort, release its locks, and let the rest of the schedule continue. you need to restart the aborted transaction again at some point after it has been aborted. when a transaction unblocks, it resumes its operations.

write the actual executed schedule at the end. (ri means transaction i reads an item and wi writes an item.)

(a) r1(a); r2(b); r3(c); w1(b); w2(c); w3(d);

(b) r1(a); r2(b); r3(c); r1(b); r2(c); r3(a); w1(a); w2(b); w3(d);

Octothorpe is another name for what common computer keyboard symbol?

Creating "smart interfaces" in all sectors of industry, government, and the public arena is one of the fastest growing hct areas. these interfaces model, interpret, and analyze such human characteristics as speech, gesture, and vision. the field of biometrics, in which humans authenticate themselves to machines, is an area of considerable interest to hct practitioners. fingerprint scans are one of the most frequently used biometric options, and this article, biometric student identification: practical solutions for accountability & security in schools, makes a case for the implementation of fingerprint scans in schools. critique the article, and answer the following questions: according to the author, what are the main benefits of adopting fingerprint scans in schools for student identification? according to the author, what are the main drawbacks of adopting fingerprint scans in schools for student identification? do you agree with the author's assessment of the pl

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