Identify the problem with the above schedule, and produce a correct locking-based serializable schedule.
What will be an ideal response?
The problem is that the locking algorithm releases the locks that are held by a transaction as soon as the associated database command is executed, and that lock unit no longer needs to be accessed. However, the transaction itself is locking other items after it releases its lock on the data item. This permits transactions to interfere with one another, resulting in the loss of total isolation and atomicity. Need to use two-phase locking. Correct schedule (for example):
S = [wl 1 (y), wl 1 (z), R 1 (y), W 1 (y), R 1 (z), W 1 (z), rl 1 (y), rl 1 (z), C 1 ,
wl 2 (y), wl 2 (z), R 2 (y), W 2 (y), R 2 (z), W 2 (z), rl 2 (y), rl 2 (z), C 2 ]
You might also like to view...
Explain the error in the following code. You may give the warning message, or error message, your compiler might give for the following error, or you may describe the error. However you present the error, you must explain clearly what is wrong.
```
#include
List three probing questions that are part of the Daniel Hill interview. In particular what did you learn by following up on the questions you asked Daniel?
What will be an ideal response?
Create the following GUI using the Grid layout manager. You do not have to provide any functionality.
What will be an ideal response?
Which of the following is the best option to insert page numbers into your document?
A) Insert a text box at the bottom of page from the Insert tab. B) At the end of each page, type in the page number. C) Select Header & Footer group from the Insert tab. D) Insert page borders from the Page Layout tab.