When the application of an optimistic approach to concurrency control is implemented, it is frequently observed that transactions experience prolonged durations for completion. Explain?

How do timestamps help in concurrency control?

When an optimistic approach to concurrency management is employed, transactions frequently require a considerable amount of time to conclude. Explain?

When an optimistic approach to concurrency control is utilised, transactions can take an extremely lengthy time to complete. Explain.

Transaction delays are commonplace when using an optimistic concurrency control approach. Explain.

1(WEB SCRAPING WITH THE REQUESTS AND BEAUTIFUL SOUP LIBRARIES) Web pages are excellent sources of text to use in NLP tasks. In the following IPython session, you’ll use the requests library to download the www.python.org home page’s content. This is called web scraping. You’ll then use the Beautiful Soup library37 to extract only the text from the page. Eliminate the stop words in the resulting text, then use the wordcloud module to create a word cloud based on the text. Its module name is bs4for Beautiful Soup 4. In [1]: importrequests   In [2]: response = requests.get('https://www.python.org')   In [3]: response.content # gives back the page's HTML   In [4]: frombs4 importBeautifulSoup   In [5]: soup = BeautifulSoup(response.content, 'html5lib')   In [6]: text = soup.get_text(strip=True) # text without tags In the preceding code, snippets [1]–[3] get a web page. The get functionreceives a URL as an argument and returns the corresponding web page as a Response object. The Response’s…

Transaction management deals with the problems of always keeping the database in a consistent state even when concurrent accesses and failures occur. Isolation requires that each transaction sees a consistent database at all times and that an executing transaction cannot reveal its results to other concurrent transactions before its commitment. ANSWER If two concurrent transactions access a data item that is being updated by one of them, it is not possible to guarantee that the second will read the correct value. Dirty reads and nonrepeatable reads may occur when one transaction can see intermediate results of another transaction before it has been committed.. Given below are two concurrent transactions T1 and T2 whose balances of amount x (balx) were recorded at times t, between t₁ and tg. As shown in the table below: If these two transactions interfere with each other, fill in the table below by selecting from the drop down list the values of balance X (bal,) at specified times…

When an optimistic approach to concurrency management is used, it is typical for transactions to take a long time to complete. Explain?

When you take the bull by the horns and apply an optimistic approach to concurrency control, it's no surprise that transactions can drag their feet and take forever to wrap up. Explain?

Explain the two-phase locking protocol and its significance in concurrency control.