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Alchen [17]
3 years ago
14

If we can lock a file, we can solve the race condition problem by locking a file during the check-and-use window, because no oth

er process can use the file during the time window. Why don’t we use this approach to solve the race condition problems discussed in this chapter?
Computers and Technology
1 answer:
yKpoI14uk [10]3 years ago
5 0

Answer:

A file can only be locked out to other users or processes only if it's already open, meaning it's in use as a resource during the time window and therefore it's impossible solving the race condition problem by locking the file during the check-and-use window.

Hence, during the check-and-use process, it's impossible to lock a file.

In conclusion, any lock created can be ignored by the malicious process.

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Assume the following variable definition appears in a program:
AnnZ [28]

Answer:

cout << setprecision(2)<< fixed << number;

Explanation:

The above statement returns 12.35 as output

Though, the statement can be split to multiple statements; but the question requires the use of a cout statement.

The statement starts by setting precision to 2 using setprecision(2)

This is immediately followed by the fixed manipulator;

The essence of the fixed manipulator is to ensure that the number returns 2 digits after the decimal point;

Using only setprecision(2) in the cout statement will on return the 2 digits (12) before the decimal point.

The fixed manipulator is then followed by the variable to be printed.

See code snippet below

<em>#include <iostream>  </em>

<em>#include <iomanip> </em>

<em>using namespace std;  </em>

<em>int main()  </em>

<em>{  </em>

<em> // Initializing the double value</em>

<em> double number = 12.3456;  </em>

<em> //Print  result</em>

<em> cout << setprecision(2)<< fixed << number;  </em>

<em> return 0;  </em>

<em>}  </em>

<em />

4 0
3 years ago
A pointing device uses light to determine hand motion.
kirill [66]
The answer to this is Optical mouse. 

The reason the answer is optical mouse is because the optical mouse is a computer mouse which uses a light source, typically a light-emitting diode, and a light detector, such as an array of photodiodes, to detect movement relative to a surface. 

Hope this helped :)
have a great day 
3 0
3 years ago
What can you do if brainstorming only gives you a small or incomplete idea?
Grace [21]

Answer:

D. All of the above

Explanation:

5 0
3 years ago
I need help quick Which of the following principles is not part of the constitution?
laila [671]

Answer:

Confederalism is not in the constitution it was adopted later.

Explanation:

5 0
3 years ago
One of the greatest benefits of dual enrollment courses is that students can receive:
Vika [28.1K]
I think the answer to this is A
7 0
2 years ago
Read 2 more answers
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