Answer:
When the driver is <em>reversing the car</em>
Explanation:
The Rear Cross Traffic Alert (RCTA) is Nissan's <em>risk of collision detector</em> that warns drivers if one or more cars are approaching the rear of your car when backing up from a parking space.
Sensors around the back of the vehicle identify vehicles drawing nearer from the either way. A notice tone and glimmering light will appear and alert the driver to stop.
Answer:
int sumid=0; /* Shared var that contains the sum of the process ids currently accessing the file */
int waiting=0; /* Number of process waiting on the semaphore OkToAccess */
semaphore mutex=1; /* Our good old Semaphore variable ;) */
semaphore OKToAccess=0; /* The synchronization semaphore */
get_access(int id)
{
sem_wait(mutex);
while(sumid+id > n) {
waiting++;
sem_signal(mutex);
sem_wait(OKToAccess);
sem_wait(mutex);
}
sumid += id;
sem_signal(mutex);
}
release_access(int id)
{
int i;
sem_wait(mutex);
sumid -= id;
for (i=0; i < waiting;++i) {
sem_signal(OKToAccess);
}
waiting = 0;
sem_signal(mutex);
}
main()
{
get_access(id);
do_stuff();
release_access(id);
}
Some points to note about the solution:
release_access wakes up all waiting processes. It is NOT ok to wake up the first waiting process in this problem --- that process may have too large a value of id. Also, more than one process may be eligible to go in (if those processes have small ids) when one process releases access.
woken up processes try to see if they can get in. If not, they go back to sleep.
waiting is set to 0 in release_access after the for loop. That avoids unnecessary signals from subsequent release_accesses. Those signals would not make the solution wrong, just less efficient as processes will be woken up unnecessarily.
Answer:
- Gather customer feedback: Email Survey
- Tell customers about the extended opening hours: Social Media Page
- Show customers Hamish’s latest hair looks: An online gallery
- Help customers find the new salon: A map
Explanation:
1. By sending a questionnaire or survey via email, Hamish can gather customer feedback. Customers can answer these questionnaires directly in attached questions. They can also give feedback over email. Email survery is an economical way to collect feedback and can be sent to a many customers at the same time.
2. Hamish can tell customers about opening hours by a Social Media Page is a mean to assist social media accounts through QR Codes. He can update with his salon information via this web page. When customers scan can see salon's logo, information etc on this page in order to follow.
3. Hamish can display his latest hair looks through an online gallery by sharing his photos to many people. These images are stored, organized displayed and shared on the website (online gallery). This is a better option than using expensive albums and hard copies.
4. Hamish can help customers to find a new salon by providing a map on his website. This makes easier for customers to locate the new salon as map provides with the navigation information. Customers can get a route from their current location to the salon.
for i in range(20, 51, 2):
print(i)
Answer:
An Online Reservation System is a software you can use for managing reservations for your service. ... Basically, an online reservation system allows a potential customer to book and pay for a service directly through a website.
Explanation:
An Online Reservation System is a software you can use for managing reservations for your service. Be it a pool, fitness center, gym, yoga studio, or a parks & recreation center an Online Reservation System allows all kinds of service businesses to accept bookings and appointments online and manage their phone and in-person bookings with ease.
Basically, an online reservation system allows a potential customer to book and pay for a service directly through a website. That means from the moment a customer decides they want to book a slot for your service (be it an in-house class or online appointment) to choosing a date, picking a time, and paying for the booking, membership management, everything is handled online! It greatly reduces the workload on your staff and removes the opportunity for double-bookings.
hope it helps
