Answer:
False
Explanation:
WAN's are a wide area covered in LAN's. LAN's only cover 1 building, while WAN's are a bunch of LAN's in a WIDE area (WAN = wide area network)
i hope this helps you :D
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.
With a centralized database system, the databases used by the system are all located on a single computer, such as a server or mainframe computer.
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What are database systems?</h3>
Database is a collection of related data stored in a manner that it can be retrieved as needed. Database system or Database Management System (DBMS) are enables us to create, maintain, and access databases. A database typically consists of Tables, Fields (columns) and Records (rows).
Advantages of DBMS approach are low level of redundancy, faster response time, lower storage requirements, easier to secure, increased data accuracy. Disadvantage of DBMS approach is increased vulnerability (backup is essential).
To learn more about database systems refer to:
brainly.com/question/518894
#SPJ4
Answer:A database is an organized collection of structured information, or data, typically stored electronically in a computer system. A database is usually controlled by a database management system (DBMS). ... The data can then be easily accessed, managed, modified, updated, controlled, and organized.
Explanation:A database could be grades that students get at school and to manage it we can use a spreadsheet program like excel
Answer:
It is most likely that in a tech surrounded environment there would be an apacolypse, not necessarily a man hunting man apacolypse but it would cause a huge panic throughout that country because government could not communicate which is what leaves people with a safeplace.
Explanation:
please mark as brainliest xx hope it helps <3
if you really like this topic watch into the forest on netflix, it has the same premise except its not that internet disappears its electricity.
