Answer:
C. NFC
Explanation:
NFC stands for Near Field Communication. NFC is been embedded in recent mobile device (ranging from phone to tablet) to ease payment. NFC is a short-range high frequency wireless communication technology that enables the exchange of data between devices over about a 10 cm distance.
From the option, Bluetooth look like a probable answer but when they are both compared; we realized that NFC has a shorter set-up time over bluetooth and is therefore faster than bluetooth.
Answer:
// Producer Thread
void *producer(void *param) {
buffer_item item;
while (true) {
item = rand() % 100;
sem_wait(&empty);
pthread_mutex_lock(&mutex);
if (insert_item(item))
printf("Can't insert item\n");
else
printf("Producer %d: produced %d\n", *((int*)param), item);
pthread_mutex_unlock(&mutex);
sem_post(&full);
}
}
// Consumer Thread
void *consumer(void *param) {
while (true) {
buffer_item item = NULL;
if (in > 0)
item = buffer[in - 1];
sem_wait(&full);
pthread_mutex_lock(&mutex);
if (remove_item(&item))
printf("Can't remove item\n");
else
printf("Consumer %d: consumed %d\n", *((int*)param), item);
pthread_mutex_unlock(&mutex);
sem_post(&empty);
}
}
Explanation:
An outline of the producer and consumer threads appears as shown above.
Answer:
Option A is the correct choice answer for the above question.
Explanation:
The programming concept says that every function returns some value. If the return value is not defined by the user then the function returns the garbage value otherwise it returns the defined value by the user.
The return value is defined by the user with the help of the "return" statement and with the help of the following syntax-
return value; // The return statement.
Hence the option A is right because it satisfies the above concept while the other is not because--
- Option B states that it must be longer than one line which is not correct.
- Option C states that it cannot be longer than one line but this line does not make any sense about the returned statement.
- Option D states that it describes the parameter value which is the wrong definition about the returned statement.
The correct answer is 1.6
A network computer depend on on a centralized computer for most of its services. It can consequently have a minimal operating system while a personal computer on the other hand has to be proficient of on condition that all of the required functionality in a detached manner without depending on a centralized manner. Scenarios where administrative costs are high and where sharing leads to more efficient use of resources are exactly those settings where network computers are preferred.
