Answer:
Semaphores carries the signal between the task and interrupts that does not carry any type of additional data in the embedded system. A semaphore is used as synchronization object and helps in maintain the value between zero and the specific higher value.
It basically reduced the value each time and complete the semaphore object in the embedded system. Binary semaphores is the main type of semaphore that invoke activation of the task.
Mediocre skills required.
Answer:
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Explanation:
To function, a computer system requires four main aspects of data handling: input, processing, output, and storage. The hardware responsible for these four areas operates as follows: Input devices accept data in a form that the computer can use; they then send the data to the processing unit.
Answer:
Four buttons are needed for this application
Explanation:
The user activities such as entering the user name, subject, preferred appointment time and phone number are done using a text box. Typically, a text box is used to display, or accept as input, texts from the user.It is a graphical control element intended to enable the user to input text information to be used by the program.
Only activities such as submission of requests, Printing appointment request, clearing the screen and exiting the application, will require the user to click on a button. The buttons should be properly labelled and made to function on click/trigger.
