Semaphores is a�synchronization�tool to overcome the critical section problem.
A semaphore S is basically an integer variable that apart from initialisation is accesses only through atomic operations such as wait() and signal().
Semaphore object basically acts as a counter to monitor the number of threads accessing a resource.
Mutex is also a tool that is used to provide deadlock free mutual exclusion.It protects access to every
critical data item.if the data is locked and is in use,it either waits for the thread to finish or awakened to
release the lock from its inactive state.
Model transformations And Interaction Semantics
Watchdog Timer Interview Questions
Macros And Inline Functions Comparison�
What are the commonly found errors in Embedded Systems?
Damage of memory devices due to transient current and static discharges.
Malfunctioning of address lines due to a short in the circuit
Malfunctioning of Data lines.
Some memory locations being inaccessible in storage due to garbage or errors.
Improper insertion of Memory devices into the memory slots
Faulty control signals.
What is the need for having multi byte data input and output buffers in case of device ports?
It�s normally the case that some devices transfer the output either in a bursty or a sequential manner and also during input entry. If we take the example of keyboards, all the data entered is stored in a buffer and given at a time or one character at a time.
In case of networking there may be several requests to access the same resource and all these are queued in a buffer and serviced in the order they are received.Hence to avoid the input/output units from getting overloaded with requests, we use multibyte buffers.
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