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What are semaphores?
Semaphore: A semaphore is a synchronization tool which gives a general-purpose solution to controlling access to critical sections. It s an abstract data type (ADT) which defines a nonnegative integer variable that, apart from initialization, is accessed simply through two standard operations that are: wait and signal. The typical definition of wait in pseudo code is
wait(S){
while(S<=0)
// do nothing
S--; }
The classical definitions of signal in pseudo code is signal(S){
S++; }
While one process modifies the semaphore value, anno one process can concurrently modify that similar semaphore value. As well, in the case of the wait(S), the testing of the integer value of S (i.e. S<=0), and its possible modification(S--), should also be executed without interruption.
What is actor? An actor is a direct external user of a system. Every actor shows objects that behave in a particular way towards systems. Actors are directly linked to system.
What is Matrix Addressing Mode. Ans. Matrix Addressing Mode: The arrangement which needs the fewest address lines is a square array of n rows and n columns for a whole memory
System is a word which is derived from the Greek word 'Systema' which means an organized relationship among components. A System can be defined as orderly grouping of interdepen
Raises when accessing an unassigned memory location accessing a null pointer
Problem (a) Distinguish between how NTFS and FAT store time. Describe your answer. (b) Unix epoch starts as from January 1, 1970, 00:00:00 GMT. Provide that Unix stores
Value Value is the relative amount of light and darkness in an image or a particular colour within an image. Value is also known as Tone and refers to the way the artist has re
The idea of clustering is defined as use of multiple computers naturally multiple storage devices, PCs or UNIX workstations and their interconnections to make what emerges to users
what is cascade rollback
Q. Find the average of two values? Find the average of two values which are stored in ; Memory locations named FIRST and SECOND ; And puts result in memory location AVG
what is the main goal of parallel processing
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