A. a program segment that has not been proved bug-free
B. a program segment that often causes unexpected system crashes
C. a program segment where shared resources are accessed
D. one which is enclosed by a pair of P and V operations on semaphores
Check Answer
The correct answer is C) a program segment where shared resources are accessed.
A critical region is a segment of a program where shared resources, such as memory or I/O devices, are accessed. In a multi-process or multi-threaded environment, a critical region must be accessed by only one process or thread at a time to avoid conflicts and ensure data consistency.
Option A, a program segment that has not been proved bug-free, is not a correct definition of critical region. It describes an unverified or potentially problematic code segment, but not specifically a critical region.
Option B, a program segment that often causes unexpected system crashes, is also not a correct definition of critical region. It describes a code segment that causes system instability, but not specifically a critical region.
Option D, one which is enclosed by a pair of P and V operations on semaphores, is a synchronization technique used to control access to critical regions, but it is not a definition of critical region itself.
A critical region is a segment of a program where shared resources, such as memory or I/O devices, are accessed. In a multi-process or multi-threaded environment, a critical region must be accessed by only one process or thread at a time to avoid conflicts and ensure data consistency.
Option A, a program segment that has not been proved bug-free, is not a correct definition of critical region. It describes an unverified or potentially problematic code segment, but not specifically a critical region.
Option B, a program segment that often causes unexpected system crashes, is also not a correct definition of critical region. It describes a code segment that causes system instability, but not specifically a critical region.
Option D, one which is enclosed by a pair of P and V operations on semaphores, is a synchronization technique used to control access to critical regions, but it is not a definition of critical region itself.
