What is cache coherence in memory organization?Select one:a. Ensuring that multiple memory modules have the same speedb. Ensuring that multiple CPUs share the same cachec. Ensuring that multiple caches contain consistent datad. None of the above

Illustrate the challenges and considerations associated with achieving cache coherence in shared memory multiprocessor systems.

. Implementing a Cache Coherence Protocol (Practical) Cache coherence protocol is a set of rules and mechanisms used in multiprocessor systems to maintain consistency among the caches (small, fast memory units) of multiple processors accessing the same shared memory. Simply speaking, imagine you have several people (processors) working together on a project and each person has their own notebook (cache) where they keep information about the project. Now, if one person updates information in their notebook, the others need to know about it to avoid confusion or mistakes. Similarly, in a multiprocessor system, if one processor updates data in its cache (I hope you all know what cache means), the cache coherence protocol ensures that all other caches are updated accordingly. This way, all processors have a consistent view of the shared memory, preventing data inconsistencies or errors. • Objective: Simulate a basic cache coherence protocol in a multiprocessor system. • Guidelines: • Create a new Python file named cache_coherence_simulation.py. • Implement the SharedMemory class to represent shared memory. • Implement the Processor class to represent each processor/thread. • Simulate read and write operations by multiple processors and observe cache coherence behaviors. Advanced Operating Systems/ Astana IT University / Lab 6 • Run the program and analyze the output. Example output:  Simulation of Cache Coherence Protocol in Multiprocessor System Initializing processors and shared memory... Processor 1 reads from memory: Value at address 0x0001 = 0 Processor 2 reads from memory: Value at address 0x0001 = 0 Processor 2 writes to memory: Set value at address 0x0002 = 30 Processor 1 writes to memory: Set value at address 0x0001 = 20 Processor 1 reads from memory: Value at address 0x0002 = 30Processor 2 reads from memory: Value at address 0x0002 = 30 Simulation completed.

Cache memory plays a crucial role in enhancing a computer's processing speed. Consider the following statements regarding cache memory characteristics and select the correct combination:Options:Cache memory is larger than RAM in terms of storage capacity.Cache memory is located between the RAM and the CPU.L1 cache is typically larger but slower than L2 cache.Cache hit rate is a measure of the percentage of requested data found in the cache.Cache memory is non-volatile and retains data even when the power is turned off.Cache coherence ensures consistency of data across multiple cache levels.

The idea of cache memory is primarily based on:

The effectiveness of the cache memory is based on the property of ________