Sequential or direct memory retrieval are conceivable. Why do contemporary devices employ direct access? What are the advantages? How can direct-access devices receive data written sequentially?

Discuss the memory hierarchy in computing systems, from cache memory to secondary storage. What role does each level play?

Define the term "virtual memory" and elucidate its role in modern computing systems.

Data that has been stored in memory may be retrieved in one of two ways: sequentially or directly. What are the advantages of direct access in typical modern devices, and why do they use it? How can data that was created on a system that only enables sequential access be transformed so that it may be read by a system that only supports direct access?