Computer Architecture - Old Questions

4. Differentiate between address space and memory space. An address space is specified 2 bits and the corresponding memory space by 16 bits. If a page consists of 2K words, how many pages and blocks are there in the system?

Difference between address space and memory space

An address used by programmer is a virtual address and the set of such addresses is the address space. Thus the address space is the set of addresses generated by the programs as they reference instructions and data. Generally, the address space is larger than the memory space.

An address in main memory is called a location or physical address. The set of such locations is called the memory space. The memory space consists of actual main memory locations directly addressable for processing. Generally, the memory space is smaller than the address space.

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