While using the direct mapping technique, in a 16 bit system the higher order 5 bits are used for ________Question 22Select one:a.Idb.Blockc.Wordd.Tag

Break Down the Problem

1. Understand the direct mapping technique in computer architecture.
2. Identify the function of the higher-order bits in a memory address.

Relevant Concepts

• In direct mapping, a given memory address can be divided into three parts: Tag, Index (block), and Offset (word).
• The tag is used to determine if the data in the cache corresponds to the requested data.

Analysis and Detail

1. In a 16-bit system, with a certain cache size, the total number of bits will be divided such that:

   • The higher-order bits are typically reserved for the Tag.
   • The lower-order bits are used to determine the specific block location (Index) and the exact word within that block (Offset).

2. Since the direct mapping technique employs a tag to denote which block of main memory maps to which cache line, the higher order bits serve this role.

Verify and Summarize

• The question asks specifically about the higher-order 5 bits. In a direct mapping scenario:
  • These 5 bits are used to form the Tag.

Final Answer

d. Tag