Which of the following options does the CPU memory include?

Correct option is C

CPU memory refers to the types of memory that are either embedded within or tightly coupled to the processor for high-speed data access. This includes:

• Cache Memory: A small, fast memory located inside or near the CPU, used to temporarily hold frequently accessed data and instructions.
• Scratch Pad Memory (SPM): A high-speed internal memory used for temporary storage of intermediate results and variables — often seen in embedded systems and advanced CPU architectures.

Both Cache and Scratch Pad Memory are directly accessible by the CPU and are used to improve execution speed and reduce latency.

Important Key Points:

1. CPU memory comprises fast-access, low-latency components that directly support processor operations.
2. Cache Memory is used for storing frequently used data to avoid repeated access to slower RAM.
3. Scratch Pad Memory offers manual data control and is often used in performance-critical applications.

Knowledge Booster:

• Secondary Memory: Refers to storage devices like hard disks and SSDs; it is non-volatile and external to the CPU, hence not part of CPU memory.
• Only Scratch Pad Memory: Incorrect, because cache memory is also an essential component of CPU memory hierarchy.
• Only Cache Memory: Partially correct but incomplete, as Scratch Pad Memory is also considered in some modern CPU designs.