Arrange the following in the increasing order with respect to access time. A.…

Answer (increasing access time — fastest to slowest): Registers, SRAMs, DRAMs, Solid State Drive, Optical Disks

• Registers: Fastest access because they are inside the CPU and used for immediate operations (on the order of sub-nanoseconds to a few nanoseconds).

• SRAMs: Used for CPU caches; very fast static memory (a few nanoseconds), slower than registers but faster than DRAM.

• DRAMs: Main system memory; slower than SRAM (tens of nanoseconds) but much faster than persistent storage like SSDs or optical media.

• Solid State Drive (SSD): Persistent flash storage with access times typically in the microsecond range; significantly slower than DRAM but much faster than optical disks.

• Optical Disks: Slowest access due to mechanical rotation and seek times (milliseconds); therefore last in increasing access time.

Key takeaway: place storage types from the fastest (closest to CPU and smallest latency) to the slowest (mechanical or higher-latency persistent media).