Arrange the following from fastest to slowest in speed.
A. DRAM
B. SRAM
C. CPU Registers
D. Magnetic tapes
E. Hard disk
Choose the correct answer from the options given below:

Correct option is B

The speed hierarchy from fastest to slowest is: CPU Registers, SRAM, DRAM, Hard Disk and Magnetic Tapes. CPU registers are the fastest as they are directly accessed by the CPU for quick data retrieval. SRAM is faster than DRAM due to its simpler design and lack of need for refreshing. DRAM is slower than SRAM but faster than mechanical storage like hard disks. Magnetic tapes are the slowest, typically used for archival storage.