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SK0-004 · Question #902

A server is experiencing heavy disk thrashing due to a need for more memory. A manager asks the server technician to install 32GB of static RAM on the server. The technician tells the manager this…

The correct answer is B. static RAM does not come in this size. Static RAM (SRAM) requires six transistors per bit and is only manufactured in small capacities for CPU cache use - 32GB SRAM modules do not exist as a commercial product.

Server hardware installation and management

Question

A server is experiencing heavy disk thrashing due to a need for more memory. A manager asks the server technician to install 32GB of static RAM on the server. The technician tells the manager this is incorrect because:

Options

  • Athe RAM used in this case is dynamic RAM.
  • Bstatic RAM does not come in this size.
  • Cdynamic RAM is used for CMOS.
  • Dstatic RAM needs a refresh cycle.

How the community answered

(59 responses)
  • A
    2% (1)
  • B
    92% (54)
  • C
    3% (2)
  • D
    3% (2)

Why each option

Static RAM (SRAM) requires six transistors per bit and is only manufactured in small capacities for CPU cache use - 32GB SRAM modules do not exist as a commercial product.

Athe RAM used in this case is dynamic RAM.

While server main memory does use DRAM, this statement alone does not explain why '32GB of static RAM' is impossible to install - it is an incomplete justification for the technician's objection.

Bstatic RAM does not come in this size.Correct

SRAM cells use six transistors per bit versus one capacitor-transistor pair for DRAM, making SRAM orders of magnitude more expensive and physically larger per unit of storage capacity. Due to this density limitation, SRAM is only produced in sizes ranging from kilobytes to a few megabytes, exclusively for CPU L1, L2, and L3 cache applications. A 32GB SRAM module is not a product that exists or can realistically be manufactured, so the manager's request cannot be fulfilled as stated.

Cdynamic RAM is used for CMOS.

CMOS real-time clock circuits retain their settings using a small amount of SRAM backed by a battery, not dynamic RAM, making this statement factually incorrect.

Dstatic RAM needs a refresh cycle.

It is dynamic RAM (DRAM) that requires periodic refresh cycles to prevent data loss, not SRAM - SRAM retains its state as long as power is supplied without any refresh needed.

Concept tested: SRAM vs DRAM characteristics and capacity constraints

Source: https://www.kingston.com/us/memory/resources/sram-vs-dram

Topics

#RAM types#static RAM#dynamic RAM#server memory

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