IGDTUW 2025 — Computer PYQ

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Question

IGDTUW 2025 — Computer PYQ

IGDTUW | Computer | 2025

The reason for the fast operating speeds of the flash drives is ____________

Choose the correct answer:

Explanation

The correct answer is (d) All of the mentioned.

Conceptual Breakdown

Flash drives (USB drives, SSDs) are classified as solid-state storage devices. Their superior speed compared to older mechanical storage methods (like Hard Disk Drives - HDDs) is due to a combination of architectural advantages:

Absence of Movable Parts: Unlike HDDs, which rely on a spinning magnetic platter and a mechanical read/write head, flash drives use NAND flash memory. Since there is no mechanical movement involved, there is zero seek time or rotational latency.
Integrated Electronic Hardware: Flash drives utilize advanced controller chips that manage data placement and wear-leveling at high speeds, allowing for near-instantaneous access to any part of the memory.
Improved Bandwidth Connection: Modern interfaces (like USB 3.0, 3.1, 3.2, or NVMe protocols) allow for high-speed data transfer rates, significantly increasing the throughput of the device.

Mathematical Representation of Access Time

The total access time ( $T_{t o t a l}$ ) for a storage device can be expressed as:

$T_{t o t a l} = T_{see k} + T_{r o t a t i o na l} + T_{t r an s f er}$

In a mechanical Hard Disk Drive (HDD):

$T_{seek} > 0$ (Time to move the physical head)
$T_{rotational} > 0$ (Time for the platter to rotate)

In a Flash Drive (Solid State):

$T_{see k} = 0$
$T_{r o t a t i o na l} = 0$

Therefore, for a flash drive:

$T_{t o t a l} = T_{t r an s f er}$

Because $T_{see k}$ and $T_{r o t a t i o na l}$ are eliminated, the flash drive is significantly faster, relying purely on the electronic transfer speed supported by its hardware and bandwidth capacity.