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Which of the following is a primary storage device?
Hard Disk
ROM
DVD
Pen Drive
ROM
ROM (Read-Only Memory) is classified as a primary storage device because the CPU can access it directly. Unlike secondary storage devices, primary storage holds data and instructions that the computer requires immediately during execution.
ROM (Read-Only Memory) is classified as a primary storage device because the CPU can access it directly. Unlike secondary storage devices, primary storage holds data and instructions that the computer requires immediately during execution.
Computer memory architecture categorizes storage into primary memory (RAM, ROM) and secondary memory (HDDs, SSDs, optical disks) based on CPU accessibility and volatility.
Primary storage (Main memory) includes RAM and ROM, which are directly accessed by the central processing unit.
ROM is a non-volatile primary memory type that permanently stores essential startup instructions like the BIOS.
Secondary storage devices provide high-capacity, non-volatile external data retention.
Option A (Hard Disk) is a secondary magnetic storage device used for long-term data persistence.
Option C (DVD) is an optical secondary storage disc.
Option D (Pen Drive) is a flash-based portable secondary storage device.
B is correct тАФ ROM is directly accessible by the CPU, classifying it as a primary storage device.
Make sure to clearly distinguish between volatile primary memory (RAM) and non-volatile primary memory (ROM), as exam questions frequently mix these up with secondary storage types.