What is the purpose of a memory module's SPD (Serial Presence Detect) chip?
A. To increase memory speed
B. To detect memory errors
C. To provide additional storage
D. To store the memory's configuration parameters for the BIOS
Answer: Option D
Solution (By JKSSB Mock Tests)
SPD is a small EEPROM on a DIMM that stores information about the memory module's size, speed, voltage, and timings, which the BIOS reads to configure the memory controller.
What is the name of the high-speed data transfer mechanism that allows specific hardware subsystems to access main system memory independently of the central processing unit?
Explanation:
DMA (Direct Memory Access) allows peripherals like network cards or graphics adapters to read/write directly to system RAM without routing the data through the CPU, reducing processor overhead.
Explanation:
NAND flash memory is used in USB drives, SSDs, and memory cards due to its high density, faster write speeds, and lower cost per bit compared to NOR flash.
Explanation:
SSDs have much faster random access times because there is no mechanical latency (seek time, rotational latency). They are also more resistant to shock and quieter.
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