Which of the following is a characteristic of a random-access memory (RAM)?
A. It is non-volatile
B. It allows access to any memory location in any order
C. It is used for long-term storage
D. It is slower than hard disks
Answer: Option B
Solution (By JKSSB Mock Tests)
RAM allows random access, meaning any location can be accessed directly without reading sequential data. It is volatile and faster than hard disks, used for temporary storage.
Explanation:
Under decimal SI metrics (often used by storage manufacturers), mega- means exactly one million ($10^6$), so 1 Megabyte equals exactly 1,000,000 Bytes.
Explanation:
DDR4 is the fourth generation of Double Data Rate (DDR) SDRAM, offering higher speeds, lower voltage, and increased density compared to DDR3.
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.
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