Which of the following is used in main memory?

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MP Vyapam Group 4 (Assistant Grade-3/Stenographer) Official Paper (Held On: 16 July, 2023 Shift 1)
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  1. SRAM
  2. DRAM
  3. PRAM
  4. DDR

Answer (Detailed Solution Below)

Option 2 : DRAM
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Detailed Solution

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The correct answer is DRAM.

key-point-imageKey Points

  • Dynamic Random-Access Memory (DRAM) is a type of random access memory used in most modern computer systems.
    • DRAM stores each bit of data in a separate capacitor within an integrated circuit.
    • Because capacitors leak charge, the information eventually fades unless the capacitor charge is refreshed periodically. This is why DRAM is called "dynamic".
    • DRAM is used in main memory because it is relatively inexpensive and can store large amounts of data.
    • It is slower than Static RAM (SRAM), but its cost-effectiveness and density make it suitable for main memory applications.

additional-information-imageAdditional Information

  • DRAM technology has evolved over the years, with various generations such as DDR (Double Data Rate), DDR2, DDR3, DDR4, and the latest DDR5.
  • Each new generation of DRAM provides improvements in speed, power consumption, and data transfer rates.
  • DRAM is volatile memory, meaning it loses its data when the power is turned off.
  • In contrast, SRAM is faster but more expensive and is typically used for cache memory.
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