Random Access Memory questions
and answers
1. How does a RAM function?
Ans: Random Access Memory, or RAM, is used by computers to store and access information using
a random order. This resource provides a temporary way for computers to process electronic data,
while making computers more responsive and helping operate memory-intensive programs. RAM
chips are only capable of storing and accessing information when electrical power is present.
2. What are differences between RAM and ROM?
Ans: The main difference between RAM and ROM is Ram is volatile memory and ROM is non-
volatile memory.
Other differences between a ROM and a RAM chip include:
• A ROM chip is used primarily in the startup process of a computer, whereas a RAM chip is
used in the normal operations of a computer after starting up and loading the operating
system.
• Writing data to a ROM chip is a slow process, whereas writing data to a RAM chip is a
faster process.
• A RAM chip can store multiple gigabytes (GB) of data, up to 16 GB or more per chip; A
ROM chip typically stores only several megabytes (MB) of data, up to 4 MB or more per
chip.
3. What is a flash memory?
Ans:Flash memory is an electronic non-volatile computer storage medium that can be electrically
erased and reprogrammed. Flash memory is popular in modemsbecause it enables the modem
manufacturer to support new protocols as they become standardized. Flash memory is also
called flash RAM.
4. What are the different RAM standards/versions?
Ans:
Standard Memory Cycle I/O Data VDDQ Module Peak Timings
name clock time[4] bus rate (V) name transfer (CL-
(MHz) (ns) clock (MT/s) rate tRCD-
(MHz) (MB/s) tRP)
, DDR-200 100 10 100 200 PC-1600 1600
DDR-266 133.33 7.5 133.33 266.67 2.5±0.2 PC-2100 2133.33 2.5-3-3
DDR-333 166.67 6 166.67 333.33 PC-2700 2666.67
DDR-
400A
2.5-3-3
DDR-
200 5 200 400 2.6±0.1 PC-3200 3200 3-3-3
400B
3-4-4
DDR-
400C
5. What is the purpose of RAM in a computer?
Ans: RAM (random acces memory) Is basically the memory that runs programs, it doesn't store any
long term data unlike a hard drive disk, but its more instant, the less RAM you have the slower your
operating system will run, because it doesn't have the room to move everything about.
6. What kind of memory is a RAM categorized as?
Ans: RAM categorized into following types.
▪ DRAM
▪ SRAM
▪ DRDRAM
7. How does the CPU and the RAM communicate?
Ans: The CPU and the Memory are connected to the north bridge the cpu communicates through
the Front Side Bus and the memory is connected via the memory bus.
8. What is the function of the control lines in RAM?
Ans: Memory controllers contain the logic necessary to read and write to DRAM, and to "refresh"
the DRAM. Without constant refreshes, DRAM will lose the data written to it as the capacitorsleak
their charge within a fraction of a second (not less than 64 milliseconds according to JEDEC
standards).
9. What are the different types package forms?
and answers
1. How does a RAM function?
Ans: Random Access Memory, or RAM, is used by computers to store and access information using
a random order. This resource provides a temporary way for computers to process electronic data,
while making computers more responsive and helping operate memory-intensive programs. RAM
chips are only capable of storing and accessing information when electrical power is present.
2. What are differences between RAM and ROM?
Ans: The main difference between RAM and ROM is Ram is volatile memory and ROM is non-
volatile memory.
Other differences between a ROM and a RAM chip include:
• A ROM chip is used primarily in the startup process of a computer, whereas a RAM chip is
used in the normal operations of a computer after starting up and loading the operating
system.
• Writing data to a ROM chip is a slow process, whereas writing data to a RAM chip is a
faster process.
• A RAM chip can store multiple gigabytes (GB) of data, up to 16 GB or more per chip; A
ROM chip typically stores only several megabytes (MB) of data, up to 4 MB or more per
chip.
3. What is a flash memory?
Ans:Flash memory is an electronic non-volatile computer storage medium that can be electrically
erased and reprogrammed. Flash memory is popular in modemsbecause it enables the modem
manufacturer to support new protocols as they become standardized. Flash memory is also
called flash RAM.
4. What are the different RAM standards/versions?
Ans:
Standard Memory Cycle I/O Data VDDQ Module Peak Timings
name clock time[4] bus rate (V) name transfer (CL-
(MHz) (ns) clock (MT/s) rate tRCD-
(MHz) (MB/s) tRP)
, DDR-200 100 10 100 200 PC-1600 1600
DDR-266 133.33 7.5 133.33 266.67 2.5±0.2 PC-2100 2133.33 2.5-3-3
DDR-333 166.67 6 166.67 333.33 PC-2700 2666.67
DDR-
400A
2.5-3-3
DDR-
200 5 200 400 2.6±0.1 PC-3200 3200 3-3-3
400B
3-4-4
DDR-
400C
5. What is the purpose of RAM in a computer?
Ans: RAM (random acces memory) Is basically the memory that runs programs, it doesn't store any
long term data unlike a hard drive disk, but its more instant, the less RAM you have the slower your
operating system will run, because it doesn't have the room to move everything about.
6. What kind of memory is a RAM categorized as?
Ans: RAM categorized into following types.
▪ DRAM
▪ SRAM
▪ DRDRAM
7. How does the CPU and the RAM communicate?
Ans: The CPU and the Memory are connected to the north bridge the cpu communicates through
the Front Side Bus and the memory is connected via the memory bus.
8. What is the function of the control lines in RAM?
Ans: Memory controllers contain the logic necessary to read and write to DRAM, and to "refresh"
the DRAM. Without constant refreshes, DRAM will lose the data written to it as the capacitorsleak
their charge within a fraction of a second (not less than 64 milliseconds according to JEDEC
standards).
9. What are the different types package forms?
