|Que.||Which of the following memories has the shortest access times?|
|b.||Magnetic bubble memory|
|c.||Magnetic core memory|
Which of the following memory has the largest access time?
DRAM (dynamic random access memory) chips for personal computers have access times of 50 to 150 nanoseconds (billionths of a second). Static RAM (SRAM) has access times as low as 10 nanoseconds. Ideally, the access time of memory should be fast enough to keep up with the CPU. Was this answer helpful?
What is meant by cache memory?
Cache memory is an extremely fast memory type that acts as a buffer between RAM and the CPU. It holds frequently requested data and instructions so that they are immediately available to the CPU when needed. Cache memory is used to reduce the average time to access data from the Main memory.
Which memory has highest cost per bit?
The memory hierarchy in datacenters typically consists of different types of memory as shown in Figure 1. The on-chip SRAM memory at the top of the pyramid is the fastest, but also the most expensive and hence provisioned in limited quantity.
Which level of memory has highest cost per bit?
Memory. Computer systems have a hierarchy of memory, as shown in the diagram on the right. At the top is the register file in the CPU. This memory has the highest cost per bit, the smallest capacity, and the shortest access time.
What are the 3 types of cache memory?
There is three types of cache: direct-mapped cache; fully associative cache; N-way-set-associative cache.
What is the difference between RAM and cache memory?
RAM is a hardware element where the data being currently used is stored. It is a volatile memory. Two types of RAM are Static RAM, or (SRAM) and Dynamic RAM, or (DRAM).
Difference between RAM and Cache :
|7.||CPU reads Cache Memory data before reading RAM.||CPU reads RAM data after reading Cache Memory.|
What happens when cache memory is full?
This prevents valuable cache memory space being occupied by data unnecessarily.) This begs the question of what happens if the cache memory is already full. The answer is that some of the contents of the cache memory has to be “evicted” to make room for the new information that needs to be written there.
What is the fastest most expensive memory in your computer?
A typical computer has 3 types of memory: Cache memory, Random Access Memory (RAM), and virtual memory. Cache is the fastest and most expensive, RAM is slower and less expensive, and virtual memory is the slowest and least expensive type.
Which memory gives least cost per bit?
While disks are significantly slower than main memory, the cost per bit is also significantly lower. Therefore, it is far less expensive (by three orders of magnitude) to keep some data on magnetic storage rather than in main memory.
Which memory is costly primary or secondary?
2. Secondary Memory / Mass Storage:
|3.||Nature of Parts of Primary memory varies, RAM- volatile in nature. ROM- Non-volatile.|
|4.||Primary memory devices are more expensive than secondary storage devices.|
|5.||The memory devices used for primary memory are semiconductor memories.|
Which computer memory is faster?
Cache is a smaller and fastest memory component in the computer. Registers is a small amount of fast storage element into the processor. 2. Cache memory is exactly a memory unit.
What is secondary memory?
Secondary memory refers to storage devices, such as hard drives and solid state drives. It may also refer to removable storage media, such as USB flash drives, CDs, and DVDs. … Additionally, secondary memory is non-volatile, meaning it retains its data with or without electrical power.
Why is primary memory faster than the secondary memory?
Primary memory or RAM is faster to access because it is wired directly to the processor. It is used by the system to perform operations while programs are running. Secondary memory is usually somewhat slower and is used for permanent storage of information.