Characteristics of Memory - 2 Video Lecture | Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)

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1. What are the different types of memory in computer science?
Ans. In computer science, there are mainly two types of memory: primary memory and secondary memory. Primary memory, also known as main memory, includes RAM (Random Access Memory) and cache memory. Secondary memory includes hard drives, solid-state drives (SSDs), and external storage devices.
2. What is the role of cache memory in the computer system?
Ans. Cache memory is a smaller, faster memory unit located closer to the CPU. Its main role is to store frequently accessed data and instructions, providing quick access to them. By storing frequently used information, cache memory reduces the need to access slower primary memory, improving overall system performance.
3. How does RAM differ from a hard drive in terms of memory characteristics?
Ans. RAM (Random Access Memory) is a type of primary memory that is volatile, meaning its contents are lost when the computer is powered off. It is used to temporarily store data and instructions that are actively being used by the CPU. On the other hand, a hard drive is a type of secondary memory that is non-volatile, retaining its contents even when the power is turned off. It is used for long-term storage of data and programs.
4. What is virtual memory and why is it used in computer systems?
Ans. Virtual memory is a memory management technique used by computer systems to extend the available memory beyond the physical limits of RAM. It uses a portion of the hard drive as an extension of the RAM, allowing the system to run larger programs and handle more data than can fit in physical memory alone. Virtual memory provides an illusion of having more memory than actually available and helps prevent memory shortage issues.
5. How does solid-state drive (SSD) memory differ from traditional hard drives?
Ans. Solid-state drives (SSDs) differ from traditional hard drives in terms of memory characteristics. While traditional hard drives use spinning disks and magnetic storage to store data, SSDs use flash memory technology. This makes SSDs faster, more durable, and less prone to mechanical failures. Additionally, SSDs consume less power and produce less noise compared to traditional hard drives. However, SSDs are generally more expensive per unit of storage compared to traditional hard drives.
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