Memory Hierarchy.pptx

topic on memory hierarchy
BCA latest ppt. on Memory

1. College Name Here... Submitted by: xyz Class : BCA-1 st Year Semester : xyz th SEM Roll No. : 123456789 Topic: Memory Hierarchy by geekshelp

2. Memory Memory is the most essential element of a computing system Without it computer can’t perform any tasks.  Basically, memory is used to store Data, Information and Programs. Data, Information and Programs these are stored in the form of 0 or 1 bit by geekshelp

3. Memory Hierarchy Memory Hierarchy is a pyramid structure that is commonly used to illustrate the significant differences among memory types. The memory unit that directly communicate with CPU is called main memory. Devices that provide backup storage are called auxiliary memory. The memory hierarchy system consists of all storage devices employed in a computer system from the slow by high-capacity auxiliary memory to a relatively faster main memory, to an even smaller and faster cache memory. by geekshelp

4. Hierarchy Diagram Level 0 Level 1 Level 2 Level 3 Level 4 Increase in cost per bit Increase in Capacity & Access Time by geekshelp

5. Types of Memory Hierarchy External or Secondary Memory Internal or Primary Memory Comprising of Magnetic Disk, Optical Disk, Magnetic Tape i.e. Peripheral storage devices which are accessible by the processor via I/O Module. Comprising of Main Memory , Cache Memory & CPU registers. This is directly accessible by the processor. by geekshelp

6. CPU Registers It is a static RAM or SRAM in the processor. Usually, it is used for holding the data word which is typically 64 or 128 bits. The program counter register is most important as well as found in all the processors. Most processors use a status word register as well as an accumulator. Status word register is used for decision making. And accumulator is used to store the data like mathematical operation. by geekshelp

7. Cache Memory Cache memory can also be found in the processor. It is a special very high-speed memory and used to speed up the synchronizing with high-speed CPU. Cache memory is costlier than main memory or other memory but cheaper than CPU registers. It acts as a buffer between RAM and the CPU. Mainly, it is used to reduce the average time to access data from the main memory. This memory is a smaller but it is fast memory. by geekshelp

8. Main Memory It is the memory unit in the CPU that communicates directly. It is the main storage unit of the computer. This memory is fast as well as large memory used for storing the data. This memory is made up of RAM as well as ROM. In main memory contents lost when we turn off our Computer by geekshelp

9. Magnetic Disk A magnetic disk uses a magnetization process to read, write, rewrite and access data. The Magnetic disk is made of a set of circular platters. The data in the magnetic disk is randomly accessed. Hard disks, zip disks, are common examples of magnetic disks. The number of bits stored on each track does not by geekshelp

10. Optical Disk and Magnetic Tape An optical disk uses optical storage techniques and technology to read and write data. In the optical disk, the data is sequentially accessed. In optical disk, optical (light) energy is used . It stores data digitally and uses laser beams to read and write data. It uses the optical technology in which laser light is centred to the spinning disks. by geekshelp

11. Thank You! by geekshelp