Types of Memory Storage for Computer Awareness - IBPS/SBI/RRB PO/Clerk

By Unknown - Sunday, October 5, 2014 - No Comments

Hello friends!! We do know that, most of you must be very busy in preparing for the upcoming IBPS PO exams. This section is very important to the serious aspirants, since there will be question on this topics even during the interview. To make your basics strong please go through this topic of memory which helps to crack the exam. There will sure question on this topic. All the best for your preparation friends i hope you keep updating your preparation with the topics and notes we are providing you .

Some of them even follow a numerous strategies for a single exam.Storage Devices are the places where the computer stores the data. The term memory in the computer is used to store the data or information, which will help to access this information anytime when required. It acts as a storage device. There are some external devices, which are connected to the computer to store data, which are called peripheral storage device. Examples for peripheral storage device are external hard disk, flash drive, disk drive, CD ROM, DVD ROM etc. Let see the detailed explanation of storage devices.

There are two types of memory storage are:

Primary storage device
Secondary storage device

Primary memory is the main memory of the computer, is linked to the CPU, and is the part of the base unit. RAM and ROM are different divisions of the primary storage. RAM is termed Random access memory is used for temporary storage. All the data and programs required for running a process are stored, until the process is over. RAM storage space can make the computer work faster. Since it is the temporary storage memory all the data is lost when the power is turned off. There are different types of RAM are: SRAM are static random access memory, DRAM are dynamic random access memory, PRAM are phase change random access memory. RAM is volatile memory

ROM is termed as a read only memory. It is meant for the information that is permanently required to run the computer and the information will remain even if the computer is switch off. It is one of the important memory where it contains all the information that the computer requires to start up. There are different types of ROM are: PROM are programmable read only memory, EPROM are erasable programmable read only memory, EEPROM are electrically erasable programmable read only memory, CD-ROM are compact disk erasable read only memory. ROM is non-volatile memory.

Bit is the smallest memory unit. Geop byte is the highest memory unit. Flip-flop is the smallest memory device. Cache memory is the fastest memory of the computer. External hard disk is the slowest memory device.

Secondary memory is the memory where all the data and program are not running on the CPU are stored. The commonly used secondary memory storage device is disks and tapes. There are different types of disk are hard disk, floppy disk and compact disk. Hard disk is the internal storage memory in the computer. Some of the storage devices are floppy disk, hard disk, digital audio tape, CD ROM, DVD and pen drives.

Floppy disk is divided into the concentric circles called as a track, where as the track is further is divided into the sectors. The small hole present at the disk represent the starting point of the sector and is called as a index hole. Floppy disk can store up to 1.44MB or 2.88MB of the information. The floppy drive on the computer is referred as ‘B’ drive.

Hard disk can store large volumes of data as compared to the floppy disks. The capacity of the hard disk is 40GB to 200GB. Hard disks are portable. It is made up of metal and coated on both sides with metallic oxide. The alphabets D, E, F etc are used for the external hard disk in the computer.

Pen drives or flash drives are storage device with the capacity ranging from 256MB to 8GB and more. It is very small, portable, and easy to carry the volume of data.