In the previous chapter, we studied the five function of a computer. One of the functions of a computer is to store the data. But the question arises where? It stores the data in computer memory.
Computer Memory
With respect to class 6 Memory and Storage Device, inside a computer, there are different storage areas where it keeps data permanently or temporarily while working on the data, to produce the required output. This storage area is known as the Memory of the computer. Memory is a major part of a computer. It is similar to a human brain.
Types of memory
With respect to class 6 computer lessons, the memory of the computer is divided into two categories:
There are two types of primary memory. They are:
RAM is further divided into two categories:
Ans: Primary memory.
Ans: RAM.
Ans: Static RAM.
Ans: Dynamic RAM.
There are three types of ROM:
PROM is a read-only memory where a user can store data permanently. But once the data has been written, it cannot be modified or erased from PROM.
EPROM is different from PROM as unlike PROM, the program can be written on it more than once.
EEPROM is programmed and erased electrically. Data stored in EEPROM can be erased and modified as many times a user desire.
Hard Disk Drive
There are two types of Hard Disk Drive:
Compact Disk
With respect to class 6 Memory and Storage Device, a compact disk is used to read and write data. It is circular in shape. Compact disks come in various types depending upon the application. They are -
DVD Drive
With respect to class 6 Memory and Storage Device, Digital Video Disk (DVD or DVD-ROM) is a disk capable of storing large amounts of data. They are widely used for storing and viewing movies and other data. DVDs also come in three varieties – read only, recordable and rewritable.
Pen Drive
Pen drive is a portable memory device in which data can be stored permanently and erased when not needed. They are smaller, faster, high storage capacity and are more durable and reliable.
Ans: PROM.
Ans: EEPROM.
Ans: Secondary Memory.
Ans: Pen drive.
Q.1 |
A hard copy would be prepared on a- |
a) | Line printer |
b) | Dot matrix printer |
c) | Typewriter printer |
d) | All of the above |
Q.2 |
A typical personal computer used for business purposes would have___________ of RAM. |
a) | 4 KB |
b) | 16 K |
c) | 64 K |
d) | 256 K |
Q.3 |
A high quality CAD system uses the following for printing drawing and graphs- |
a) | Dot matrix printer |
b) | Digital plotter |
c) | Line printer |
d) | All of the above |
Q.4 |
Which of the following are the decision making operations performed by the ALU of a computer? |
a) |
Greater than |
b) | Less than |
c) | Equal to |
d) | All of the above |
Q.5 |
Which part of the computer is used for calculating and comparing? |
a) | Disk unit |
b) | Control unit |
c) | ALU |
d) | Modem |
Q.6 |
An online backing storage system capable of storing larger quantities of data is- |
a) | CPU |
b) | Memory |
c) | Mass storage |
d) | Secondary storage |
Q.7 |
One of a class of storage devices that can access storage locations in any order is- |
a) | DTE |
b) | DASD |
c) | DDE |
d) | DAL |
Q.8 |
Which is an item of storage medium in the form of circular plate? |
a) | Disk |
b) | CPU |
c) | Printer |
d) | ALU |
Q.9 |
Another word for a daisy wheel printer? |
a) | Petal printer |
b) | Golf ball printer |
c) | Laser printer |
d) | Line printer |
Q.10 |
An input/output device at which data enters or leaves a computer system is- |
a) | Keyboard |
b) | Terminal |
c) | Printer |
d) | Plotter |
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