The document discusses computer storage devices. It defines primary storage devices as smaller and designed to hold data temporarily within the computer, such as RAM and cache memory. Secondary storage devices are larger capacity devices that store data permanently, both internally and externally, such as hard disks, USB drives, SD cards, CDs, DVDs, and tape drives. The document provides examples of different types of storage devices, including magnetic, optical, and flash memory, and discusses the differences between RAM and ROM. It includes multiple choice questions to test understanding of storage device terminology and functions.

1. Subject: computer class: 7
Topic: storage devices period:3
EDUCATIONAL OBJECTIVES
1. To enable the students to understand the use of computer.
2. To provide the knowledge of basic concept of computer
3. To enable students to solve the problem in computer programming
4. student should able to understand about computer language
5. student should able to know about data management in computer
INSTRUCTIONAL OBJECTIVES: after the completion of this chapter students
will be able:
1. Define storage devices of parts of computer.
2. Differentiate between ram and rom.
3. Name at least two storage devices of parts of computer.
4. State one function of at least two storage devices of parts of computer
INTRODUCTION
Storage Devices A storage device is used in the computers to store the data. Provides one of the
core functions of the modern computer
A storage device is any computing hardware that is used for storing, porting and extracting data
files and objects. It can hold and store information both temporarily and permanently, and can
be internal or external to a computer, server or any similar computing device. A storage device
may also be known as a storage medium or storage media.
There are two different types of storage devices:
Primary storage devices: Generally smaller in size, are designed to hold data temporarily and
are internal to the computer. They have the fastest data access speed, and include RAM and
cache memory. Example: RAM, CACHE
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2. Secondary storage devices: These usually have large storage capacity, and they store
data permanently. They can be both internal and external to the computer, and they
include the hard disk, compact disk drive and USB storage device.
Example: Hard-drive, USB drive, SD card, CD, DVD, Floppy disk, Tape drives ETC.

https://fossbytes.com/difference-between-ram-and-rom-memory/
https://www.quora.com/Whats-the-difference-between-RAM-and-ROM
https://techdifferences.com/difference-between-primary-and-secondary-memory.html

3. STORAGE DEVICE HIERARCHY

4. Examples of computer storage
MAGNETIC STORAGE DEVICES
Magnetic storage is one of the most common types of storage used with computers and is the
technology that many computer hard drives use.
Floppydiskette
Hard drive
Magnetic strip
Super Disk
Tape cassette
Zip diskette
OPTICAL STORAGE DEVICES
Another common storage is optical storage which uses lasers and Lights as its method of
reading and writing data.
Blu-ray disc
CD-ROM disc
CD-R and CD-RW disc
DVD-R, DVD+R and DVD+RW disc

5. FLASH MEMORY DEVICES
Flash memory has started to replace magnetic media as it becomes Cheaper as it is the more
efficient and reliable solution.
USB flash drive, jump drive
Memory card
Memory stick
https://www.computerhope.com/jargon/s/stordevi.htm
https://en.wikipedia.org/wiki/Computer_data_storage

6. MCQ
1. Cassette tape is an example of
A.secondary
B.primary
C.volatile
D.tertiary
2. Component which connects a disk drive to computer's bus is
A.a hard disk
B.a drive interface
C.a sensor
D.a standard
3. Each side of a standard DVD-ROM disk can hold data up to
A.4.7 GB
B.9.4 GB
C.17 GB
D.140 GB
4. A DVD is
A.optical disk
B.output device
C.solid state storage
D.hard disk
5. File type can be represented by
A.file name
B.file extension
C.file identifier
D.file type