3. ◦MEMORY
◦Memory is used most often to identify fast,
temporary forms of storage. When the
information is kept in memory, the CPU can
access it much more quickly. Most forms of
memory are intended to store data temporarily
4.
5.
6.
7.
8. ◦Hard Drive
◦A hard drive, or hard disk drive, is a magnetic
storage device that is installed inside the
computer. The hard drive is used as permanent
storage for data.
9.
10. Types of Drive Interfaces
Hard drives and optical drives are manufactured with different
interfaces that are used to connect the drive to the computer
11. A. Fill-in the blanks with the correct letters to form a word/s that best describes the
statement.
1. These are memory cells that contain specific data needed by the CPU.
R__GI__T__R___
2. It is a drive controller interface that can connect up to 15 drives.
S_S_
3. Contents are erased when the computer is powered off.
V__LA__IL__
4. These are soldered memory chips on a special circuit board.
ME__O__Y __OD__L__
5. This is used to connect a drive to the computer.
I__TE__F__ __E
12. ◦ Write True if the statement is correct, otherwise, write
False.
◦ 6. Basic instructions for booting the computer and loading
the operating systems are stored in ROM.
◦ 7. RAM is the permanent storage for data and programs that
are being accessed by the CPU.
◦ 8. Hard drives and optical drives are manufactured with the
same interfaces that are used to connect the drive to the
computer.
◦ 9. A SATA interface uses a 7-pin data connector.
10. Early computers had RAM installed in the motherboard as
individual chips.
14. ◦DIGITAL REPRESENTATION
◦Information is represented and stored in a digital
binary format within a computer. The term bit is an
abbreviation of binary digit and represents the
smallest piece of data.
◦A bit can have only two possible values, a one digit
(1) or a zero digit (0). A bit can be used to represent
the state of something that has two states
15.
16. ◦CALCULATING DATA STORAGE
◦While a bit is the smallest representation of data, the
most basic unit of digital storage is the byte. A byte
has 8 bits and is the smallest unit of measure (UOM)
used to represent data storage capacity. When
referring to storage space, we use the terms bytes (B),
kilobytes (KB), megabytes (MB), gigabytes (GB), and
terabytes (TB).
17. ◦ One kilobyte is a little more than one thousand bytes,
specifically 1,024. A megabyte represents more than a
million bytes or 1,048,576. A gigabyte is 1,073,741,824
bytes. A terabyte is 1,099,511,627,776.
◦ Here is another conversion:
◦ 1 byte = 8bits
◦ 1kilobyte = 1,024 bytes
◦ 1 megabyte = 1,024 kilobytes
◦ 1 gigabyte = 1,024 megabyte
◦ 1terabyte = 1,024 gigabyte
18. ◦Example:
◦A file is 25KB in size
◦1KB = 1,024Bytes
◦25 x 1,024 = 25,600Bytes in a 25KB file
◦If this 25KB file is stored in a 1MB folder, how many
files can be stored in that folder?
◦1Mb = 1,024Kb
◦1,024Kb/25Kb = 40.96
◦41 files can be stored in a 1Mb folder
