Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
31 Cards in this Set
- Front
- Back
system clock (measured in hertz)
|
2.4 billion clock cycles per sec
|
|
software
|
freeware, shareware, public domain software
|
|
PDA (palm pilot)
|
softwares- PIM (calendar, addresses)
|
|
spreadsheet software
|
excel (use charts)
|
|
DVD-ROM
|
digital versatile disc-ROM or
digital video disc-ROM high capacity disc storing 4.7 GB to 17GB must have DVD-ROM drive or DVD player to read stores databases, music, complex softwares, movies |
|
DVD-RW
|
Rewritable DVD
some are double sided |
|
different ways to upgrade CPU
|
chip to chip
piggy back daugther board upgrade |
|
microprocessor
|
CPU
|
|
processor
|
(central processing unit)
interprets and carries out basic instructions that operate a computer. control unit. arithmetic logic unit (ALU). |
|
The four operations of the CPU that make up the machine cycle.
|
1. fetch- obtain program instructions or data item from memory.
2. decode- translate instructions into commands. 3. execute- carry out and command. 4. store- write result to memory. |
|
cache
|
helps speed computer processes by storing frequently used instructions and data.
also called memory cache. |
|
how is application software distributed
|
packaged software, custom software, shareware, freeware, public-domain software
|
|
how big is a point?
|
1/72nd of an inch
|
|
what is a nanosecond?
|
1 billionth of a second
|
|
what is the average size of a harddrive
|
40-250 gigabites
|
|
kilobite
|
1000
|
|
megabite
|
1,000,000
|
|
gigabite
|
1,000,000,000
|
|
terabite
|
1,000,000,000,000
|
|
what is spreadsheet software?
|
-organizes data
-performs calculations and recalculates when data changes. =A1+B2(*C12) =D1+E2(*F12) =Sum (C12:Y12) |
|
what is a function?
|
a predefined formula that performs calculations
=C4+C5+C6+C7+C8 =SUM (C4:C8) |
|
what are the different parts of the database?
|
-a table contains records
-a record is a row in a table that contains information about a person, product, or event -a field is a column in a table that contains a specific piece of information within a record |
|
what does volatile mean?
|
the information is lost when the computer is turned off
|
|
storage medium is nonvolatile
|
contents are restored when power is turned off
|
|
memory is volatile
|
holds data and instructions temporarily
|
|
floppy disk formula
|
2 sides x 80 tracks x 18 secotrs per track x 512 bites per sector= 1.44 MB
|
|
what is a cylinder?
|
vertical section of track through all platters; single movement of read/write head arms accesses all platters in cylinder
|
|
what is a disk cache?
|
portion of memory that processor uses to store frequently accessed items
1st request for data- to disk cache 2nd request for data- to hard disk |
|
what is a track
|
divided into evenly sized sectors that store items
|
|
what is static ram (SRAM)
|
used for special applications such as cache
faster and more reliable than DRAM chips |
|
what is dynamic ram (DRAM)
|
most common type
faster variations of DRAM are SDRAm and RDRAM |