Lecture #6 Hardware Flashcards
How much of AAPL’s business is hardware?
75%
What is a bit?
a 0 or 1/ a binary digit/0 is open 1 is closed switch
what is a byte
8 bits or about 1 character
what is a kilobyte?
1000 bytes
one typed pg is 2kb, one digital book is 500-800kb
what is a megabyte?
1 million bytes
1 photo is 1.3 MB, 1 MP3 song is 3MB, 1 cd is 700 MB
what is a gigabyte?
1 billion bytes
a dvd movie is 4.7 gb, a blueray is 25 GB
What are the 2statements of Moore’s Law?
Book says: speed of a chip doubles every 18 months (faster)
Rock says also:chip performance per dollar doubles every 18 months(cheaper)
what are 3 extensions of moore’s law
processing speed, storage capacity, and communication speed all continue to increase
What is the motherboard
the ting that every part connects to
what is the cpu
the central processing unit that runs the software; selects instructions, processes them, performs calculations and stores them in the memory
what is the ram
random access memory that hold the data you are currently processing
what is the video card
created images that appear on the monitor
Hard disk
holds information (long term)
Optical Drive
reads disks
Difference between volatile & Nonvolatile memory
volatile needs power (RAM), non volatile ca store without power, (Hard disk/drive)
What is flash memory and what makes it so great
it is a hard drive with no moving parts. making it nonvolatile and solid state
What is the HDD
Hard disk drive
What Is SDD
flash memory
What is IGC and do you want it?
integrated graphics card, not as good as a DGC or dedicated graphics card which can speed up different computer games
How is the speed of a harddrive measured
RPMs you want higher rpms
What is MTBF
Mean TIme Between Failure. Most of the effort of IT is keeping your existing mess running
What is the theoretical 6th Wave of computing?
QUANTUM computing. where bits are ones and zeros at the same time (QUIBITS)
What is the 6th sense
is the internet sense. computer aided everything; wearables to the extreme
What is IOT and another name for it
Internet of Things, Machine 2 Machine communication
What are three things that will eventually stop Moore’s Law
size heat power
