Notes Flashcards
What is an Operating System?
The OS is the interface between user and hardware
What is the process manager of the computer?
CPU
What 4 things that comprise the operating system?
Process Manager
Memory Manager
File Manager
Device Manager
What is plug and play?
a device/computer bus with a specification that facilitates the discovery of a hardware component in a system without the need for physical device configuration or user intervention in resolving resource conflicts.
True or False? Is the network manager part of the device manager?
True
What is 802.11?
a set of technology standards for wireless network devices.
What are the three criteria of a CPU?
Speed, Cores, and Cache
What is more important in a CPU: Speed, Cores, or Cache?
All of them.
What are the 4 different levels of memory?
- Register (32 or 64 bit)
- Cache
- Main Memory
- Secondary Memory
What is a bit?
a unit of information expressed as either a 0 or 1 in binary notation.
How many numbers do we have in base 2?
2
How many digits does 1243 have?
4, good job!
What is 34 in binary?
100010
34/2 = 17, remainder is 0 17/2 = 8, remainder is 1 8/2 = 4, remainder is 0 4/2 = 2, remainder is 0 2/2 = 1, remainder is 0 1/2 = 0, remainder is 1
What is 45 in binary?
101101
45/2 = 22, remainder is 1 22/2 = 11, remainder is 0 11/2 = 5, remainder is 1 5/2 = 2, remainder is 1 2/2 = 1, remainder is 0 1/2 = 0, remainder is 1
What is 255 in binary?
11111111
255/2 = 127, remainder is 1 127/2 = 63, remainder is 1 63/2 = 31, remainder is 1 31/2 = 15, remainder is 1 15/2 = 7, remainder is 1 7/2 = 3, remainder is 1 3/2 = 1, remainder is 1 1/2 = 0, remainder is 1
What is 1101101 in decimal?
1x2^6 + 1x2^5 + 0x2^4 + 1x2^3 + 1x2^2 + 0x2^1 + 1x2^0
= 1x64 + 1x32 + 0x16 + 1x8 + 1x4 + 0x2 + 1x1
= 64 + 32 + 0 + 8 + 4 + 0 + 1 = 109
What is the unit used for your internet? megabit or in megabyte?
megabit (Mb)
What is the unit used for file transfer/downloading? megabit or in megabyte?
megabyte (MB)
What is the unit used for memory? megabit or in megabyte?
megabyte (MB)
Phone’s download files using megabit or megabyte?
megabyte (MB)
Phone’s network speed is in megabit or megabyte?
megabit (Mb)
If you want to convert 40Mbps to MB? What do you do?
Divide by 8, answer is 5 MB.
Anything about memory is ___
Anything about transferring/network is ___
MB, Mb
What is the Main Memory?
RAM
Why is RAM, random?
Because it is the ability to access an arbitrary element of a sequence in equal time or any datum from a population of addressable elements roughly as easily and efficiently as any other, no matter how many elements may be in the set.
It is typically contrasted to sequential access.
What is an example of Sequential Access Memory?
Videotape, because it’s in order lol.
What are the two types of HDD?
Magnetic and SDD