J277 System Softwares Flashcards
What is the Von Neumann Architecture?
A process where data and instructions are stored in the same memory
What does the Arithmetic Logic Unit (ALU) do?
Where Arithmetic and Logic Operations are done
What does the Program Counter (PC) do?
Holds the next program to be executed
What does Memory Address Register (MAR) do?
Holds the address of the current instruction, or the address where data is going to be transferred to
What does the accumulator do?
holds the result of a mathematical or logic instruction before its transfered
What is the fetch-decode-execute cycle?
The Instructions are fetched, decoded and executed by the CPU
What is clock speed?
Cycles per second measured usually in hertz (HZ)
What is Cache?
Memory on or close to the CPU that is faster than RAM
How is Processor speed measured?
One cycle per second = 1 hertz (Hz) = 1 instruction carried out each second
How many cycles a second is 1 kilohertz (kHz)?
1000 Cycles per second
How many cycles a second is 1 Megahertz (MHz)?
1,000,000 cycles per second
Why can’t you de-fragment an ssd?
Maximum amount of times that and ssd can be wrote or read.
What does RAM store?
programs and instructions
What is virtual memory?
a portion of a storage functioning as additional RAM
What is Memory Speed?
The speed that data can be accessed through the RAM
