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CS 413 Chapter 10 and 11
Chapter 10 of Computer Organization and Architecture Themes and Variations by Alan Clements, c2014, for UAH CS413
29
Computer Science
Undergraduate 3
04/23/2024

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Term
What is direct access memory?
Definition
It's memory where you are able to get direct access to a specific memory location without having to access or traversing other memory location
Term
What is sequential access memory?
Definition
It's memory where you have to traverse other memory locations in order to get to a desired address
Term
What does it mean if memory is volatile?
Definition
It means that when power is turned off, all the data is lost
Term
What does it mean if memory is nonvolatile?
Definition
This means that when power is removed the data is not lost
Term
What are examples of volatile memory?
Definition
RAM, DRAM
Term
What are examples of nonvolatile memory?
Definition
Hard drives, tapes, USB drives
Term
What is static memory?
Definition
Memory that is applied at compile time using an address
Term
What is dynamic memory?
Definition
Memory that is applied at run time (use calloc() and malloc())
Term
What is write access time?
Definition
It's the amount of time taken to write data into the device
Term
What is read access time?
Definition
It's the amount of time taken to read the data from the device
Term
What is cycle time?
Definition
It's the minimum amount of time that elapses between two consecutive memory accesses
Term
Interleaved memory helps to improve _____
Definition
speed
Term
What is interleaved memory?
Definition
It is the process of alternating accessing sequential memory from multiple memory devices. It speeds up the effective address time
Term
What is DRAM?
Definition
It is Dynamic Random Access Memory and the hardware consists of memory banks with transistors and capacitors. The memory banks are interleaved. Has row and column addressing
Term
True or False: DDR is based on SDRAM technology
Definition
True
Term
What does EPROM stand for?
Definition
The erasable and programmable read-only memory
Term
True or False: Flash is memory is EEPROMs
Definition
True
Term
True or False: There is a physical limit on how many times an EPROM can be erased and rewritten.
Definition
True
Term
What does EEPROM stand for?
Definition
Electronically erasable and reprogrammable read-only memory
Term
True or False: NOR flash is more reliable than NAND flash
Definition
True
Term
True of False: magnetic hard disks, solid-state disks, and the optical CD/DVD/Blu-ray devices are all examples of secondary storage
Definition
True
Term
Magnetic disc drives all rely on _____________
Definition
iron oxide
Term
Discs use __________ to record and read the disc
Definition
magnets
Term
What are some of the hardware used in magnetic disc technology?
Definition
1. platters
2. read heads
3. write heads
4. track
5. sector
6. cylinders
Term
What does RAID stand for?
Definition
Redundant Array of Independent Disks
Term
What is RAID?
Definition
It's have multiple separate disks accessed in parallel. There are 7 levels- some focus on speed and others on reliability
Term
True or False: SSD costs twice as much per GB as HDDs
Definition
True
Term
The logical disk is divided into _____
Definition
strips
Term
A set of logically consecutive strips that maps exactly one strip to each array member is referred to as a _________
Definition
stripe
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