managing data Flashcards
image size?
- dimensioned in pixels
- megapixels is the total image area
- each pixel is a colour
print v screens?
print
- dimensioned in inches or cm
- image needs to match paper shape
screens
- shows image based on size of screen
- automatically resampled to fit
aspect ratio?
- shape of image, shape of paper
cropping v resampling?
cropping
- trimming edges to resize
-discards trimmed pixels
resampling
- changing number of pixels to resize
lossy compression?
compression method that reduces file size by permanently discarding some data, resulting in some loss of quality\
- JPEG, TIFF, WME
lossless compression?
compression method that reduces file size without loosing data, allowing the original file to be perfectly reconstructed
- BMP, PNG, GIF
image file compression methods?
- reduce number of pixels (resolution)
- reduce bit depth for each pixel (number of available colours
pixel definition?
the tiny dots that make up an image
bit depth?
the number of bits used to represent each pixel in an image, determining the number of available colours
what is online data management?
- ensures data is acquired, validated, stored and protected in a standard way
what is metadata?
- the descriptive information about the data youre using
e.g. structure, content, permissions, author, date, location, purpose
what is the 321 storage method?
- store three copies
- use two types of storage methods
- one storage method should be offsite
data storage locations examples?
- desktop
- network drives
- hard drives
- optical storage
- cloud storage
- flash drive
what is documentation levels?
produce multiple levels of documentation that provides full context to why it exists + how it can be used
what is data management software (DMS)?
- software that takes in data and converts to single storage containers
e.g. microsoft sharepoint, google drive
why DMS?
- data quality (fills gaps)
- data control (records when altered0
- data security (access control)
- risk management (controlled processes)
- automation (repetitive tasks)
DMS uses?
- data warehousing
- data analytics
- data compliance
- data governance
what is cloud computing?
the delivery of computing services over the internet to offer faster innovation, flexible resources and economies of scale.
- uses network of remote servers to store, manage, and process data rather than a local server
what is the cloud?
the internet
benefits of cloud computing?
- cost (all in one)
- speed (fast)
- global scale
- productivity (quicker, easier,
- performance
- reliability
- security
what is the public cloud?
- a cloud computing environment owned and operated by a third-party providers, delivering services over the internet
- available to anyone
- free or subscription
- most popular
- everything managed by provider
e.g. microsoft azure
private cloud?
- used exclusively by one business/organization
- physically located at organization
- everything maintained on private network, solely dedicated to organization
e.g. amazon vpc
hybrid cloud?
- combo of private and public
- allow data to move between both environments
- greater flexibility
- used by big global organizations e.g. netflix, airbnb, uber
e.g. google anthos
uses of cloud computing?
- widely utilized in everyday activities
- cloud computing helps operate everything
-apps run and hosted in cloud - infrastructure easily scaled
- store, back up and recover data
- cloud annalyses data
what is disk fragmentation?
- the process of files breaking into smaller pieces, scattered across a HD to fit
what is disk clean up?
- a computer maintenance utility that frees up disk space by removing unnecessary files
cloud storage?
- is a networked storage abailable over the internet
- everything stored there
e.g. onedrive, google drive, dropbox, icloud
benefits- lots of storage, portability, back up
disadvantages-stability of providers, cost, security, performance
what is defragmentation?
- the process of rearranging the data on a storage medium, for efficient storage and easy access
what is malware?
malicious (dangerous) software designed to harm computers
what is a virus and a worm?
virus - spreads by attaching itself to other programs
worm - replicates itself and spreads to other computers
what is a trojan and spyware?
trojan - program that disguises as legit software to trick users
spyware - secretly monitors user activity + collect personal data
what is rootkit and adware?
rootkit - hides its presence on a computer and grants controll
adware - displays itself as unwanted ads
what is ransomware?
encrypts a users file and demands a payment to decrypt
whats cryptojacking and malvertising?
crptojacking - users computer resources to mine cryptocurrency without usres knowledge
malvertising - use of legit ads to deliver malware
what is signature based and behaviour based detection?
signature - uses a database of known malware signatures to identify matching signatures and malware
behaviour - analyses behaviour of programs
what is sandboxing?
a security feature that isolates potentially malicious files from the rest of the system. they run programs in virtual environments
What is privacy laws?
A set of regulations that governs the collection, use and storage of an individuals personal information
