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Cyberspace Quiz 4
| Question | Answer |
|---|---|
| Digital Graphics | Computer-based media applications that support creating, editing, and viewing 2D and 3D images and animation |
| RGB color | a method of specifying color digitally using values for the intensity levels of red, green, and blue (RGB) as combined to create all colors |
| Image resolution | expressed as the number of horizontal and vertical pixels |
| Higher resolutions contain more ____ and are ____ quality | data, higher |
| How are the file size of bitmaps reduced? | by cropping |
| Bitmaps are _______ ______ | resolution dependent |
| Image compression | any technique that recodes data in an image file so it contains fewer bits |
| What are two types of image compression | lossless compression, lossy compression |
| What are bitmap graphics composed of? | grids and dots, color of each dot is stored as a binary number. They do not have a fixed physical size |
| What is graphic software used for? | to modify or edit bitmap graphics. they can be used to modify individual pixels to retouch photographs, wipe out red eye |
| What do vector graphic basics contain? | instructions for re-creating a picture |
| Vector graphics resize ____ than bitmaps | better |
| Vector graphics usually require _____ storage space than bitmaps | less |
| Vector graphics are not usually as _____ as bitmap images | realistic |
| Vector Graphics are _____to edit an object in vector graphic than an object in a bitmap graphic | easier |
| What does rasterization do | It superimposes a grid over a vector image and determines the color for each pixel |
| What does tracing software do? | it locates the edges of objects in a bitmap image and convert the resulting shapes into vector graphic objects |
| What does SVG stand for | scalable vector graphics |
| What are SVG and Flash | vector graphic formats for the web |
| What are advantages of using vector graphics | consistent quality, searchable, compact file size |
| What are 3D graphics stored as | a set of instructions that contain locations and lengths of lines forming a wireframe |
| What does rendering 3D graphics do | It covers a wireframe with a surface color and texture |
| Digital video | stores a progression of digital photographs and displays them at 24 to 30 photos, or frames, per second to give the illusion of a smoothly flowing scene |
| What do digital cameras do | they store footage as a series of bits |
| What do analog video cameras do | They store video signals as a continuous track of magnetic patterns |
| What do videoconferencing cameras (web cam) do | attach directly to a computer |
| Which formats are ideal for editing | Raw, uncompressed formats |
| What can video capture software do | Control the transfer process, decrease video display size, reduce the frame rate, compress data |
| Interactive media | refers to digital media that involve user interaction for education, training, or entertainment |
| Video game | uses 2D or 3D interactive digital media for gaming entertainment, for individuals or groups using handheld devices, game consoles, computers, and the Internet |
| What is virtual reality | a computer-simulated, three dimensional environment that can be explored and manipulated by a user |
| What is augmented reality | displays computer-generated information over objects viewed in real time space |
| What does DRM basics stand for? | Digital rights management |
| What is DRM | a collection of techniques used by copyright holders to limit access and use of digital content |
| What is signal scrambling | a term commonly used for obscuring cable or satellite television images until they are unscrambled by a set-top box or other authorized mechanism |
| What is a digital watermark | a pattern of bits inserted at various places in an image or a content stream that can be used to track, identify, verify, and control content use |
| What is a database | A collection of data organized so you can access, retrieve, and use it |
| what is DBMS | Database software that stands for database management system |
| What is data integrity | the degree to which data is correct, the more errors the data contains, the lower the integrity |
| What is GIGO | garbage in = garbage out, incorrect data in = incorrect information out |
| What are qualities of valuable information | accurate, verifiable, timely, organized, accessible, useful, cost-effective |
| Data hierarchy | refers to the manner in which data in a database is organized into sequential levels of detail |
| What is a record in the hierarchy of data | a group of related fields |
| What is a key field? | also called primary key, it uniquely identifies each record |
| What is a data file | a collection of related records stored on disk |
| What is a file processing system (flat file) | each area or department within an organization has own set of files. the records in one file may not relate to records in any other file |
| Database approach | many programs and users can share data in database, it secures data so only authorized users can access certain data |
| What is file maintenance | procedures that keep data current |
| What are some examples of maintaining data | Adding records, changing records, deleting/flagging records |
| what is validation | the process of comparing data with a set of rules to find out if data is correct |
| What are validity checks (validation rules) | rules that reduce entry errors |
| What is a data dictionary | contains data about each file in database and each field within those files, can be used for validation checks |
| What do relational databases do | Stores data in tables that consist of rows and columns, stores data relationships, connects with data, normalization |
| Each row in a relational database has a ______ _____ | primary key |
| Each column in a relational database has a ____ | unique name |
| What does normalization do? | reduces data redundancy |
| What is a relationship in a relational database? | A connection within data |
| What is SQL and what does it do | Structured Query Language, it allows you to manage, update, and retrieve data. It has special keywords and rules included in SQL statements |
| What is query? | a request for specific data from a databaSE |
| What is query language | consists of simple, English-like statements that allow users to specify data to display, print or store |
| What do database management system reports do | allows user to design a report, retrieve data, then display or print reports. It is also called a report writer |
| What does DBMS do? | It provides means to ensure only authorized users can access data |
| What are access privileges | define activities that specific user or group of users can perform |
| What are read-only privileged: | user can view data but cannot change it |
| What are full-update privileges | user can view and change data |
| What is a data warehouse | a huge database system that stores and manages data required to analyze historical and current transactions |
| What is data mining? | a process used to find patterns and relationships among data |
| What is data mart | a smaller version of data warehouse |
| what is a web database | a database you access through the Web by filling in a form on a Web page |
| what i a database server | a computer that stores and provides access to a database |
Created by:
nicolefassak